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Bluetooth: Add quirk to disable MWS Transport Configuration

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Broadcom 4378/4387 controllers found in Apple Silicon Macs claim to
support getting MWS Transport Layer Configuration,

< HCI Command: Read Local Supported... (0x04|0x0002) plen 0
> HCI Event: Command Complete (0x0e) plen 68
      Read Local Supported Commands (0x04|0x0002) ncmd 1
        Status: Success (0x00)
[...]
          Get MWS Transport Layer Configuration (Octet 30 - Bit 3)]
[...]

, but then don't actually allow the required command:

> HCI Event: Command Complete (0x0e) plen 15
      Get MWS Transport Layer Configuration (0x05|0x000c) ncmd 1
        Status: Command Disallowed (0x0c)
        Number of transports: 0
        Baud rate list: 0 entries
        00 00 00 00 00 00 00 00 00 00

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 22:13:02 +01:00 committed by Luiz Augusto von Dentz
parent 392fca352c
commit ffcb0a445e
3 changed files with 14 additions and 1 deletions
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10
include/net/bluetooth/hci.h
View File

@ -284,6 +284,16 @@ enum {
* during the hdev->setup vendor callback.
*/
HCI_QUIRK_BROKEN_EXT_SCAN,
/*
* When this quirk is set, the HCI_OP_GET_MWS_TRANSPORT_CONFIG command is
* disabled. This is required for some Broadcom controllers which
* erroneously claim to support MWS Transport Layer Configuration.
*
* This quirk can be set before hci_register_dev is called or
* during the hdev->setup vendor callback.
*/
HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG,
};
/* HCI device flags */

3
include/net/bluetooth/hci_core.h
View File

@ -1720,6 +1720,9 @@ void hci_conn_del_sysfs(struct hci_conn *conn);
((dev)->le_features[3] & HCI_LE_CIS_PERIPHERAL)
#define bis_capable(dev) ((dev)->le_features[3] & HCI_LE_ISO_BROADCASTER)
#define mws_transport_config_capable(dev) (((dev)->commands[30] & 0x08) && \
(!test_bit(HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG, &(dev)->quirks)))
/* ----- HCI protocols ----- */
#define HCI_PROTO_DEFER 0x01

2
net/bluetooth/hci_sync.c
View File

@ -4279,7 +4279,7 @@ static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
/* Get MWS transport configuration if the HCI command is supported */
static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
{
if (!(hdev->commands[30] & 0x08))
if (!mws_transport_config_capable(hdev))
return 0;
return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,