drivers/bluetooth/btintel.c

Source file repositories/reference/linux-study-clean/drivers/bluetooth/btintel.c

File Facts

System
Linux kernel
Corpus path
drivers/bluetooth/btintel.c
Extension
.c
Size
102794 bytes
Lines
3882
Domain
Driver Families
Bucket
drivers/bluetooth
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct cmd_write_boot_params {
	__le32 boot_addr;
	u8  fw_build_num;
	u8  fw_build_ww;
	u8  fw_build_yy;
} __packed;

static struct {
	const char *driver_name;
	u8         hw_variant;
	u32        fw_build_num;
} coredump_info;

const guid_t btintel_guid_dsm =
	GUID_INIT(0xaa10f4e0, 0x81ac, 0x4233,
		  0xab, 0xf6, 0x3b, 0x2a, 0xc5, 0x0e, 0x28, 0xd9);
EXPORT_SYMBOL_GPL(btintel_guid_dsm);

int btintel_check_bdaddr(struct hci_dev *hdev)
{
	struct hci_rp_read_bd_addr *bda;
	struct sk_buff *skb;

	skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
			     HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
		int err = PTR_ERR(skb);
		bt_dev_err(hdev, "Reading Intel device address failed (%d)",
			   err);
		return err;
	}

	if (skb->len != sizeof(*bda)) {
		bt_dev_err(hdev, "Intel device address length mismatch");
		kfree_skb(skb);
		return -EIO;
	}

	bda = (struct hci_rp_read_bd_addr *)skb->data;

	/* For some Intel based controllers, the default Bluetooth device
	 * address 00:03:19:9E:8B:00 can be found. These controllers are
	 * fully operational, but have the danger of duplicate addresses
	 * and that in turn can cause problems with Bluetooth operation.
	 */
	if (!bacmp(&bda->bdaddr, BDADDR_INTEL)) {
		bt_dev_err(hdev, "Found Intel default device address (%pMR)",
			   &bda->bdaddr);
		hci_set_quirk(hdev, HCI_QUIRK_INVALID_BDADDR);
	}

	kfree_skb(skb);

	return 0;
}
EXPORT_SYMBOL_GPL(btintel_check_bdaddr);

int btintel_enter_mfg(struct hci_dev *hdev)
{
	static const u8 param[] = { 0x01, 0x00 };
	struct sk_buff *skb;

	skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_CMD_TIMEOUT);
	if (IS_ERR(skb)) {
		bt_dev_err(hdev, "Entering manufacturer mode failed (%ld)",
			   PTR_ERR(skb));
		return PTR_ERR(skb);
	}
	kfree_skb(skb);

	return 0;
}
EXPORT_SYMBOL_GPL(btintel_enter_mfg);

int btintel_exit_mfg(struct hci_dev *hdev, bool reset, bool patched)
{
	u8 param[] = { 0x00, 0x00 };
	struct sk_buff *skb;

	/* The 2nd command parameter specifies the manufacturing exit method:
	 * 0x00: Just disable the manufacturing mode (0x00).
	 * 0x01: Disable manufacturing mode and reset with patches deactivated.
	 * 0x02: Disable manufacturing mode and reset with patches activated.
	 */
	if (reset)
		param[1] |= patched ? 0x02 : 0x01;

	skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_CMD_TIMEOUT);
	if (IS_ERR(skb)) {
		bt_dev_err(hdev, "Exiting manufacturer mode failed (%ld)",

Annotation

Implementation Notes