patch-2.4.1 linux/arch/ppc/kernel/proc_rtas.c

• Lines: 785
• Date: Mon Jan 22 15:41:15 2001
• Orig file: v2.4.0/linux/arch/ppc/kernel/proc_rtas.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0/linux/arch/ppc/kernel/proc_rtas.c linux/arch/ppc/kernel/proc_rtas.c
@@ -0,0 +1,784 @@
+/*
+ *   arch/ppc/kernel/proc_rtas.c
+ *   Copyright (C) 2000 Tilmann Bitterberg
+ *   (tilmann@bitterberg.de)
+ *
+ *   RTAS (Runtime Abstraction Services) stuff
+ *   Intention is to provide a clean user interface
+ *   to use the RTAS.
+ *
+ *   TODO:
+ *   Split off a header file and maybe move it to a different
+ *   location. Write Documentation on what the /proc/rtas/ entries
+ *   actually do.
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <linux/time.h>
+#include <linux/string.h>
+
+#include <asm/uaccess.h>
+#include <asm/bitops.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/machdep.h> /* for ppc_md */
+#include <asm/time.h>
+
+/* Token for Sensors */
+#define KEY_SWITCH		0x0001
+#define ENCLOSURE_SWITCH	0x0002
+#define THERMAL_SENSOR		0x0003
+#define LID_STATUS		0x0004
+#define POWER_SOURCE		0x0005
+#define BATTERY_VOLTAGE		0x0006
+#define BATTERY_REMAINING	0x0007
+#define BATTERY_PERCENTAGE	0x0008
+#define EPOW_SENSOR		0x0009
+#define BATTERY_CYCLESTATE	0x000a
+#define BATTERY_CHARGING	0x000b
+
+/* IBM specific sensors */
+#define IBM_SURVEILLANCE	0x2328 /* 9000 */
+#define IBM_FANRPM		0x2329 /* 9001 */
+#define IBM_VOLTAGE		0x232a /* 9002 */
+#define IBM_DRCONNECTOR		0x232b /* 9003 */
+#define IBM_POWERSUPPLY		0x232c /* 9004 */
+#define IBM_INTQUEUE		0x232d /* 9005 */
+
+/* Status return values */
+#define SENSOR_CRITICAL_HIGH	13
+#define SENSOR_WARNING_HIGH	12
+#define SENSOR_NORMAL		11
+#define SENSOR_WARNING_LOW	10
+#define SENSOR_CRITICAL_LOW	 9
+#define SENSOR_SUCCESS		 0
+#define SENSOR_HW_ERROR		-1
+#define SENSOR_BUSY		-2
+#define SENSOR_NOT_EXIST	-3
+#define SENSOR_DR_ENTITY	-9000
+
+/* Location Codes */
+#define LOC_SCSI_DEV_ADDR	'A'
+#define LOC_SCSI_DEV_LOC	'B'
+#define LOC_CPU			'C'
+#define LOC_DISKETTE		'D'
+#define LOC_ETHERNET		'E'
+#define LOC_FAN			'F'
+#define LOC_GRAPHICS		'G'
+/* reserved / not used		'H' */
+#define LOC_IO_ADAPTER		'I'
+/* reserved / not used		'J' */
+#define LOC_KEYBOARD		'K'
+#define LOC_LCD			'L'
+#define LOC_MEMORY		'M'
+#define LOC_NV_MEMORY		'N'
+#define LOC_MOUSE		'O'
+#define LOC_PLANAR		'P'
+#define LOC_OTHER_IO		'Q'
+#define LOC_PARALLEL		'R'
+#define LOC_SERIAL		'S'
+#define LOC_DEAD_RING		'T'
+#define LOC_RACKMOUNTED		'U' /* for _u_nit is rack mounted */
+#define LOC_VOLTAGE		'V'
+#define LOC_SWITCH_ADAPTER	'W'
+#define LOC_OTHER		'X'
+#define LOC_FIRMWARE		'Y'
+#define LOC_SCSI		'Z'
+
+/* Tokens for indicators */
+#define TONE_FREQUENCY		0x0001 /* 0 - 1000 (HZ)*/
+#define TONE_VOLUME		0x0002 /* 0 - 100 (%) */
+#define SYSTEM_POWER_STATE	0x0003 
+#define WARNING_LIGHT		0x0004
+#define DISK_ACTIVITY_LIGHT	0x0005
+#define HEX_DISPLAY_UNIT	0x0006
+#define BATTERY_WARNING_TIME	0x0007
+#define CONDITION_CYCLE_REQUEST	0x0008
+#define SURVEILLANCE_INDICATOR	0x2328 /* 9000 */
+#define DR_ACTION		0x2329 /* 9001 */
+#define DR_INDICATOR		0x232a /* 9002 */
+/* 9003 - 9004: Vendor specific */
+#define GLOBAL_INTERRUPT_QUEUE	0x232d /* 9005 */
+/* 9006 - 9999: Vendor specific */
+
+/* other */
+#define MAX_SENSORS		 17  /* I only know of 17 sensors */    
+#define MAX_LINELENGTH          256
+#define SENSOR_PREFIX		"ibm,sensor-"
+#define cel_to_fahr(x)		((x*9/5)+32)
+
+
+/* Globals */
+static struct proc_dir_entry *proc_rtas;
+static struct rtas_sensors sensors;
+static struct device_node *rtas;
+static unsigned long power_on_time = 0; /* Save the time the user set */
+static char progress_led[MAX_LINELENGTH];
+
+static unsigned long rtas_tone_frequency = 1000;
+static unsigned long rtas_tone_volume = 0;
+
+/* ****************STRUCTS******************************************* */
+struct individual_sensor {
+	unsigned int token;
+	unsigned int quant;
+};
+
+struct rtas_sensors {
+        struct individual_sensor sensor[MAX_SENSORS];
+	unsigned int quant;
+};
+
+/* ****************************************************************** */
+/* Declarations */
+static int ppc_rtas_sensor_read(char * buf, char ** start, off_t off,
+		int count, int *eof, void *data);
+static ssize_t ppc_rtas_clock_read(struct file * file, char * buf, 
+		size_t count, loff_t *ppos);
+static ssize_t ppc_rtas_clock_write(struct file * file, const char * buf, 
+		size_t count, loff_t *ppos);
+static ssize_t ppc_rtas_progress_read(struct file * file, char * buf,
+		size_t count, loff_t *ppos);
+static ssize_t ppc_rtas_progress_write(struct file * file, const char * buf,
+		size_t count, loff_t *ppos);
+static ssize_t ppc_rtas_poweron_read(struct file * file, char * buf,
+		size_t count, loff_t *ppos);
+static ssize_t ppc_rtas_poweron_write(struct file * file, const char * buf,
+		size_t count, loff_t *ppos);
+
+static ssize_t ppc_rtas_tone_freq_write(struct file * file, const char * buf,
+		size_t count, loff_t *ppos);
+static ssize_t ppc_rtas_tone_freq_read(struct file * file, char * buf,
+		size_t count, loff_t *ppos);
+static ssize_t ppc_rtas_tone_volume_write(struct file * file, const char * buf,
+		size_t count, loff_t *ppos);
+static ssize_t ppc_rtas_tone_volume_read(struct file * file, char * buf,
+		size_t count, loff_t *ppos);
+
+struct file_operations ppc_rtas_poweron_operations = {
+	read:		ppc_rtas_poweron_read,
+	write:		ppc_rtas_poweron_write
+};
+struct file_operations ppc_rtas_progress_operations = {
+	read:		ppc_rtas_progress_read,
+	write:		ppc_rtas_progress_write
+};
+
+struct file_operations ppc_rtas_clock_operations = {
+	read:		ppc_rtas_clock_read,
+	write:		ppc_rtas_clock_write
+};
+
+struct file_operations ppc_rtas_tone_freq_operations = {
+	read:		ppc_rtas_tone_freq_read,
+	write:		ppc_rtas_tone_freq_write
+};
+struct file_operations ppc_rtas_tone_volume_operations = {
+	read:		ppc_rtas_tone_volume_read,
+	write:		ppc_rtas_tone_volume_write
+};
+
+int ppc_rtas_find_all_sensors (void);
+int ppc_rtas_process_sensor(struct individual_sensor s, int state, 
+		int error, char * buf);
+char * ppc_rtas_process_error(int error);
+int get_location_code(struct individual_sensor s, char * buf);
+int check_location_string (char *c, char * buf);
+int check_location (char *c, int idx, char * buf);
+
+/* ****************************************************************** */
+/* MAIN                                                               */
+/* ****************************************************************** */
+void proc_rtas_init(void)
+{
+	struct proc_dir_entry *entry;
+
+	rtas = find_devices("rtas");
+	if ((rtas == 0) || (_machine != _MACH_chrp)) {
+		return;
+	}
+	
+	proc_rtas = proc_mkdir("rtas", 0);
+	if (proc_rtas == 0)
+		return;
+
+	/* /proc/rtas entries */
+
+	entry = create_proc_entry("progress", S_IRUGO|S_IWUSR, proc_rtas);
+	if (entry) entry->proc_fops = &ppc_rtas_progress_operations;
+
+	entry = create_proc_entry("clock", S_IRUGO|S_IWUSR, proc_rtas); 
+	if (entry) entry->proc_fops = &ppc_rtas_clock_operations;
+
+	entry = create_proc_entry("poweron", S_IWUSR|S_IRUGO, proc_rtas); 
+	if (entry) entry->proc_fops = &ppc_rtas_poweron_operations;
+
+	create_proc_read_entry("sensors", S_IRUGO, proc_rtas, 
+			ppc_rtas_sensor_read, NULL);
+	
+	entry = create_proc_entry("frequency", S_IWUSR|S_IRUGO, proc_rtas); 
+	if (entry) entry->proc_fops = &ppc_rtas_tone_freq_operations;
+
+	entry = create_proc_entry("volume", S_IWUSR|S_IRUGO, proc_rtas); 
+	if (entry) entry->proc_fops = &ppc_rtas_tone_volume_operations;
+}
+
+/* ****************************************************************** */
+/* POWER-ON-TIME                                                      */
+/* ****************************************************************** */
+static ssize_t ppc_rtas_poweron_write(struct file * file, const char * buf,
+		size_t count, loff_t *ppos)
+{
+	struct rtc_time tm;
+	unsigned long nowtime;
+	char *dest;
+	int error;
+
+	nowtime = simple_strtoul(buf, &dest, 10);
+	if (*dest != '\0' && *dest != '\n') {
+		printk("ppc_rtas_poweron_write: Invalid time\n");
+		return count;
+	}
+	power_on_time = nowtime; /* save the time */
+
+	to_tm(nowtime, &tm);
+
+	error = call_rtas("set-time-for-power-on", 7, 1, NULL, 
+			tm.tm_year, tm.tm_mon, tm.tm_mday, 
+			tm.tm_hour, tm.tm_min, tm.tm_sec, 0 /* nano */);
+	if (error != 0)
+		printk(KERN_WARNING "error: setting poweron time returned: %s\n", 
+				ppc_rtas_process_error(error));
+	return count;
+}
+/* ****************************************************************** */
+static ssize_t ppc_rtas_poweron_read(struct file * file, char * buf,
+		size_t count, loff_t *ppos)
+{
+	int n;
+	if (power_on_time == 0)
+		n = sprintf(buf, "Power on time not set\n");
+	else
+		n = sprintf(buf, "%lu\n", power_on_time);
+
+	if (*ppos >= strlen(buf))
+		return 0;
+	if (n > strlen(buf) - *ppos)
+		n = strlen(buf) - *ppos;
+	if (n > count)
+		n = count;
+	*ppos += n;
+	return n;
+}
+
+/* ****************************************************************** */
+/* PROGRESS                                                           */
+/* ****************************************************************** */
+static ssize_t ppc_rtas_progress_write(struct file * file, const char * buf,
+		size_t count, loff_t *ppos)
+{
+	unsigned long hex;
+
+	strcpy(progress_led, buf); /* save the string */
+	/* Lets see if the user passed hexdigits */
+	hex = simple_strtoul(buf, NULL, 10);
+	
+	ppc_md.progress ((char *)buf, hex);
+	return count;
+
+	/* clear the line */ /* ppc_md.progress("                   ", 0xffff);*/
+}
+/* ****************************************************************** */
+static ssize_t ppc_rtas_progress_read(struct file * file, char * buf,
+		size_t count, loff_t *ppos)
+{
+	int n = 0;
+	if (progress_led != NULL)
+		n = sprintf (buf, "%s\n", progress_led);
+	if (*ppos >= strlen(buf))
+		return 0;
+	if (n > strlen(buf) - *ppos)
+		n = strlen(buf) - *ppos;
+	if (n > count)
+		n = count;
+	*ppos += n;
+	return n;
+}
+
+/* ****************************************************************** */
+/* CLOCK                                                              */
+/* ****************************************************************** */
+static ssize_t ppc_rtas_clock_write(struct file * file, const char * buf, 
+		size_t count, loff_t *ppos)
+{
+	struct rtc_time tm;
+	unsigned long nowtime;
+	char *dest;
+	int error;
+
+	nowtime = simple_strtoul(buf, &dest, 10);
+	if (*dest != '\0' && *dest != '\n') {
+		printk("ppc_rtas_clock_write: Invalid time\n");
+		return count;
+	}
+
+	to_tm(nowtime, &tm);
+	error = call_rtas("set-time-of-day", 7, 1, NULL, 
+			tm.tm_year, tm.tm_mon, tm.tm_mday, 
+			tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
+	if (error != 0)
+		printk(KERN_WARNING "error: setting the clock returned: %s\n", 
+				ppc_rtas_process_error(error));
+	return count;
+}
+/* ****************************************************************** */
+static ssize_t ppc_rtas_clock_read(struct file * file, char * buf, 
+		size_t count, loff_t *ppos)
+{
+	unsigned int year, mon, day, hour, min, sec;
+	unsigned long *ret = kmalloc(4*8, GFP_KERNEL);
+	int n, error;
+
+	error = call_rtas("get-time-of-day", 0, 8, ret);
+	
+	year = ret[0]; mon  = ret[1]; day  = ret[2];
+	hour = ret[3]; min  = ret[4]; sec  = ret[5];
+
+	if (error != 0){
+		printk(KERN_WARNING "error: reading the clock returned: %s\n", 
+				ppc_rtas_process_error(error));
+		n = sprintf (buf, "0");
+	} else { 
+		n = sprintf (buf, "%lu\n", mktime(year, mon, day, hour, min, sec));
+	}
+	kfree(ret);
+
+	if (*ppos >= strlen(buf))
+		return 0;
+	if (n > strlen(buf) - *ppos)
+		n = strlen(buf) - *ppos;
+	if (n > count)
+		n = count;
+	*ppos += n;
+	return n;
+}
+
+/* ****************************************************************** */
+/* SENSOR STUFF                                                       */
+/* ****************************************************************** */
+static int ppc_rtas_sensor_read(char * buf, char ** start, off_t off,
+		int count, int *eof, void *data)
+{
+	int i,j,n;
+	unsigned long ret;
+	int state, error;
+	char buffer[MAX_LINELENGTH*MAX_SENSORS]; /* May not be enough */
+
+	if (count < 0)
+		return -EINVAL;
+
+	n  = sprintf ( buffer  , "RTAS (RunTime Abstraction Services) Sensor Information\n");
+	n += sprintf ( buffer+n, "Sensor\t\tValue\t\tCondition\tLocation\n");
+	n += sprintf ( buffer+n, "********************************************************\n");
+
+	if (ppc_rtas_find_all_sensors() != 0) {
+		n += sprintf ( buffer+n, "\nNo sensors are available\n");
+		goto return_string;
+	}
+
+	for (i=0; i<sensors.quant; i++) {
+		j = sensors.sensor[i].quant;
+		/* A sensor may have multiple instances */
+		while (j >= 0) {
+			error =	call_rtas("get-sensor-state", 2, 2, &ret, 
+				  sensors.sensor[i].token, sensors.sensor[i].quant-j);
+			state = (int) ret;
+			n += ppc_rtas_process_sensor(sensors.sensor[i], state, error, buffer+n );
+			n += sprintf (buffer+n, "\n");
+			j--;
+		} /* while */
+	} /* for */
+
+return_string:
+	if (off >= strlen(buffer)) {
+		*eof = 1;
+		return 0;
+	}
+	if (n > strlen(buffer) - off)
+		n = strlen(buffer) - off;
+	if (n > count)
+		n = count;
+	else
+		*eof = 1;
+	memcpy(buf, buffer + off, n);
+	*start = buf;
+	return n;
+}
+
+/* ****************************************************************** */
+
+int ppc_rtas_find_all_sensors (void)
+{
+	unsigned long *utmp;
+	int len, i, j;
+
+	utmp = (unsigned long *) get_property(rtas, "rtas-sensors", &len);
+	if (utmp == NULL) {
+		printk (KERN_ERR "error: could not get rtas-sensors\n");
+		return 1;
+	}
+
+	sensors.quant = len / 8;      /* int + int */
+
+	for (i=0, j=0; j<sensors.quant; i+=2, j++) {
+		sensors.sensor[j].token = utmp[i];
+		sensors.sensor[j].quant = utmp[i+1];
+	}
+	return 0;
+}
+
+/* ****************************************************************** */
+/*
+ * Builds a string of what rtas returned
+ */
+char * ppc_rtas_process_error(int error)
+{
+	switch (error) {
+		case SENSOR_CRITICAL_HIGH:
+			return "(critical high)";
+		case SENSOR_WARNING_HIGH:
+			return "(warning high)";
+		case SENSOR_NORMAL:
+			return "(normal)";
+		case SENSOR_WARNING_LOW:
+			return "(warning low)";
+		case SENSOR_CRITICAL_LOW:
+			return "(critical low)";
+		case SENSOR_SUCCESS:
+			return "(read ok)";
+		case SENSOR_HW_ERROR:
+			return "(hardware error)";
+		case SENSOR_BUSY:
+			return "(busy)";
+		case SENSOR_NOT_EXIST:
+			return "(non existant)";
+		case SENSOR_DR_ENTITY:
+			return "(dr entity removed)";
+		default:
+			return "(UNKNOWN)";
+	}
+}
+
+/* ****************************************************************** */
+/*
+ * Builds a string out of what the sensor said
+ */
+
+int ppc_rtas_process_sensor(struct individual_sensor s, int state, 
+		int error, char * buf) 
+{
+	/* Defined return vales */
+	const char * key_switch[]        = { "Off\t", "Normal\t", "Secure\t", "Mainenance" };
+	const char * enclosure_switch[]  = { "Closed", "Open" };
+	const char * lid_status[]        = { " ", "Open", "Closed" };
+	const char * power_source[]      = { "AC\t", "Battery", "AC & Battery" };
+	const char * battery_remaining[] = { "Very Low", "Low", "Mid", "High" };
+	const char * epow_sensor[]       = { 
+		"EPOW Reset", "Cooling warning", "Power warning",
+		"System shutdown", "System halt", "EPOW main enclosure",
+		"EPOW power off" };
+	const char * battery_cyclestate[]  = { "None", "In progress", "Requested" };
+	const char * battery_charging[]    = { "Charging", "Discharching", "No current flow" };
+	const char * ibm_drconnector[]     = { "Empty", "Present" };
+	const char * ibm_intqueue[]        = { "Disabled", "Enabled" };
+
+	int have_strings = 0;
+	int temperature = 0;
+	int unknown = 0;
+	int n = 0;
+
+	/* What kind of sensor do we have here? */
+	switch (s.token) {
+		case KEY_SWITCH:
+			n += sprintf(buf+n, "Key switch:\t");
+			n += sprintf(buf+n, "%s\t", key_switch[state]);
+			have_strings = 1;
+			break;
+		case ENCLOSURE_SWITCH:
+			n += sprintf(buf+n, "Enclosure switch:\t");
+			n += sprintf(buf+n, "%s\t", enclosure_switch[state]);
+			have_strings = 1;
+			break;
+		case THERMAL_SENSOR:
+			n += sprintf(buf+n, "Temp. (°C/°F):\t");
+			temperature = 1;
+			break;
+		case LID_STATUS:
+			n += sprintf(buf+n, "Lid status:\t");
+			n += sprintf(buf+n, "%s\t", lid_status[state]);
+			have_strings = 1;
+			break;
+		case POWER_SOURCE:
+			n += sprintf(buf+n, "Power source:\t");
+			n += sprintf(buf+n, "%s\t", power_source[state]);
+			have_strings = 1;
+			break;
+		case BATTERY_VOLTAGE:
+			n += sprintf(buf+n, "Battery voltage:\t");
+			break;
+		case BATTERY_REMAINING:
+			n += sprintf(buf+n, "Battery remaining:\t");
+			n += sprintf(buf+n, "%s\t", battery_remaining[state]);
+			have_strings = 1;
+			break;
+		case BATTERY_PERCENTAGE:
+			n += sprintf(buf+n, "Battery percentage:\t");
+			break;
+		case EPOW_SENSOR:
+			n += sprintf(buf+n, "EPOW Sensor:\t");
+			n += sprintf(buf+n, "%s\t", epow_sensor[state]);
+			have_strings = 1;
+			break;
+		case BATTERY_CYCLESTATE:
+			n += sprintf(buf+n, "Battery cyclestate:\t");
+			n += sprintf(buf+n, "%s\t", battery_cyclestate[state]);
+			have_strings = 1;
+			break;
+		case BATTERY_CHARGING:
+			n += sprintf(buf+n, "Battery Charging:\t");
+			n += sprintf(buf+n, "%s\t", battery_charging[state]);
+			have_strings = 1;
+			break;
+		case IBM_SURVEILLANCE:
+			n += sprintf(buf+n, "Surveillance:\t");
+			break;
+		case IBM_FANRPM:
+			n += sprintf(buf+n, "Fan (rpm):\t");
+			break;
+		case IBM_VOLTAGE:
+			n += sprintf(buf+n, "Voltage (mv):\t");
+			break;
+		case IBM_DRCONNECTOR:
+			n += sprintf(buf+n, "DR connector:\t");
+			n += sprintf(buf+n, "%s\t", ibm_drconnector[state]);
+			have_strings = 1;
+			break;
+		case IBM_POWERSUPPLY:
+			n += sprintf(buf+n, "Powersupply:\t");
+			break;
+		case IBM_INTQUEUE:
+			n += sprintf(buf+n, "Interrupt queue:\t");
+			n += sprintf(buf+n, "%s\t", ibm_intqueue[state]);
+			have_strings = 1;
+			break;
+		default:
+			n += sprintf(buf+n,  "Unkown sensor (type %d), ignoring it\n",
+					s.token);
+			unknown = 1;
+			have_strings = 1;
+			break;
+	}
+	if (have_strings == 0) {
+		if (temperature) {
+			n += sprintf(buf+n, "%4d /%4d\t", state, cel_to_fahr(state));
+		} else
+			n += sprintf(buf+n, "%10d\t", state);
+	}
+	if (unknown == 0) {
+		n += sprintf ( buf+n, "%s\t", ppc_rtas_process_error(error));
+		n += get_location_code(s, buf+n);
+	}
+	return n;
+}
+
+/* ****************************************************************** */
+
+int check_location (char *c, int idx, char * buf)
+{
+	int n = 0;
+
+	switch (*(c+idx)) {
+		case LOC_PLANAR:
+			n += sprintf ( buf, "Planar #%c", *(c+idx+1));
+			break;
+		case LOC_CPU:
+			n += sprintf ( buf, "CPU #%c", *(c+idx+1));
+			break;
+		case LOC_FAN:
+			n += sprintf ( buf, "Fan #%c", *(c+idx+1));
+			break;
+		case LOC_RACKMOUNTED:
+			n += sprintf ( buf, "Rack #%c", *(c+idx+1));
+			break;
+		case LOC_VOLTAGE:
+			n += sprintf ( buf, "Voltage #%c", *(c+idx+1));
+			break;
+		case LOC_LCD:
+			n += sprintf ( buf, "LCD #%c", *(c+idx+1));
+			break;
+		case '.':
+			n += sprintf ( buf, "- %c", *(c+idx+1));
+		default:
+			n += sprintf ( buf, "Unknown location");
+			break;
+	}
+	return n;
+}
+
+
+/* ****************************************************************** */
+/* 
+ * Format: 
+ * ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
+ * the '.' may be an abbrevation
+ */
+int check_location_string (char *c, char *buf)
+{
+	int n=0,i=0;
+
+	while (c[i]) {
+		if (isalpha(c[i]) || c[i] == '.') {
+			 n += check_location(c, i, buf+n);
+		}
+		else if (c[i] == '/' || c[i] == '-')
+			n += sprintf(buf+n, " at ");
+		i++;
+	}
+	return n;
+}
+
+
+/* ****************************************************************** */
+
+int get_location_code(struct individual_sensor s, char * buffer)
+{
+	char rstr[512], tmp[10], tmp2[10];
+	int n=0, i=0, llen, len;
+	/* char *buf = kmalloc(MAX_LINELENGTH, GFP_KERNEL); */
+	char *ret;
+
+	static int pos = 0; /* remember position where buffer was */
+
+	/* construct the sensor number like 0003 */
+	/* fill with zeros */
+	n = sprintf(tmp, "%d", s.token);
+	len = strlen(tmp);
+	while (strlen(tmp) < 4)
+		n += sprintf (tmp+n, "0");
+	
+	/* invert the string */
+	while (tmp[i]) {
+		if (i<len)
+			tmp2[4-len+i] = tmp[i];
+		else
+			tmp2[3-i] = tmp[i];
+		i++;
+	}
+	tmp2[4] = '\0';
+
+	sprintf (rstr, SENSOR_PREFIX"%s", tmp2);
+
+	ret = (char *) get_property(rtas, rstr, &llen);
+
+	n=0;
+	if (ret[0] == '\0')
+		n += sprintf ( buffer+n, "--- ");/* does not have a location */
+	else {
+		char t[50];
+		ret += pos;
+
+		n += check_location_string(ret, buffer + n);
+		n += sprintf ( buffer+n, " ");
+		/* see how many characters we have printed */
+		sprintf ( t, "%s ", ret);
+
+		pos += strlen(t);
+		if (pos >= llen) pos=0;
+	}
+	return n;
+}
+/* ****************************************************************** */
+/* INDICATORS - Tone Frequency                                        */
+/* ****************************************************************** */
+static ssize_t ppc_rtas_tone_freq_write(struct file * file, const char * buf,
+		size_t count, loff_t *ppos)
+{
+	unsigned long freq;
+	char *dest;
+	int error;
+	freq = simple_strtoul(buf, &dest, 10);
+	if (*dest != '\0' && *dest != '\n') {
+		printk("ppc_rtas_tone_freq_write: Invalid tone freqency\n");
+		return count;
+	}
+	if (freq < 0) freq = 0;
+	rtas_tone_frequency = freq; /* save it for later */
+	error = call_rtas("set-indicator", 3, 1, NULL,
+			TONE_FREQUENCY, 0, freq);
+	if (error != 0)
+		printk(KERN_WARNING "error: setting tone frequency returned: %s\n", 
+				ppc_rtas_process_error(error));
+	return count;
+}
+/* ****************************************************************** */
+static ssize_t ppc_rtas_tone_freq_read(struct file * file, char * buf,
+		size_t count, loff_t *ppos)
+{
+	int n;
+	n = sprintf(buf, "%lu\n", rtas_tone_frequency);
+
+	if (*ppos >= strlen(buf))
+		return 0;
+	if (n > strlen(buf) - *ppos)
+		n = strlen(buf) - *ppos;
+	if (n > count)
+		n = count;
+	*ppos += n;
+	return n;
+}
+/* ****************************************************************** */
+/* INDICATORS - Tone Volume                                           */
+/* ****************************************************************** */
+static ssize_t ppc_rtas_tone_volume_write(struct file * file, const char * buf,
+		size_t count, loff_t *ppos)
+{
+	unsigned long volume;
+	char *dest;
+	int error;
+	volume = simple_strtoul(buf, &dest, 10);
+	if (*dest != '\0' && *dest != '\n') {
+		printk("ppc_rtas_tone_volume_write: Invalid tone volume\n");
+		return count;
+	}
+	if (volume < 0) volume = 0;
+	if (volume > 100) volume = 100;
+	
+        rtas_tone_volume = volume; /* save it for later */
+	error = call_rtas("set-indicator", 3, 1, NULL,
+			TONE_VOLUME, 0, volume);
+	if (error != 0)
+		printk(KERN_WARNING "error: setting tone volume returned: %s\n", 
+				ppc_rtas_process_error(error));
+	return count;
+}
+/* ****************************************************************** */
+static ssize_t ppc_rtas_tone_volume_read(struct file * file, char * buf,
+		size_t count, loff_t *ppos)
+{
+	int n;
+	n = sprintf(buf, "%lu\n", rtas_tone_volume);
+
+	if (*ppos >= strlen(buf))
+		return 0;
+	if (n > strlen(buf) - *ppos)
+		n = strlen(buf) - *ppos;
+	if (n > count)
+		n = count;
+	*ppos += n;
+	return n;
+}