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Bluetooth: Add quirk to disable extended scanning 

Broadcom 4377 controllers found in Apple x86 Macs with the T2 chip
claim to support extended scanning when querying supported states,

< HCI Command: LE Read Supported St.. (0x08|0x001c) plen 0
> HCI Event: Command Complete (0x0e) plen 12
      LE Read Supported States (0x08|0x001c) ncmd 1
        Status: Success (0x00)
        States: 0x000003ffffffffff
[...]
          LE Set Extended Scan Parameters (Octet 37 - Bit 5)
          LE Set Extended Scan Enable (Octet 37 - Bit 6)
[...]

, but then fail to actually implement the extended scanning:

< HCI Command: LE Set Extended Sca.. (0x08|0x0041) plen 8
        Own address type: Random (0x01)
        Filter policy: Accept all advertisement (0x00)
        PHYs: 0x01
        Entry 0: LE 1M
          Type: Active (0x01)
          Interval: 11.250 msec (0x0012)
          Window: 11.250 msec (0x0012)
> HCI Event: Command Complete (0x0e) plen 4
      LE Set Extended Scan Parameters (0x08|0x0041) ncmd 1
        Status: Unknown HCI Command (0x01)

Signed-off-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Sven Peter 2022-11-04 22:13:01 +01:00 committed by Luiz Augusto von Dentz
parent ad38e55e1c
commit 392fca352c
2 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
include/net/bluetooth/hci.h
View File

@ -274,6 +274,16 @@ enum {
* during the hdev->setup vendor callback.
*/
HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN,
/*
* When this quirk is set, the HCI_OP_LE_SET_EXT_SCAN_ENABLE command is
* disabled. This is required for some Broadcom controllers which
* erroneously claim to support extended scanning.
*
* This quirk can be set before hci_register_dev is called or
* during the hdev->setup vendor callback.
*/
HCI_QUIRK_BROKEN_EXT_SCAN,
};
/* HCI device flags */

4
include/net/bluetooth/hci_core.h
View File

@ -1690,7 +1690,9 @@ void hci_conn_del_sysfs(struct hci_conn *conn);
/* Use ext scanning if set ext scan param and ext scan enable is supported */
#define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \
((dev)->commands[37] & 0x40))
((dev)->commands[37] & 0x40) && \
!test_bit(HCI_QUIRK_BROKEN_EXT_SCAN, &(dev)->quirks))
/* Use ext create connection if command is supported */
#define use_ext_conn(dev) ((dev)->commands[37] & 0x80)