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Bluetooth: Add quirk for reading BD_ADDR from fwnode property

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Add HCI_QUIRK_USE_BDADDR_PROPERTY to allow controllers to retrieve
the public Bluetooth address from the firmware node property
'local-bd-address'. If quirk is set and the property does not exist
or is invalid the controller is marked as unconfigured.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
Tested-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Matthias Kaehlcke 2019-02-19 12:05:57 -08:00 committed by Marcel Holtmann
parent 56897b217a
commit 7a0e5b15ca
3 changed files with 59 additions and 2 deletions
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12
include/net/bluetooth/hci.h
View File

@ -158,6 +158,18 @@ enum {
*/
HCI_QUIRK_INVALID_BDADDR,
/* When this quirk is set, the public Bluetooth address
* initially reported by HCI Read BD Address command
* is considered invalid. The public BD Address can be
* specified in the fwnode property 'local-bd-address'.
* If this property does not exist or is invalid controller
* configuration is required before this device can be used.
*
* This quirk can be set before hci_register_dev is called or
* during the hdev->setup vendor callback.
*/
HCI_QUIRK_USE_BDADDR_PROPERTY,
/* When this quirk is set, the duplicate filtering during
* scanning is based on Bluetooth devices addresses. To allow
* RSSI based updates, restart scanning if needed.

43
net/bluetooth/hci_core.c
View File

@ -30,6 +30,7 @@
#include <linux/rfkill.h>
#include <linux/debugfs.h>
#include <linux/crypto.h>
#include <linux/property.h>
#include <asm/unaligned.h>
#include <net/bluetooth/bluetooth.h>
@ -1355,6 +1356,32 @@ int hci_inquiry(void __user *arg)
return err;
}
/**
* hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
* (BD_ADDR) for a HCI device from
* a firmware node property.
* @hdev: The HCI device
*
* Search the firmware node for 'local-bd-address'.
*
* All-zero BD addresses are rejected, because those could be properties
* that exist in the firmware tables, but were not updated by the firmware. For
* example, the DTS could define 'local-bd-address', with zero BD addresses.
*/
static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
{
struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
bdaddr_t ba;
int ret;
ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
(u8 *)&ba, sizeof(ba));
if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
return;
bacpy(&hdev->public_addr, &ba);
}
static int hci_dev_do_open(struct hci_dev *hdev)
{
int ret = 0;
@ -1422,6 +1449,22 @@ static int hci_dev_do_open(struct hci_dev *hdev)
if (hdev->setup)
ret = hdev->setup(hdev);
if (ret)
goto setup_failed;
if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
if (!bacmp(&hdev->public_addr, BDADDR_ANY))
hci_dev_get_bd_addr_from_property(hdev);
if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
hdev->set_bdaddr)
ret = hdev->set_bdaddr(hdev,
&hdev->public_addr);
else
ret = -EADDRNOTAVAIL;
}
setup_failed:
/* The transport driver can set these quirks before
* creating the HCI device or in its setup callback.
*

6
net/bluetooth/mgmt.c
View File

@ -549,7 +549,8 @@ static bool is_configured(struct hci_dev *hdev)
!hci_dev_test_flag(hdev, HCI_EXT_CONFIGURED))
return false;
if (test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) &&
if ((test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) &&
!bacmp(&hdev->public_addr, BDADDR_ANY))
return false;
@ -564,7 +565,8 @@ static __le32 get_missing_options(struct hci_dev *hdev)
!hci_dev_test_flag(hdev, HCI_EXT_CONFIGURED))
options |= MGMT_OPTION_EXTERNAL_CONFIG;
if (test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) &&
if ((test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) &&
!bacmp(&hdev->public_addr, BDADDR_ANY))
options |= MGMT_OPTION_PUBLIC_ADDRESS;