From 68f1c21760ec8ff62c2b9e7ba126ac6522871942 Mon Sep 17 00:00:00 2001
From: Shaun Ruffell <sruffell@digium.com>
Date: Tue, 5 May 2009 17:32:29 +0000
Subject: voicebus: Use the companding type on the span when enabling echocan.

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@6564 a0bf4364-ded3-4de4-8d8a-66a801d63aff
---
 drivers/dahdi/voicebus/GpakCust.c | 58 ++++++++++++++++++++++++++++++---------
 1 file changed, 45 insertions(+), 13 deletions(-)

diff --git a/drivers/dahdi/voicebus/GpakCust.c b/drivers/dahdi/voicebus/GpakCust.c
index c1f3c94..76a9b41 100644
--- a/drivers/dahdi/voicebus/GpakCust.c
+++ b/drivers/dahdi/voicebus/GpakCust.c
@@ -212,6 +212,47 @@ static int vpmadt032_setreg(struct vpmadt032 *vpm, unsigned int addr, u16 data)
 	return res;
 }
 
+static int vpmadt032_enable_ec(struct vpmadt032 *vpm, int channel)
+{
+	int res;
+	GPAK_AlgControlStat_t pstatus;
+	GpakAlgCtrl_t control;
+
+	if (vpm->span) {
+		control = (DAHDI_LAW_ALAW == vpm->span->deflaw) ?
+				EnableALawSwCompanding :
+				EnableMuLawSwCompanding;
+	} else {
+		control = EnableMuLawSwCompanding;
+	}
+	printk(KERN_DEBUG "Enabling ecan on channel: %d (%s)\n", channel,
+			((control == EnableMuLawSwCompanding) ?
+			"MuLaw" : "ALaw"));
+	res = gpakAlgControl(vpm->dspid, channel, control, &pstatus);
+	if (res) {
+		printk(KERN_WARNING "Unable to set SW Companding on " \
+			"channel %d (reason %d)\n", channel, res);
+	}
+	res = gpakAlgControl(vpm->dspid, channel, EnableEcanA, &pstatus);
+	return res;
+}
+
+static int vpmadt032_disable_ec(struct vpmadt032 *vpm, int channel)
+{
+	int res;
+	GPAK_AlgControlStat_t pstatus;
+
+	printk(KERN_DEBUG "Disabling ecan on channel: %d\n", channel);
+	res = gpakAlgControl(vpm->dspid, channel, BypassSwCompanding, &pstatus);
+	if (res) {
+		printk(KERN_WARNING "Unable to disable sw companding on " \
+			"echo cancellation channel %d (reason %d)\n",
+			channel, res);
+	}
+	res = gpakAlgControl(vpm->dspid, channel, BypassEcanA, &pstatus);
+	return res;
+}
+
 /**
  * vpmadt032_bh - Changes the echocan parameters on the vpmadt032 module.
  *
@@ -272,19 +313,10 @@ static void vpmadt032_bh(struct work_struct *data)
 			}
 
 		} else if (desiredstate->tap_length != curstate->tap_length) {
-			if (desiredstate->tap_length) {
-				printk(KERN_DEBUG "Enabling ecan on channel: %d\n", channel);
-				res = gpakAlgControl(vpm->dspid, channel, EnableMuLawSwCompanding, &pstatus);
-				if (res)
-					printk("Unable to set SW Companding on channel %d (reason %d)\n", channel, res);
-				res = gpakAlgControl(vpm->dspid, channel, EnableEcanA, &pstatus);
-			} else {
-				printk(KERN_DEBUG "Disabling ecan on channel: %d\n", channel);
-				res = gpakAlgControl(vpm->dspid, channel, BypassSwCompanding, &pstatus);
-				if (res)
-					printk("Unable to disable sw companding on echo cancellation channel %d (reason %d)\n", channel, res);
-				res = gpakAlgControl(vpm->dspid, channel, BypassEcanA, &pstatus);
-			}
+			if (desiredstate->tap_length)
+				res = vpmadt032_enable_ec(vpm, channel);
+			else
+				res = vpmadt032_disable_ec(vpm, channel);
 		}
 vpm_bh_out:
 		if (!res)
-- 
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