diff options
| author | Karsten Keil <kkeil@linux-pingi.de> | 2012-05-16 03:51:07 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-16 23:24:05 +0400 |
| commit | 6d1ee48fd0d8d2586aaeda24dacffc426c2be44a (patch) | |
| tree | 0a94204bfdf5ac0eb4d03885cb2f87ddb0e8eb1a /drivers/isdn/mISDN/hwchannel.c | |
| parent | 034005a0119b9c2aabe0ac3953eb9a65ca937a69 (diff) | |
| download | linux-6d1ee48fd0d8d2586aaeda24dacffc426c2be44a.tar.xz | |
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>
Diffstat (limited to 'drivers/isdn/mISDN/hwchannel.c')
| -rw-r--r-- | drivers/isdn/mISDN/hwchannel.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/isdn/mISDN/hwchannel.c b/drivers/isdn/mISDN/hwchannel.c index d42ad0e98de3..e541b65f68ba 100644 --- a/drivers/isdn/mISDN/hwchannel.c +++ b/drivers/isdn/mISDN/hwchannel.c @@ -140,6 +140,8 @@ mISDN_clear_bchannel(struct bchannel *ch) 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 @@ mISDN_ctrl_bchannel(struct bchannel *bch, struct mISDN_ctrl_req *cq) 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) |