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
35int 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}
78EXPORT_SYMBOL_GPL(btintel_check_bdaddr);
79
80int 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}
96EXPORT_SYMBOL_GPL(btintel_set_bdaddr);
97
98MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
99MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
100MODULE_VERSION(VERSION);
101MODULE_LICENSE("GPL");
102