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Subject[PATCH 07/19] Echo canceler now gets delay information from hardware
From
Date
From: Andreas Eversberg <andreas@eversberg.eu>

Added tx-fifo information for calculation of current delay to sync tx and rx
streams for echo canceler.

Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
---
drivers/isdn/hardware/mISDN/hfc_multi.h | 1 +
drivers/isdn/hardware/mISDN/hfcmulti.c | 8 +++-
drivers/isdn/hardware/mISDN/hfcpci.c | 70 ++++++++++++++++++-------------
drivers/isdn/hardware/mISDN/hfcsusb.c | 4 +-
drivers/isdn/mISDN/dsp.h | 2 +-
drivers/isdn/mISDN/dsp_core.c | 2 +-
drivers/isdn/mISDN/dsp_pipeline.c | 5 +-
drivers/isdn/mISDN/hwchannel.c | 4 +-
include/linux/mISDNdsp.h | 3 +-
include/linux/mISDNhw.h | 2 +-
10 files changed, 60 insertions(+), 41 deletions(-)
diff --git a/drivers/isdn/hardware/mISDN/hfc_multi.h b/drivers/isdn/hardware/mISDN/hfc_multi.h
index b1517dd..8e197e7 100644
--- a/drivers/isdn/hardware/mISDN/hfc_multi.h
+++ b/drivers/isdn/hardware/mISDN/hfc_multi.h
@@ -84,6 +84,7 @@ struct hfc_chan {
int conf; /* conference setting of TX slot */
int txpending; /* if there is currently data in */
/* the FIFO 0=no, 1=yes, 2=splloop */
+ int Zfill; /* rx-fifo level on last hfcmulti_tx */
int rx_off; /* set to turn fifo receive off */
int coeff_count; /* curren coeff block */
s32 *coeff; /* memory pointer to 8 coeff blocks */
diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index 2fbcb92..735d292 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -2075,6 +2075,9 @@ next_frame:
"%d!=%d\n", __func__, hc->id + 1, temp, z2);
z2 = temp; /* repeat unti Z2 is equal */
}
+ hc->chan[ch].Zfill = z1 - z2;
+ if (hc->chan[ch].Zfill < 0)
+ hc->chan[ch].Zfill += hc->Zlen;
Zspace = z2 - z1;
if (Zspace <= 0)
Zspace += hc->Zlen;
@@ -2183,6 +2186,7 @@ next_frame:

/* Have to prep the audio data */
hc->write_fifo(hc, d, ii - i);
+ hc->chan[ch].Zfill += ii - i;
*idxp = ii;

/* if not all data has been written */
@@ -2378,7 +2382,7 @@ next_frame:
if (dch)
recv_Dchannel(dch);
else
- recv_Bchannel(bch);
+ recv_Bchannel(bch, MISDN_ID_ANY);
*sp = skb;
again++;
goto next_frame;
@@ -2410,7 +2414,7 @@ next_frame:
"(z1=%04x, z2=%04x) TRANS\n",
__func__, hc->id + 1, ch, Zsize, z1, z2);
/* only bch is transparent */
- recv_Bchannel(bch);
+ recv_Bchannel(bch, hc->chan[ch].Zfill);
*sp = skb;
}
}
diff --git a/drivers/isdn/hardware/mISDN/hfcpci.c b/drivers/isdn/hardware/mISDN/hfcpci.c
index 641a9cd..60dc925 100644
--- a/drivers/isdn/hardware/mISDN/hfcpci.c
+++ b/drivers/isdn/hardware/mISDN/hfcpci.c
@@ -452,7 +452,7 @@ hfcpci_empty_bfifo(struct bchannel *bch, struct bzfifo *bz,
}
bz->za[new_f2].z2 = cpu_to_le16(new_z2);
bz->f2 = new_f2; /* next buffer */
- recv_Bchannel(bch);
+ recv_Bchannel(bch, MISDN_ID_ANY);
}
}

@@ -541,35 +541,45 @@ receive_dmsg(struct hfc_pci *hc)
* check for transparent receive data and read max one 'poll' size if avail
*/
static void
-hfcpci_empty_fifo_trans(struct bchannel *bch, struct bzfifo *bz, u_char *bdata)
+hfcpci_empty_fifo_trans(struct bchannel *bch, struct bzfifo *rxbz,
+ struct bzfifo *txbz, u_char *bdata)
{
- __le16 *z1r, *z2r;
- int new_z2, fcnt, maxlen;
- u_char *ptr, *ptr1;
+ __le16 *z1r, *z2r, *z1t, *z2t;
+ int new_z2, fcnt_rx, fcnt_tx, maxlen;
+ u_char *ptr, *ptr1;

- z1r = &bz->za[MAX_B_FRAMES].z1; /* pointer to z reg */
+ z1r = &rxbz->za[MAX_B_FRAMES].z1; /* pointer to z reg */
z2r = z1r + 1;
+ z1t = &txbz->za[MAX_B_FRAMES].z1;
+ z2t = z1t + 1;

- fcnt = le16_to_cpu(*z1r) - le16_to_cpu(*z2r);
- if (!fcnt)
+ fcnt_rx = le16_to_cpu(*z1r) - le16_to_cpu(*z2r);
+ if (!fcnt_rx)
return; /* no data avail */

- if (fcnt <= 0)
- fcnt += B_FIFO_SIZE; /* bytes actually buffered */
- new_z2 = le16_to_cpu(*z2r) + fcnt; /* new position in fifo */
+ if (fcnt_rx <= 0)
+ fcnt_rx += B_FIFO_SIZE; /* bytes actually buffered */
+ new_z2 = le16_to_cpu(*z2r) + fcnt_rx; /* new position in fifo */
if (new_z2 >= (B_FIFO_SIZE + B_SUB_VAL))
new_z2 -= B_FIFO_SIZE; /* buffer wrap */

- if (fcnt > MAX_DATA_SIZE) { /* flush, if oversized */
+ if (fcnt_rx > MAX_DATA_SIZE) { /* flush, if oversized */
*z2r = cpu_to_le16(new_z2); /* new position */
return;
}

- bch->rx_skb = mI_alloc_skb(fcnt, GFP_ATOMIC);
+ fcnt_tx = le16_to_cpu(*z2t) - le16_to_cpu(*z1t);
+ if (fcnt_tx <= 0)
+ fcnt_tx += B_FIFO_SIZE;
+ /* fcnt_tx contains available bytes in tx-fifo */
+ fcnt_tx = B_FIFO_SIZE - fcnt_tx;
+ /* remaining bytes to send (bytes in tx-fifo) */
+
+ bch->rx_skb = mI_alloc_skb(fcnt_rx, GFP_ATOMIC);
if (bch->rx_skb) {
- ptr = skb_put(bch->rx_skb, fcnt);
- if (le16_to_cpu(*z2r) + fcnt <= B_FIFO_SIZE + B_SUB_VAL)
- maxlen = fcnt; /* complete transfer */
+ ptr = skb_put(bch->rx_skb, fcnt_rx);
+ if (le16_to_cpu(*z2r) + fcnt_rx <= B_FIFO_SIZE + B_SUB_VAL)
+ maxlen = fcnt_rx; /* complete transfer */
else
maxlen = B_FIFO_SIZE + B_SUB_VAL - le16_to_cpu(*z2r);
/* maximum */
@@ -577,14 +587,14 @@ hfcpci_empty_fifo_trans(struct bchannel *bch, struct bzfifo *bz, u_char *bdata)
ptr1 = bdata + (le16_to_cpu(*z2r) - B_SUB_VAL);
/* start of data */
memcpy(ptr, ptr1, maxlen); /* copy data */
- fcnt -= maxlen;
+ fcnt_rx -= maxlen;

- if (fcnt) { /* rest remaining */
+ if (fcnt_rx) { /* rest remaining */
ptr += maxlen;
ptr1 = bdata; /* start of buffer */
- memcpy(ptr, ptr1, fcnt); /* rest */
+ memcpy(ptr, ptr1, fcnt_rx); /* rest */
}
- recv_Bchannel(bch);
+ recv_Bchannel(bch, fcnt_tx); /* bch, id */
} else
printk(KERN_WARNING "HFCPCI: receive out of memory\n");

@@ -600,26 +610,28 @@ main_rec_hfcpci(struct bchannel *bch)
struct hfc_pci *hc = bch->hw;
int rcnt, real_fifo;
int receive = 0, count = 5;
- struct bzfifo *bz;
+ struct bzfifo *txbz, *rxbz;
u_char *bdata;
struct zt *zp;

if ((bch->nr & 2) && (!hc->hw.bswapped)) {
- bz = &((union fifo_area *)(hc->hw.fifos))->b_chans.rxbz_b2;
+ rxbz = &((union fifo_area *)(hc->hw.fifos))->b_chans.rxbz_b2;
+ txbz = &((union fifo_area *)(hc->hw.fifos))->b_chans.txbz_b2;
bdata = ((union fifo_area *)(hc->hw.fifos))->b_chans.rxdat_b2;
real_fifo = 1;
} else {
- bz = &((union fifo_area *)(hc->hw.fifos))->b_chans.rxbz_b1;
+ rxbz = &((union fifo_area *)(hc->hw.fifos))->b_chans.rxbz_b1;
+ txbz = &((union fifo_area *)(hc->hw.fifos))->b_chans.txbz_b1;
bdata = ((union fifo_area *)(hc->hw.fifos))->b_chans.rxdat_b1;
real_fifo = 0;
}
Begin:
count--;
- if (bz->f1 != bz->f2) {
+ if (rxbz->f1 != rxbz->f2) {
if (bch->debug & DEBUG_HW_BCHANNEL)
printk(KERN_DEBUG "hfcpci rec ch(%x) f1(%d) f2(%d)\n",
- bch->nr, bz->f1, bz->f2);
- zp = &bz->za[bz->f2];
+ bch->nr, rxbz->f1, rxbz->f2);
+ zp = &rxbz->za[rxbz->f2];

rcnt = le16_to_cpu(zp->z1) - le16_to_cpu(zp->z2);
if (rcnt < 0)
@@ -630,8 +642,8 @@ Begin:
"hfcpci rec ch(%x) z1(%x) z2(%x) cnt(%d)\n",
bch->nr, le16_to_cpu(zp->z1),
le16_to_cpu(zp->z2), rcnt);
- hfcpci_empty_bfifo(bch, bz, bdata, rcnt);
- rcnt = bz->f1 - bz->f2;
+ hfcpci_empty_bfifo(bch, rxbz, bdata, rcnt);
+ rcnt = rxbz->f1 - rxbz->f2;
if (rcnt < 0)
rcnt += MAX_B_FRAMES + 1;
if (hc->hw.last_bfifo_cnt[real_fifo] > rcnt + 1) {
@@ -644,7 +656,7 @@ Begin:
else
receive = 0;
} else if (test_bit(FLG_TRANSPARENT, &bch->Flags)) {
- hfcpci_empty_fifo_trans(bch, bz, bdata);
+ hfcpci_empty_fifo_trans(bch, rxbz, txbz, bdata);
return;
} else
receive = 0;
diff --git a/drivers/isdn/hardware/mISDN/hfcsusb.c b/drivers/isdn/hardware/mISDN/hfcsusb.c
index 9c427fb..6b7704c 100644
--- a/drivers/isdn/hardware/mISDN/hfcsusb.c
+++ b/drivers/isdn/hardware/mISDN/hfcsusb.c
@@ -947,7 +947,7 @@ hfcsusb_rx_frame(struct usb_fifo *fifo, __u8 *data, unsigned int len,
if (fifo->dch)
recv_Dchannel(fifo->dch);
if (fifo->bch)
- recv_Bchannel(fifo->bch);
+ recv_Bchannel(fifo->bch, MISDN_ID_ANY);
if (fifo->ech)
recv_Echannel(fifo->ech,
&hw->dch);
@@ -969,7 +969,7 @@ hfcsusb_rx_frame(struct usb_fifo *fifo, __u8 *data, unsigned int len,
} else {
/* deliver transparent data to layer2 */
if (rx_skb->len >= poll)
- recv_Bchannel(fifo->bch);
+ recv_Bchannel(fifo->bch, MISDN_ID_ANY);
}
spin_unlock(&hw->lock);
}
diff --git a/drivers/isdn/mISDN/dsp.h b/drivers/isdn/mISDN/dsp.h
index 0a4a362..4a1c444 100644
--- a/drivers/isdn/mISDN/dsp.h
+++ b/drivers/isdn/mISDN/dsp.h
@@ -262,5 +262,5 @@ extern int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg);
extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data,
int len);
extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data,
- int len);
+ int len, unsigned int txlen);

diff --git a/drivers/isdn/mISDN/dsp_core.c b/drivers/isdn/mISDN/dsp_core.c
index 47dbfe2..e4ddd80 100644
--- a/drivers/isdn/mISDN/dsp_core.c
+++ b/drivers/isdn/mISDN/dsp_core.c
@@ -710,7 +710,7 @@ dsp_function(struct mISDNchannel *ch, struct sk_buff *skb)
/* pipeline */
if (dsp->pipeline.inuse)
dsp_pipeline_process_rx(&dsp->pipeline, skb->data,
- skb->len);
+ skb->len, hh->id);
/* change volume if requested */
if (dsp->rx_volume)
dsp_change_volume(skb, dsp->rx_volume);
diff --git a/drivers/isdn/mISDN/dsp_pipeline.c b/drivers/isdn/mISDN/dsp_pipeline.c
index 18cf87c..ac61f19 100644
--- a/drivers/isdn/mISDN/dsp_pipeline.c
+++ b/drivers/isdn/mISDN/dsp_pipeline.c
@@ -347,7 +347,8 @@ void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data, int len)
entry->elem->process_tx(entry->p, data, len);
}

-void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, int len)
+void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, int len,
+ unsigned int txlen)
{
struct dsp_pipeline_entry *entry;

@@ -356,7 +357,7 @@ void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, int len)

list_for_each_entry_reverse(entry, &pipeline->list, list)
if (entry->elem->process_rx)
- entry->elem->process_rx(entry->p, data, len);
+ entry->elem->process_rx(entry->p, data, len, txlen);
}


diff --git a/drivers/isdn/mISDN/hwchannel.c b/drivers/isdn/mISDN/hwchannel.c
index ab1168a..0481a0c 100644
--- a/drivers/isdn/mISDN/hwchannel.c
+++ b/drivers/isdn/mISDN/hwchannel.c
@@ -185,13 +185,13 @@ recv_Echannel(struct dchannel *ech, struct dchannel *dch)
EXPORT_SYMBOL(recv_Echannel);

void
-recv_Bchannel(struct bchannel *bch)
+recv_Bchannel(struct bchannel *bch, unsigned int id)
{
struct mISDNhead *hh;

hh = mISDN_HEAD_P(bch->rx_skb);
hh->prim = PH_DATA_IND;
- hh->id = MISDN_ID_ANY;
+ hh->id = id;
if (bch->rcount >= 64) {
printk(KERN_WARNING "B-channel %p receive queue overflow, "
"fushing!\n", bch);
diff --git a/include/linux/mISDNdsp.h b/include/linux/mISDNdsp.h
index 9c34061..41d1eeb 100644
--- a/include/linux/mISDNdsp.h
+++ b/include/linux/mISDNdsp.h
@@ -12,7 +12,8 @@ struct mISDN_dsp_element {
void *(*new)(const char *arg);
void (*free)(void *p);
void (*process_tx)(void *p, unsigned char *data, int len);
- void (*process_rx)(void *p, unsigned char *data, int len);
+ void (*process_rx)(void *p, unsigned char *data, int len,
+ unsigned int txlen);
int num_args;
struct mISDN_dsp_element_arg
*args;
diff --git a/include/linux/mISDNhw.h b/include/linux/mISDNhw.h
index 97ffdc1..ce900f4 100644
--- a/include/linux/mISDNhw.h
+++ b/include/linux/mISDNhw.h
@@ -185,7 +185,7 @@ extern int dchannel_senddata(struct dchannel *, struct sk_buff *);
extern int bchannel_senddata(struct bchannel *, struct sk_buff *);
extern void recv_Dchannel(struct dchannel *);
extern void recv_Echannel(struct dchannel *, struct dchannel *);
-extern void recv_Bchannel(struct bchannel *);
+extern void recv_Bchannel(struct bchannel *, unsigned int id);
extern void recv_Dchannel_skb(struct dchannel *, struct sk_buff *);
extern void recv_Bchannel_skb(struct bchannel *, struct sk_buff *);
extern void confirm_Bsend(struct bchannel *bch);
--
1.6.0.2


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