powerpc: Merge remaining RTAS code

This moves rtas-proc.c and rtas_flash.c into arch/powerpc/kernel, since
cell wants them as well as pseries (and chrp can use rtas-proc.c too,
at least in principle).  rtas_fw.c is gone, with its bits moved into
rtas_flash.c and rtas.c.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 808 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-proc.c
new file mode 100644
index 000000000000..5bdd5b079d96
--- /dev/null
+++ b/arch/powerpc/kernel/rtas-proc.c
@@ -0,0 +1,808 @@
+/*
+ *   arch/ppc64/kernel/rtas-proc.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 <linux/init.h>
+#include <linux/seq_file.h>
+#include <linux/bitops.h>
+#include <linux/rtc.h>
+
+#include <asm/uaccess.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/rtas.h>
+#include <asm/machdep.h> /* for ppc_md */
+#include <asm/time.h>
+#include <asm/systemcfg.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 */
+
+/* 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 */
+/* 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 rtas_sensors sensors;
+static struct device_node *rtas_node = NULL;
+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_sensors_show(struct seq_file *m, void *v);
+static int ppc_rtas_clock_show(struct seq_file *m, void *v);
+static ssize_t ppc_rtas_clock_write(struct file *file,
+                const char __user *buf, size_t count, loff_t *ppos);
+static int ppc_rtas_progress_show(struct seq_file *m, void *v);
+static ssize_t ppc_rtas_progress_write(struct file *file,
+                const char __user *buf, size_t count, loff_t *ppos);
+static int ppc_rtas_poweron_show(struct seq_file *m, void *v);
+static ssize_t ppc_rtas_poweron_write(struct file *file,
+                const char __user *buf, size_t count, loff_t *ppos);
+
+static ssize_t ppc_rtas_tone_freq_write(struct file *file,
+                const char __user *buf, size_t count, loff_t *ppos);
+static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v);
+static ssize_t ppc_rtas_tone_volume_write(struct file *file,
+                const char __user *buf, size_t count, loff_t *ppos);
+static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v);
+static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v);
+
+static int sensors_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, ppc_rtas_sensors_show, NULL);
+}
+
+struct file_operations ppc_rtas_sensors_operations = {
+        .open           = sensors_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int poweron_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, ppc_rtas_poweron_show, NULL);
+}
+
+struct file_operations ppc_rtas_poweron_operations = {
+        .open           = poweron_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .write          = ppc_rtas_poweron_write,
+        .release        = single_release,
+};
+
+static int progress_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, ppc_rtas_progress_show, NULL);
+}
+
+struct file_operations ppc_rtas_progress_operations = {
+        .open           = progress_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .write          = ppc_rtas_progress_write,
+        .release        = single_release,
+};
+
+static int clock_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, ppc_rtas_clock_show, NULL);
+}
+
+struct file_operations ppc_rtas_clock_operations = {
+        .open           = clock_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .write          = ppc_rtas_clock_write,
+        .release        = single_release,
+};
+
+static int tone_freq_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, ppc_rtas_tone_freq_show, NULL);
+}
+
+struct file_operations ppc_rtas_tone_freq_operations = {
+        .open           = tone_freq_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .write          = ppc_rtas_tone_freq_write,
+        .release        = single_release,
+};
+
+static int tone_volume_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, ppc_rtas_tone_volume_show, NULL);
+}
+
+struct file_operations ppc_rtas_tone_volume_operations = {
+        .open           = tone_volume_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .write          = ppc_rtas_tone_volume_write,
+        .release        = single_release,
+};
+
+static int rmo_buf_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, ppc_rtas_rmo_buf_show, NULL);
+}
+
+struct file_operations ppc_rtas_rmo_buf_ops = {
+        .open           = rmo_buf_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int ppc_rtas_find_all_sensors(void);
+static void ppc_rtas_process_sensor(struct seq_file *m,
+        struct individual_sensor *s, int state, int error, char *loc);
+static char *ppc_rtas_process_error(int error);
+static void get_location_code(struct seq_file *m,
+        struct individual_sensor *s, char *loc);
+static void check_location_string(struct seq_file *m, char *c);
+static void check_location(struct seq_file *m, char *c);
+
+static int __init proc_rtas_init(void)
+{
+        struct proc_dir_entry *entry;
+
+        if (!(systemcfg->platform & PLATFORM_PSERIES))
+                return 1;
+
+        rtas_node = of_find_node_by_name(NULL, "rtas");
+        if (rtas_node == NULL)
+                return 1;
+
+        entry = create_proc_entry("ppc64/rtas/progress", S_IRUGO|S_IWUSR, NULL);
+        if (entry)
+                entry->proc_fops = &ppc_rtas_progress_operations;
+
+        entry = create_proc_entry("ppc64/rtas/clock", S_IRUGO|S_IWUSR, NULL);
+        if (entry)
+                entry->proc_fops = &ppc_rtas_clock_operations;
+
+        entry = create_proc_entry("ppc64/rtas/poweron", S_IWUSR|S_IRUGO, NULL);
+        if (entry)
+                entry->proc_fops = &ppc_rtas_poweron_operations;
+
+        entry = create_proc_entry("ppc64/rtas/sensors", S_IRUGO, NULL);
+        if (entry)
+                entry->proc_fops = &ppc_rtas_sensors_operations;
+
+        entry = create_proc_entry("ppc64/rtas/frequency", S_IWUSR|S_IRUGO,
+                                  NULL);
+        if (entry)
+                entry->proc_fops = &ppc_rtas_tone_freq_operations;
+
+        entry = create_proc_entry("ppc64/rtas/volume", S_IWUSR|S_IRUGO, NULL);
+        if (entry)
+                entry->proc_fops = &ppc_rtas_tone_volume_operations;
+
+        entry = create_proc_entry("ppc64/rtas/rmo_buffer", S_IRUSR, NULL);
+        if (entry)
+                entry->proc_fops = &ppc_rtas_rmo_buf_ops;
+
+        return 0;
+}
+
+__initcall(proc_rtas_init);
+
+static int parse_number(const char __user *p, size_t count, unsigned long *val)
+{
+        char buf[40];
+        char *end;
+
+        if (count > 39)
+                return -EINVAL;
+
+        if (copy_from_user(buf, p, count))
+                return -EFAULT;
+
+        buf[count] = 0;
+
+        *val = simple_strtoul(buf, &end, 10);
+        if (*end && *end != '\n')
+                return -EINVAL;
+
+        return 0;
+}
+
+/* ****************************************************************** */
+/* POWER-ON-TIME                                                      */
+/* ****************************************************************** */
+static ssize_t ppc_rtas_poweron_write(struct file *file,
+                const char __user *buf, size_t count, loff_t *ppos)
+{
+        struct rtc_time tm;
+        unsigned long nowtime;
+        int error = parse_number(buf, count, &nowtime);
+        if (error)
+                return error;
+
+        power_on_time = nowtime; /* save the time */
+
+        to_tm(nowtime, &tm);
+
+        error = rtas_call(rtas_token("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)
+                printk(KERN_WARNING "error: setting poweron time returned: %s\n", 
+                                ppc_rtas_process_error(error));
+        return count;
+}
+/* ****************************************************************** */
+static int ppc_rtas_poweron_show(struct seq_file *m, void *v)
+{
+        if (power_on_time == 0)
+                seq_printf(m, "Power on time not set\n");
+        else
+                seq_printf(m, "%lu\n",power_on_time);
+        return 0;
+}
+
+/* ****************************************************************** */
+/* PROGRESS                                                           */
+/* ****************************************************************** */
+static ssize_t ppc_rtas_progress_write(struct file *file,
+                const char __user *buf, size_t count, loff_t *ppos)
+{
+        unsigned long hex;
+
+        if (count >= MAX_LINELENGTH)
+                count = MAX_LINELENGTH -1;
+        if (copy_from_user(progress_led, buf, count)) { /* save the string */
+                return -EFAULT;
+        }
+        progress_led[count] = 0;
+
+        /* Lets see if the user passed hexdigits */
+        hex = simple_strtoul(progress_led, NULL, 10);
+
+        rtas_progress ((char *)progress_led, hex);
+        return count;
+
+        /* clear the line */
+        /* rtas_progress("                   ", 0xffff);*/
+}
+/* ****************************************************************** */
+static int ppc_rtas_progress_show(struct seq_file *m, void *v)
+{
+        if (progress_led)
+                seq_printf(m, "%s\n", progress_led);
+        return 0;
+}
+
+/* ****************************************************************** */
+/* CLOCK                                                              */
+/* ****************************************************************** */
+static ssize_t ppc_rtas_clock_write(struct file *file,
+                const char __user *buf, size_t count, loff_t *ppos)
+{
+        struct rtc_time tm;
+        unsigned long nowtime;
+        int error = parse_number(buf, count, &nowtime);
+        if (error)
+                return error;
+
+        to_tm(nowtime, &tm);
+        error = rtas_call(rtas_token("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)
+                printk(KERN_WARNING "error: setting the clock returned: %s\n", 
+                                ppc_rtas_process_error(error));
+        return count;
+}
+/* ****************************************************************** */
+static int ppc_rtas_clock_show(struct seq_file *m, void *v)
+{
+        int ret[8];
+        int error = rtas_call(rtas_token("get-time-of-day"), 0, 8, ret);
+
+        if (error) {
+                printk(KERN_WARNING "error: reading the clock returned: %s\n", 
+                                ppc_rtas_process_error(error));
+                seq_printf(m, "0");
+        } else { 
+                unsigned int year, mon, day, hour, min, sec;
+                year = ret[0]; mon  = ret[1]; day  = ret[2];
+                hour = ret[3]; min  = ret[4]; sec  = ret[5];
+                seq_printf(m, "%lu\n",
+                                mktime(year, mon, day, hour, min, sec));
+        }
+        return 0;
+}
+
+/* ****************************************************************** */
+/* SENSOR STUFF                                                       */
+/* ****************************************************************** */
+static int ppc_rtas_sensors_show(struct seq_file *m, void *v)
+{
+        int i,j;
+        int state, error;
+        int get_sensor_state = rtas_token("get-sensor-state");
+
+        seq_printf(m, "RTAS (RunTime Abstraction Services) Sensor Information\n");
+        seq_printf(m, "Sensor\t\tValue\t\tCondition\tLocation\n");
+        seq_printf(m, "********************************************************\n");
+
+        if (ppc_rtas_find_all_sensors() != 0) {
+                seq_printf(m, "\nNo sensors are available\n");
+                return 0;
+        }
+
+        for (i=0; i<sensors.quant; i++) {
+                struct individual_sensor *p = &sensors.sensor[i];
+                char rstr[64];
+                char *loc;
+                int llen, offs;
+
+                sprintf (rstr, SENSOR_PREFIX"%04d", p->token);
+                loc = (char *) get_property(rtas_node, rstr, &llen);
+
+                /* A sensor may have multiple instances */
+                for (j = 0, offs = 0; j <= p->quant; j++) {
+                        error = rtas_call(get_sensor_state, 2, 2, &state, 
+                                          p->token, j);
+
+                        ppc_rtas_process_sensor(m, p, state, error, loc);
+                        seq_putc(m, '\n');
+                        if (loc) {
+                                offs += strlen(loc) + 1;
+                                loc += strlen(loc) + 1;
+                                if (offs >= llen)
+                                        loc = NULL;
+                        }
+                }
+        }
+        return 0;
+}
+
+/* ****************************************************************** */
+
+static int ppc_rtas_find_all_sensors(void)
+{
+        unsigned int *utmp;
+        int len, i;
+
+        utmp = (unsigned int *) get_property(rtas_node, "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; i<sensors.quant; i++) {
+                sensors.sensor[i].token = *utmp++;
+                sensors.sensor[i].quant = *utmp++;
+        }
+        return 0;
+}
+
+/* ****************************************************************** */
+/*
+ * Builds a string of what rtas returned
+ */
+static 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 existent)";
+                case SENSOR_DR_ENTITY:
+                        return "(dr entity removed)";
+                default:
+                        return "(UNKNOWN)";
+        }
+}
+
+/* ****************************************************************** */
+/*
+ * Builds a string out of what the sensor said
+ */
+
+static void ppc_rtas_process_sensor(struct seq_file *m,
+        struct individual_sensor *s, int state, int error, char *loc)
+{
+        /* Defined return vales */
+        const char * key_switch[]        = { "Off\t", "Normal\t", "Secure\t", 
+                                                "Maintenance" };
+        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", "Unusable", 
+                                                "Exchange" };
+
+        int have_strings = 0;
+        int num_states = 0;
+        int temperature = 0;
+        int unknown = 0;
+
+        /* What kind of sensor do we have here? */
+        
+        switch (s->token) {
+                case KEY_SWITCH:
+                        seq_printf(m, "Key switch:\t");
+                        num_states = sizeof(key_switch) / sizeof(char *);
+                        if (state < num_states) {
+                                seq_printf(m, "%s\t", key_switch[state]);
+                                have_strings = 1;
+                        }
+                        break;
+                case ENCLOSURE_SWITCH:
+                        seq_printf(m, "Enclosure switch:\t");
+                        num_states = sizeof(enclosure_switch) / sizeof(char *);
+                        if (state < num_states) {
+                                seq_printf(m, "%s\t", 
+                                                enclosure_switch[state]);
+                                have_strings = 1;
+                        }
+                        break;
+                case THERMAL_SENSOR:
+                        seq_printf(m, "Temp. (C/F):\t");
+                        temperature = 1;
+                        break;
+                case LID_STATUS:
+                        seq_printf(m, "Lid status:\t");
+                        num_states = sizeof(lid_status) / sizeof(char *);
+                        if (state < num_states) {
+                                seq_printf(m, "%s\t", lid_status[state]);
+                                have_strings = 1;
+                        }
+                        break;
+                case POWER_SOURCE:
+                        seq_printf(m, "Power source:\t");
+                        num_states = sizeof(power_source) / sizeof(char *);
+                        if (state < num_states) {
+                                seq_printf(m, "%s\t", 
+                                                power_source[state]);
+                                have_strings = 1;
+                        }
+                        break;
+                case BATTERY_VOLTAGE:
+                        seq_printf(m, "Battery voltage:\t");
+                        break;
+                case BATTERY_REMAINING:
+                        seq_printf(m, "Battery remaining:\t");
+                        num_states = sizeof(battery_remaining) / sizeof(char *);
+                        if (state < num_states)
+                        {
+                                seq_printf(m, "%s\t", 
+                                                battery_remaining[state]);
+                                have_strings = 1;
+                        }
+                        break;
+                case BATTERY_PERCENTAGE:
+                        seq_printf(m, "Battery percentage:\t");
+                        break;
+                case EPOW_SENSOR:
+                        seq_printf(m, "EPOW Sensor:\t");
+                        num_states = sizeof(epow_sensor) / sizeof(char *);
+                        if (state < num_states) {
+                                seq_printf(m, "%s\t", epow_sensor[state]);
+                                have_strings = 1;
+                        }
+                        break;
+                case BATTERY_CYCLESTATE:
+                        seq_printf(m, "Battery cyclestate:\t");
+                        num_states = sizeof(battery_cyclestate) / 
+                                        sizeof(char *);
+                        if (state < num_states) {
+                                seq_printf(m, "%s\t", 
+                                                battery_cyclestate[state]);
+                                have_strings = 1;
+                        }
+                        break;
+                case BATTERY_CHARGING:
+                        seq_printf(m, "Battery Charging:\t");
+                        num_states = sizeof(battery_charging) / sizeof(char *);
+                        if (state < num_states) {
+                                seq_printf(m, "%s\t", 
+                                                battery_charging[state]);
+                                have_strings = 1;
+                        }
+                        break;
+                case IBM_SURVEILLANCE:
+                        seq_printf(m, "Surveillance:\t");
+                        break;
+                case IBM_FANRPM:
+                        seq_printf(m, "Fan (rpm):\t");
+                        break;
+                case IBM_VOLTAGE:
+                        seq_printf(m, "Voltage (mv):\t");
+                        break;
+                case IBM_DRCONNECTOR:
+                        seq_printf(m, "DR connector:\t");
+                        num_states = sizeof(ibm_drconnector) / sizeof(char *);
+                        if (state < num_states) {
+                                seq_printf(m, "%s\t", 
+                                                ibm_drconnector[state]);
+                                have_strings = 1;
+                        }
+                        break;
+                case IBM_POWERSUPPLY:
+                        seq_printf(m, "Powersupply:\t");
+                        break;
+                default:
+                        seq_printf(m,  "Unknown sensor (type %d), ignoring it\n",
+                                        s->token);
+                        unknown = 1;
+                        have_strings = 1;
+                        break;
+        }
+        if (have_strings == 0) {
+                if (temperature) {
+                        seq_printf(m, "%4d /%4d\t", state, cel_to_fahr(state));
+                } else
+                        seq_printf(m, "%10d\t", state);
+        }
+        if (unknown == 0) {
+                seq_printf(m, "%s\t", ppc_rtas_process_error(error));
+                get_location_code(m, s, loc);
+        }
+}
+
+/* ****************************************************************** */
+
+static void check_location(struct seq_file *m, char *c)
+{
+        switch (c[0]) {
+                case LOC_PLANAR:
+                        seq_printf(m, "Planar #%c", c[1]);
+                        break;
+                case LOC_CPU:
+                        seq_printf(m, "CPU #%c", c[1]);
+                        break;
+                case LOC_FAN:
+                        seq_printf(m, "Fan #%c", c[1]);
+                        break;
+                case LOC_RACKMOUNTED:
+                        seq_printf(m, "Rack #%c", c[1]);
+                        break;
+                case LOC_VOLTAGE:
+                        seq_printf(m, "Voltage #%c", c[1]);
+                        break;
+                case LOC_LCD:
+                        seq_printf(m, "LCD #%c", c[1]);
+                        break;
+                case '.':
+                        seq_printf(m, "- %c", c[1]);
+                        break;
+                default:
+                        seq_printf(m, "Unknown location");
+                        break;
+        }
+}
+
+
+/* ****************************************************************** */
+/* 
+ * Format: 
+ * ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
+ * the '.' may be an abbrevation
+ */
+static void check_location_string(struct seq_file *m, char *c)
+{
+        while (*c) {
+                if (isalpha(*c) || *c == '.')
+                        check_location(m, c);
+                else if (*c == '/' || *c == '-')
+                        seq_printf(m, " at ");
+                c++;
+        }
+}
+
+
+/* ****************************************************************** */
+
+static void get_location_code(struct seq_file *m, struct individual_sensor *s, char *loc)
+{
+        if (!loc || !*loc) {
+                seq_printf(m, "---");/* does not have a location */
+        } else {
+                check_location_string(m, loc);
+        }
+        seq_putc(m, ' ');
+}
+/* ****************************************************************** */
+/* INDICATORS - Tone Frequency                                        */
+/* ****************************************************************** */
+static ssize_t ppc_rtas_tone_freq_write(struct file *file,
+                const char __user *buf, size_t count, loff_t *ppos)
+{
+        unsigned long freq;
+        int error = parse_number(buf, count, &freq);
+        if (error)
+                return error;
+
+        rtas_tone_frequency = freq; /* save it for later */
+        error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
+                        TONE_FREQUENCY, 0, freq);
+        if (error)
+                printk(KERN_WARNING "error: setting tone frequency returned: %s\n", 
+                                ppc_rtas_process_error(error));
+        return count;
+}
+/* ****************************************************************** */
+static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v)
+{
+        seq_printf(m, "%lu\n", rtas_tone_frequency);
+        return 0;
+}
+/* ****************************************************************** */
+/* INDICATORS - Tone Volume                                           */
+/* ****************************************************************** */
+static ssize_t ppc_rtas_tone_volume_write(struct file *file,
+                const char __user *buf, size_t count, loff_t *ppos)
+{
+        unsigned long volume;
+        int error = parse_number(buf, count, &volume);
+        if (error)
+                return error;
+
+        if (volume > 100)
+                volume = 100;
+        
+        rtas_tone_volume = volume; /* save it for later */
+        error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
+                        TONE_VOLUME, 0, volume);
+        if (error)
+                printk(KERN_WARNING "error: setting tone volume returned: %s\n", 
+                                ppc_rtas_process_error(error));
+        return count;
+}
+/* ****************************************************************** */
+static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v)
+{
+        seq_printf(m, "%lu\n", rtas_tone_volume);
+        return 0;
+}
+
+#define RMO_READ_BUF_MAX 30
+
+/* RTAS Userspace access */
+static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v)
+{
+        seq_printf(m, "%016lx %x\n", rtas_rmo_buf, RTAS_RMOBUF_MAX);
+        return 0;
+}