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Message-Id: <1411462867-4010-1-git-send-email-bernhard.thaler@r-it.at>
Date: Tue, 23 Sep 2014 11:01:07 +0200
From: Bernhard Thaler <bernhard.thaler@...t.at>
To: marcel@...tmann.org, gustavo@...ovan.org, johan.hedberg@...il.com,
davem@...emloft.net
Cc: linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
Bernhard Thaler <bernhard.thaler@...t.at>
Subject: [PATCHv4 1/1] bluetooth: Check for SCO type before setting retransmission effort
SCO connection cannot be setup to devices that do not support retransmission.
Patch based on http://permalink.gmane.org/gmane.linux.bluez.kernel/7779 and
adapted for this kernel version.
Code changed to check SCO/eSCO type before setting retransmission effort
and max. latency. The purpose of the patch is to support older devices not
capable of eSCO.
Tested on Blackberry 655+ headset which does not support retransmission.
Credits go to Alexander Sommerhuber.
Signed-off-by: Bernhard Thaler <bernhard.thaler@...t.at>
---
net/bluetooth/hci_conn.c | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index faff624..afa325b 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -38,7 +38,7 @@ struct sco_param {
u16 max_latency;
};
-static const struct sco_param sco_param_cvsd[] = {
+static const struct sco_param esco_param_cvsd[] = {
{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a }, /* S3 */
{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007 }, /* S2 */
{ EDR_ESCO_MASK | ESCO_EV3, 0x0007 }, /* S1 */
@@ -46,6 +46,11 @@ static const struct sco_param sco_param_cvsd[] = {
{ EDR_ESCO_MASK | ESCO_HV1, 0xffff }, /* D0 */
};
+static const struct sco_param sco_param_cvsd[] = {
+ { EDR_ESCO_MASK | ESCO_HV3, 0xffff }, /* D1 */
+ { EDR_ESCO_MASK | ESCO_HV1, 0xffff }, /* D0 */
+};
+
static const struct sco_param sco_param_wideband[] = {
{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d }, /* T2 */
{ EDR_ESCO_MASK | ESCO_EV3, 0x0008 }, /* T1 */
@@ -194,10 +199,17 @@ bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
param = &sco_param_wideband[conn->attempt - 1];
break;
case SCO_AIRMODE_CVSD:
- if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
- return false;
- cp.retrans_effort = 0x01;
- param = &sco_param_cvsd[conn->attempt - 1];
+ if (lmp_esco_capable(conn->link)) {
+ if (conn->attempt > ARRAY_SIZE(esco_param_cvsd))
+ return false;
+ cp.retrans_effort = 0x01;
+ param = &esco_param_cvsd[conn->attempt - 1];
+ } else {
+ if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
+ return false;
+ cp.retrans_effort = 0xff;
+ param = &sco_param_cvsd[conn->attempt - 1];
+ }
break;
default:
return false;
--
1.7.10.4
--
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