[mirror_ubuntu-zesty-kernel.git] / drivers / bluetooth / btintel.c

/*
 *
 *  Bluetooth support for Intel devices
 *
 *  Copyright (C) 2015  Intel Corporation
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/module.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

#include "btintel.h"

#define VERSION "0.1"

#define BDADDR_INTEL (&(bdaddr_t) {{0x00, 0x8b, 0x9e, 0x19, 0x03, 0x00}})

int btintel_check_bdaddr(struct hci_dev *hdev)
{
	struct hci_rp_read_bd_addr *bda;
	struct sk_buff *skb;

	skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
			     HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
		int err = PTR_ERR(skb);
		BT_ERR("%s: Reading Intel device address failed (%d)",
		       hdev->name, err);
		return err;
	}

	if (skb->len != sizeof(*bda)) {
		BT_ERR("%s: Intel device address length mismatch", hdev->name);
		kfree_skb(skb);
		return -EIO;
	}

	bda = (struct hci_rp_read_bd_addr *)skb->data;

	/* For some Intel based controllers, the default Bluetooth device
	 * address 00:03:19:9E:8B:00 can be found. These controllers are
	 * fully operational, but have the danger of duplicate addresses
	 * and that in turn can cause problems with Bluetooth operation.
	 */
	if (!bacmp(&bda->bdaddr, BDADDR_INTEL)) {
		BT_ERR("%s: Found Intel default device address (%pMR)",
		       hdev->name, &bda->bdaddr);
		set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
	}

	kfree_skb(skb);

	return 0;
}
EXPORT_SYMBOL_GPL(btintel_check_bdaddr);

int btintel_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
{
	struct sk_buff *skb;
	int err;

	skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
		err = PTR_ERR(skb);
		BT_ERR("%s: Changing Intel device address failed (%d)",
		       hdev->name, err);
		return err;
	}
	kfree_skb(skb);

	return 0;
}
EXPORT_SYMBOL_GPL(btintel_set_bdaddr);

void btintel_hw_error(struct hci_dev *hdev, u8 code)
{
	struct sk_buff *skb;
	u8 type = 0x00;

	BT_ERR("%s: Hardware error 0x%2.2x", hdev->name, code);

	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
		BT_ERR("%s: Reset after hardware error failed (%ld)",
		       hdev->name, PTR_ERR(skb));
		return;
	}
	kfree_skb(skb);

	skb = __hci_cmd_sync(hdev, 0xfc22, 1, &type, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
		BT_ERR("%s: Retrieving Intel exception info failed (%ld)",
		       hdev->name, PTR_ERR(skb));
		return;
	}

	if (skb->len != 13) {
		BT_ERR("%s: Exception info size mismatch", hdev->name);
		kfree_skb(skb);
		return;
	}

	BT_ERR("%s: Exception info %s", hdev->name, (char *)(skb->data + 1));

	kfree_skb(skb);
}
EXPORT_SYMBOL_GPL(btintel_hw_error);

int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen,
			const void *param)
{
	while (plen > 0) {
		struct sk_buff *skb;
		u8 cmd_param[253], fragment_len = (plen > 252) ? 252 : plen;

		cmd_param[0] = fragment_type;
		memcpy(cmd_param + 1, param, fragment_len);

		skb = __hci_cmd_sync(hdev, 0xfc09, fragment_len + 1,
				     cmd_param, HCI_INIT_TIMEOUT);
		if (IS_ERR(skb))
			return PTR_ERR(skb);

		kfree_skb(skb);

		plen -= fragment_len;
		param += fragment_len;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(btintel_secure_send);

MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
Commit	Line	Data
48f0ed1b MH	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;
48f0ed1b MH	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
973bb97e MH	92	void btintel_hw_error(struct hci_dev *hdev, u8 code)
	93	{
	94	struct sk_buff *skb;
	95	u8 type = 0x00;
	96
	97	BT_ERR("%s: Hardware error 0x%2.2x", hdev->name, code);
	98
	99	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
	100	if (IS_ERR(skb)) {
	101	BT_ERR("%s: Reset after hardware error failed (%ld)",
	102	hdev->name, PTR_ERR(skb));
	103	return;
	104	}
	105	kfree_skb(skb);
	106
	107	skb = __hci_cmd_sync(hdev, 0xfc22, 1, &type, HCI_INIT_TIMEOUT);
	108	if (IS_ERR(skb)) {
	109	BT_ERR("%s: Retrieving Intel exception info failed (%ld)",
	110	hdev->name, PTR_ERR(skb));
	111	return;
	112	}
	113
	114	if (skb->len != 13) {
	115	BT_ERR("%s: Exception info size mismatch", hdev->name);
	116	kfree_skb(skb);
	117	return;
	118	}
	119
	120	BT_ERR("%s: Exception info %s", hdev->name, (char *)(skb->data + 1));
	121
	122	kfree_skb(skb);
	123	}
	124	EXPORT_SYMBOL_GPL(btintel_hw_error);
	125
09df123d MH	126	int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen,
	127	const void *param)
	128	{
	129	while (plen > 0) {
	130	struct sk_buff *skb;
	131	u8 cmd_param[253], fragment_len = (plen > 252) ? 252 : plen;
	132
	133	cmd_param[0] = fragment_type;
	134	memcpy(cmd_param + 1, param, fragment_len);
	135
	136	skb = __hci_cmd_sync(hdev, 0xfc09, fragment_len + 1,
	137	cmd_param, HCI_INIT_TIMEOUT);
	138	if (IS_ERR(skb))
	139	return PTR_ERR(skb);
	140
	141	kfree_skb(skb);
	142
	143	plen -= fragment_len;
	144	param += fragment_len;
	145	}
	146
	147	return 0;
	148	}
	149	EXPORT_SYMBOL_GPL(btintel_secure_send);
	150
48f0ed1b MH	151	MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
	152	MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
	153	MODULE_VERSION(VERSION);
	154	MODULE_LICENSE("GPL");