tsalarm(7D) Devices tsalarm(7D)NAMEtsalarm - Alarm device driver
SYNOPSIS
tsalarm@0:ctl
DESCRIPTION
The tsalarm driver is a Multi-threaded, loadable non-STREAMS pseudo
driver that manages ALOM alarms. The tsalarm driver provides an inter‐
face through which alarm relays can be controlled on SUNW,Netra-240 and
SUNW,Netra-440 platforms.
HARDWARE INTERFACE
The alarm hardware differs depending on platform. The Netra 240 and 440
platforms features four dry contact alarm relays which are con‐
trolled by ALOM. You can set each alarm to "on" or "off" by using
ioctl interfaces provided from the host. The four alarms are labeled as
"critical," "major," "minor," and "user." The user alarm is set by a
user application depending on system condition. LED's in front of the
box provide a visual indication of the four alarms. The number of
alarms and their meanings/labels may vary across platforms.
IOCTLS
The interface provided by the tsalarm driver comprises ioctls that
enable applications to manipulate the alarm module. The alarm module
is accessed via two device nodes: i) /dev/lom and /dev/tsalarm:ctl.
The following ioctls are supported by the /dev/lom and
/dev/tsalarm:ctl devices:
TSIOCALCTL - Turn an alarm on or off.
The argument is a pointer to the ts_aldata_t/lom_aldata_t struc‐
ture. This structure is described below. alarm_no member is an
integer which specifies the alarm to which the command is to be
applied. The alarm_state/state structure member indicates the state
to which the alarm should be set (where 0 == off). An error (EIN‐
VAL) is returned if either an invalid alarm_no or invalid
alarm_state is provided.
TSIOCALSTATE - Get the state of the alarms.
The argument is a pointer to the ts_aldata_t/lom_aldata_t struc‐
ture. This structure is described below. alarm_no member is an
integer which indicates the alarm to which the command will be
applied. The alarm_state member holds the alarm's current state
and is filled in by the driver. A zero indicates that the alarm is
off. An error (EINVAL) is returned if an invalid alarm_no is pro‐
vided. The structures and definitions for the values are defined
below.
Alarm values:
The following old style values are defined in <lom.io.h>
#define ALARM_NUM_0 0 /* number of zero'th alarm */
#define ALARM_NUM_1 1 /* number of first alarm */
#define ALARM_NUM_2 2 /* number of second alarm */
#define ALARM_NUM_3 3 /* number of third alarm */
Alarm values defined in <lom.io.h>
#define ALARM_OFF 0 /* Turn off alarm */
#define ALARM_ON 1 /* Turn on alarm */
Alarm Data Structure:
This structure is defined in <lom.io.h>
typedef struct {
int alarm_no; /* alarm to apply command to */
int alarm_state; /* state of alarm (0 == off) */
} ts_aldata_t;
Use the following LOM interfaces to get and set the alarms. These defi‐
nitions are included in <lom_io.h>
#define ALARM_CRITICAL 0 /* number of critical alarm */
#define ALARM_MAJOR 1 /* number of major alarm */
#define ALARM_MINOR 2 /* number of minor alarm */
#define ALARM_USER 3 /* number of user alarm */
The following alarm data structure is provided in <lom_io.h>:
typedef struct {
int alarm_no;
int state;
} lom_aldata_t;
ERRORS
An open() will fail if:
ENXIO The driver is not installed in the system.
An ioctl() will fail if:
EFAULT There was a hardware failure during the speci‐
fied operation.
EINVAL The alarm number specified is not valid or an
invalid value was supplied.
ENXIO The driver is not installed in the system or
the monitor callback routine could not be
scheduled.
EXAMPLES
How to set an alarm:
#include <sys/unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <lom_io.h>
#define LOM_DEVICE "/dev/lom"
int
main()
{
lom_aldata_t lld;
int fd = open(LOM_DEVICE, O_RDWR);
if (fd == -1) {
printf("Error opening device: %s0, LOM_DEVICE);
exit (1);
}
lld.alarm_no = ALARM_CRITICAL; /* Set the critical alarm */
lld.state = ALARM_ON; /* Set the alarm */
if (ioctl(fd, LOMIOCALCTL, (char *)&lld) != 0)
printf("Setting alarm failed");
else
printf("Alarm set successfully");
close(fd);
}
FILES
/dev/lom
LOM device.
/dev/tsalarm:ctl
Alarm control device.
/platform/platform/kernel/drv/sparcv9/tsalarm
Device driver module.
/platform/SUNW,Netra-240/kernel/drv/tsalarm.conf
Driver configuration file.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWcarx.u │
├─────────────────────────────┼─────────────────────────────┤
│Architecture │SPARC │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOattributes(5)
Writing Device Drivers
SunOS 5.10 16 Mar 2004 tsalarm(7D)
