mISDN: Implement MISDN_CTRL_FILL_EMPTY for more drivers
MISDN_CTRL_FILL_EMPTY is a meachanism to send a fixed value (normally silence)
as long no data from upper layers is available. It can be used when recording
voice messages or with unidirectional protocols.
Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/mISDN/hwchannel.c b/drivers/isdn/mISDN/hwchannel.c
index d42ad0e..e541b65 100644
--- a/drivers/isdn/mISDN/hwchannel.c
+++ b/drivers/isdn/mISDN/hwchannel.c
@@ -140,6 +140,8 @@
test_and_clear_bit(FLG_TX_BUSY, &ch->Flags);
test_and_clear_bit(FLG_TX_NEXT, &ch->Flags);
test_and_clear_bit(FLG_ACTIVE, &ch->Flags);
+ test_and_clear_bit(FLG_FILLEMPTY, &ch->Flags);
+ test_and_clear_bit(FLG_TX_EMPTY, &ch->Flags);
ch->minlen = ch->init_minlen;
ch->next_minlen = ch->init_minlen;
ch->maxlen = ch->init_maxlen;
@@ -165,7 +167,15 @@
switch (cq->op) {
case MISDN_CTRL_GETOP:
- cq->op = MISDN_CTRL_RX_BUFFER;
+ cq->op = MISDN_CTRL_RX_BUFFER | MISDN_CTRL_FILL_EMPTY;
+ break;
+ case MISDN_CTRL_FILL_EMPTY:
+ if (cq->p1) {
+ memset(bch->fill, cq->p2 & 0xff, MISDN_BCH_FILL_SIZE);
+ test_and_set_bit(FLG_FILLEMPTY, &bch->Flags);
+ } else {
+ test_and_clear_bit(FLG_FILLEMPTY, &bch->Flags);
+ }
break;
case MISDN_CTRL_RX_BUFFER:
if (cq->p2 > MISDN_CTRL_RX_SIZE_IGNORE)