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authorBernhard Thaler <bernhard.thaler@r-it.at>2014-09-23 11:01:07 +0200
committerMarcel Holtmann <marcel@holtmann.org>2014-09-23 11:30:04 +0200
commit48e68ff5e55af6907d3f90233e5c4d5601a628a6 (patch)
tree097a24a5cee1a5cb7fcb65f651c1afac0406a28c /net/bluetooth/hci_conn.c
parent5eb596f55cacc2389554a8d7572d90d5e9d4269d (diff)
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@r-it.at> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/hci_conn.c')
-rw-r--r--net/bluetooth/hci_conn.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index e3d7ae9e2edd..22b253750f78 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 */
@@ -207,10 +212,17 @@ 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;