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 if (bda->status) { 57 BT_ERR("%s: Intel device address result failed (%02x)", 58 hdev->name, bda->status); 59 kfree_skb(skb); 60 return -bt_to_errno(bda->status); 61 } 62 63 /* For some Intel based controllers, the default Bluetooth device 64 * address 00:03:19:9E:8B:00 can be found. These controllers are 65 * fully operational, but have the danger of duplicate addresses 66 * and that in turn can cause problems with Bluetooth operation. 67 */ 68 if (!bacmp(&bda->bdaddr, BDADDR_INTEL)) { 69 BT_ERR("%s: Found Intel default device address (%pMR)", 70 hdev->name, &bda->bdaddr); 71 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks); 72 } 73 74 kfree_skb(skb); 75 76 return 0; 77 } 78 EXPORT_SYMBOL_GPL(btintel_check_bdaddr); 79 80 int btintel_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) 81 { 82 struct sk_buff *skb; 83 int err; 84 85 skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT); 86 if (IS_ERR(skb)) { 87 err = PTR_ERR(skb); 88 BT_ERR("%s: Changing Intel device address failed (%d)", 89 hdev->name, err); 90 return err; 91 } 92 kfree_skb(skb); 93 94 return 0; 95 } 96 EXPORT_SYMBOL_GPL(btintel_set_bdaddr); 97 98 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 99 MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION); 100 MODULE_VERSION(VERSION); 101 MODULE_LICENSE("GPL"); 102