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
117struct individual_sensor {
118	unsigned int token;
119	unsigned int quant;
120};
121
122struct rtas_sensors {
123        struct individual_sensor sensor[MAX_SENSORS];
124	unsigned int quant;
125};
126
127/* Globals */
128static struct rtas_sensors sensors;
129static struct device_node *rtas_node = NULL;
130static unsigned long power_on_time = 0; /* Save the time the user set */
131static char progress_led[MAX_LINELENGTH];
132
133static unsigned long rtas_tone_frequency = 1000;
134static unsigned long rtas_tone_volume = 0;
135
136/* ****************************************************************** */
137/* Declarations */
138static int ppc_rtas_sensors_show(struct seq_file *m, void *v);
139static int ppc_rtas_clock_show(struct seq_file *m, void *v);
140static ssize_t ppc_rtas_clock_write(struct file *file,
141		const char __user *buf, size_t count, loff_t *ppos);
142static int ppc_rtas_progress_show(struct seq_file *m, void *v);
143static ssize_t ppc_rtas_progress_write(struct file *file,
144		const char __user *buf, size_t count, loff_t *ppos);
145static int ppc_rtas_poweron_show(struct seq_file *m, void *v);
146static ssize_t ppc_rtas_poweron_write(struct file *file,
147		const char __user *buf, size_t count, loff_t *ppos);
148
149static ssize_t ppc_rtas_tone_freq_write(struct file *file,
150		const char __user *buf, size_t count, loff_t *ppos);
151static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v);
152static ssize_t ppc_rtas_tone_volume_write(struct file *file,
153		const char __user *buf, size_t count, loff_t *ppos);
154static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v);
155static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v);
156
157static int poweron_open(struct inode *inode, struct file *file)
158{
159	return single_open(file, ppc_rtas_poweron_show, NULL);
160}
161
162static 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
170static int progress_open(struct inode *inode, struct file *file)
171{
172	return single_open(file, ppc_rtas_progress_show, NULL);
173}
174
175static 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
183static int clock_open(struct inode *inode, struct file *file)
184{
185	return single_open(file, ppc_rtas_clock_show, NULL);
186}
187
188static 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
196static int tone_freq_open(struct inode *inode, struct file *file)
197{
198	return single_open(file, ppc_rtas_tone_freq_show, NULL);
199}
200
201static 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
209static int tone_volume_open(struct inode *inode, struct file *file)
210{
211	return single_open(file, ppc_rtas_tone_volume_show, NULL);
212}
213
214static 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
222static int ppc_rtas_find_all_sensors(void);
223static void ppc_rtas_process_sensor(struct seq_file *m,
224	struct individual_sensor *s, int state, int error, const char *loc);
225static char *ppc_rtas_process_error(int error);
226static void get_location_code(struct seq_file *m,
227	struct individual_sensor *s, const char *loc);
228static void check_location_string(struct seq_file *m, const char *c);
229static void check_location(struct seq_file *m, const char *c);
230
231static 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
259static 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/* ****************************************************************** */
277static 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/* ****************************************************************** */
299static 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/* ****************************************************************** */
311static 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/* ****************************************************************** */
333static 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/* ****************************************************************** */
343static 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/* ****************************************************************** */
362static 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/* ****************************************************************** */
384static 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
428static 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 */
452static 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
485static 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
638static 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 */
675static 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
689static 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/* ****************************************************************** */
702static 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/* ****************************************************************** */
719static 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/* ****************************************************************** */
727static 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/* ****************************************************************** */
747static 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 */
765static 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