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sysfs: add 'lineconfig' attribute to span 

This patch exposes the span 'lineconfig' via sysfs: textual representation
of the framing and coding of the span.

This is needed in order for the Dahdi perl classes (in tools) to get
the inforamtion for e.g. dahdi_genconf to work without the guesswork of
parsing /proc/dahdi .

Signed-off-by: Oron Peled <oron.peled@xorcom.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Acked-by: Shaun Ruffell <sruffell@digium.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10461 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This commit is contained in:
Oron Peled 2012-02-22 12:10:59 +00:00 committed by Tzafrir Cohen
parent 84b9b4c84a
commit 3df0b7aedc
2 changed files with 36 additions and 0 deletions
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6
README
View File

@ -802,6 +802,12 @@ A free-form description of the span.
===== /sys/bus/dahdi_spans/devices/span-N/lbo
LBO setting for the channel.
===== /sys/bus/dahdi_spans/devices/span-N/lineconfig
The framing and coding of the span, for a digital span. Textual
represenation:
<B8ZS|AMI|HDB3>/<D4|ESF|CCS>[/CRC4]
===== /sys/bus/dahdi_spans/devices/span-N/local_spanno
The number of the span within the DAHDI device.

30
drivers/dahdi/dahdi-sysfs.c
View File

@ -259,6 +259,35 @@ static BUS_ATTR_READER(channels_show, dev, buf)
return sprintf(buf, "%d\n", span->channels);
}
static BUS_ATTR_READER(lineconfig_show, dev, buf)
{
struct dahdi_span *span;
int len = 0;
span = dev_to_span(dev);
if (span->lineconfig) {
/* framing first */
if (span->lineconfig & DAHDI_CONFIG_B8ZS)
len += sprintf(buf + len, "B8ZS/");
else if (span->lineconfig & DAHDI_CONFIG_AMI)
len += sprintf(buf + len, "AMI/");
else if (span->lineconfig & DAHDI_CONFIG_HDB3)
len += sprintf(buf + len, "HDB3/");
/* then coding */
if (span->lineconfig & DAHDI_CONFIG_ESF)
len += sprintf(buf + len, "ESF");
else if (span->lineconfig & DAHDI_CONFIG_D4)
len += sprintf(buf + len, "D4");
else if (span->lineconfig & DAHDI_CONFIG_CCS)
len += sprintf(buf + len, "CCS");
/* E1's can enable CRC checking */
if (span->lineconfig & DAHDI_CONFIG_CRC4)
len += sprintf(buf + len, "/CRC4");
}
len += sprintf(buf + len, "\n");
return len;
}
static struct device_attribute span_dev_attrs[] = {
__ATTR_RO(name),
__ATTR_RO(desc),
@ -271,6 +300,7 @@ static struct device_attribute span_dev_attrs[] = {
__ATTR_RO(is_sync_master),
__ATTR_RO(basechan),
__ATTR_RO(channels),
__ATTR_RO(lineconfig),
__ATTR_NULL,
};