| Marcel Holtmann | 48f0ed1 | 2015-04-06 00:52:11 -0700 | [diff] [blame] | 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"); |