diff options
| author | Matthias Kaehlcke <mka@chromium.org> | 2019-02-19 12:05:57 -0800 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2019-02-26 10:08:26 +0100 |
| commit | 7a0e5b15ca458dd47e4c60b7fa9f22b84c7068c7 (patch) | |
| tree | b53af310c8a2731da2566228974da53446ca8b9b /net/bluetooth/hci_core.c | |
| parent | 56897b217a1d0a91c9920cb418d6b3fe922f590a (diff) | |
Bluetooth: Add quirk for reading BD_ADDR from fwnode property
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>
Diffstat (limited to 'net/bluetooth/hci_core.c')
| -rw-r--r-- | net/bluetooth/hci_core.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 26e3d36aee29..d6b2540ba7f8 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -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 @@ done: 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. * |