Op 05-03-19 om 14:09 schreef Stephan Gerhold:
BCM2076B1 appears to use 20:76:A0:00:56:79 as default address.
This address is used by at least 5 devices with the AMPAK AP6476
module and is also suspicious because it starts with the chip name
2076 (followed by a different revision A0 for some reason).
With BCM43340 (Edison) it's the same principle. With the fake address I
found everything (in user space) seems to work except PAN/NAP (bnep) and
no decent error message anywhere making this quite hard to debug.
Add it to the list of default addresses and leave it up to the
user to configure a valid one.
Which way is the user supposed to configure the valid one?
The only way I found is bd_addr (tool from bluez that is not normally
built/installed).
Using this tool requires hci0 to be up and bluetoothd to be restarted if
that was already running, which is quite inconvenient.
I also saw there was a patch to put the address in dt.
But nowhere did I find a kernel parameter to pass the address. Did I
miss something?
Signed-off-by: Stephan Gerhold <stephan@xxxxxxxxxxx>
---
drivers/bluetooth/btbcm.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c
index ea1a20a49f91..35394076267b 100644
--- a/drivers/bluetooth/btbcm.c
+++ b/drivers/bluetooth/btbcm.c
@@ -34,6 +34,7 @@
#define BDADDR_BCM20702A0 (&(bdaddr_t) {{0x00, 0xa0, 0x02, 0x70, 0x20,
0x00}})
#define BDADDR_BCM20702A1 (&(bdaddr_t) {{0x00, 0x00, 0xa0, 0x02, 0x70,
0x20}})
+#define BDADDR_BCM2076B1 (&(bdaddr_t) {{0x79, 0x56, 0x00, 0xa0, 0x76,
0x20}})
#define BDADDR_BCM43430A0 (&(bdaddr_t) {{0xac, 0x1f, 0x12, 0xa0, 0x43,
0x43}})
#define BDADDR_BCM4324B3 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb3, 0x24,
0x43}})
#define BDADDR_BCM4330B1 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb1, 0x30,
0x43}})
@@ -69,6 +70,9 @@ int btbcm_check_bdaddr(struct hci_dev *hdev)
* The address 20:70:02:A0:00:00 indicates a BCM20702A1 controller
* with no configured address.
*
+ * The address 20:76:A0:00:56:79 indicates a BCM2076B1 controller
+ * with no configured address.
+ *
* The address 43:24:B3:00:00:00 indicates a BCM4324B3 controller
* with waiting for configuration state.
*
@@ -80,6 +84,7 @@ int btbcm_check_bdaddr(struct hci_dev *hdev)
*/
if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0) ||
!bacmp(&bda->bdaddr, BDADDR_BCM20702A1) ||
+ !bacmp(&bda->bdaddr, BDADDR_BCM2076B1) ||
!bacmp(&bda->bdaddr, BDADDR_BCM4324B3) ||
!bacmp(&bda->bdaddr, BDADDR_BCM4330B1) ||
!bacmp(&bda->bdaddr, BDADDR_BCM43430A0)) {
