For the Apple Bluetooth devices that are Broadcom based, it makes sense
to read the chip information. It is a single HCI command and might help
gathering more information about these devices.
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
---
drivers/bluetooth/btusb.c | 38 +++++++++++++++++++++++++++++++++++++-
1 file changed, 37 insertions(+), 1 deletion(-)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 1521dad3d460..9bf4d6ae6c6b 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -24,6 +24,7 @@
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/firmware.h>
+#include <asm/unaligned.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@@ -53,6 +54,7 @@ static struct usb_driver btusb_driver;
#define BTUSB_INTEL_NEW 0x2000
#define BTUSB_AMP 0x4000
#define BTUSB_QCA_ROME 0x8000
+#define BTUSB_BCM_APPLE 0x10000
static const struct usb_device_id btusb_table[] = {
/* Generic Bluetooth USB device */
@@ -62,7 +64,8 @@ static const struct usb_device_id btusb_table[] = {
{ USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },
/* Apple-specific (Broadcom) devices */
- { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01) },
+ { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),
+ .driver_info = BTUSB_BCM_APPLE },
/* MediaTek MT76x0E */
{ USB_DEVICE(0x0e8d, 0x763f) },
@@ -2634,6 +2637,34 @@ static int btusb_set_bdaddr_bcm(struct hci_dev *hdev, const bdaddr_t *bdaddr)
return 0;
}
+static int btusb_setup_bcm_apple(struct hci_dev *hdev)
+{
+ struct sk_buff *skb;
+ int err;
+
+ /* Read Verbose Config Version Info */
+ skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ BT_ERR("%s: BCM: Read Verbose Version failed (%d)",
+ hdev->name, err);
+ return err;
+ }
+
+ if (skb->len != 7) {
+ BT_ERR("%s: BCM: Read Verbose Version event length mismatch",
+ hdev->name);
+ kfree_skb(skb);
+ return -EIO;
+ }
+
+ BT_INFO("%s: BCM: chip id %u build %4.4u", hdev->name, skb->data[1],
+ get_unaligned_le16(skb->data + 5));
+ kfree_skb(skb);
+
+ return 0;
+}
+
static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
const bdaddr_t *bdaddr)
{
@@ -3033,6 +3064,11 @@ static int btusb_probe(struct usb_interface *intf,
set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
}
+ if (id->driver_info & BTUSB_BCM_APPLE) {
+ hdev->setup = btusb_setup_bcm_apple;
+ set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
+ }
+
if (id->driver_info & BTUSB_INTEL) {
hdev->setup = btusb_setup_intel;
hdev->shutdown = btusb_shutdown_intel;
--
2.1.0
--
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