1 /* 2 * 3 * Bluetooth support for Intel devices 4 * 5 * Copyright (C) 2015 Intel Corporation 6 * 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <linux/module.h> 25 26 #include <net/bluetooth/bluetooth.h> 27 #include <net/bluetooth/hci_core.h> 28 29 #include "btintel.h" 30 31 #define VERSION "0.1" 32 33 #define BDADDR_INTEL (&(bdaddr_t) {{0x00, 0x8b, 0x9e, 0x19, 0x03, 0x00}}) 34 35 int btintel_check_bdaddr(struct hci_dev *hdev) 36 { 37 struct hci_rp_read_bd_addr *bda; 38 struct sk_buff *skb; 39 40 skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL, 41 HCI_INIT_TIMEOUT); 42 if (IS_ERR(skb)) { 43 int err = PTR_ERR(skb); 44 BT_ERR("%s: Reading Intel device address failed (%d)", 45 hdev->name, err); 46 return err; 47 } 48 49 if (skb->len != sizeof(*bda)) { 50 BT_ERR("%s: Intel device address length mismatch", hdev->name); 51 kfree_skb(skb); 52 return -EIO; 53 } 54 55 bda = (struct hci_rp_read_bd_addr *)skb->data; 56 57 /* For some Intel based controllers, the default Bluetooth device 58 * address 00:03:19:9E:8B:00 can be found. These controllers are 59 * fully operational, but have the danger of duplicate addresses 60 * and that in turn can cause problems with Bluetooth operation. 61 */ 62 if (!bacmp(&bda->bdaddr, BDADDR_INTEL)) { 63 BT_ERR("%s: Found Intel default device address (%pMR)", 64 hdev->name, &bda->bdaddr); 65 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks); 66 } 67 68 kfree_skb(skb); 69 70 return 0; 71 } 72 EXPORT_SYMBOL_GPL(btintel_check_bdaddr); 73 74 int btintel_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) 75 { 76 struct sk_buff *skb; 77 int err; 78 79 skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT); 80 if (IS_ERR(skb)) { 81 err = PTR_ERR(skb); 82 BT_ERR("%s: Changing Intel device address failed (%d)", 83 hdev->name, err); 84 return err; 85 } 86 kfree_skb(skb); 87 88 return 0; 89 } 90 EXPORT_SYMBOL_GPL(btintel_set_bdaddr); 91 92 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 93 MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION); 94 MODULE_VERSION(VERSION); 95 MODULE_LICENSE("GPL"); 96