1/*
2   Copyright (c) 2010,2011 Code Aurora Forum.  All rights reserved.
3   Copyright (c) 2011,2012 Intel Corp.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License version 2 and
7   only version 2 as published by the Free Software Foundation.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13*/
14
15#ifndef __A2MP_H
16#define __A2MP_H
17
18#include <net/bluetooth/l2cap.h>
19
20#define A2MP_FEAT_EXT	0x8000
21
22enum amp_mgr_state {
23	READ_LOC_AMP_INFO,
24	READ_LOC_AMP_ASSOC,
25	READ_LOC_AMP_ASSOC_FINAL,
26	WRITE_REMOTE_AMP_ASSOC,
27};
28
29struct amp_mgr {
30	struct list_head	list;
31	struct l2cap_conn	*l2cap_conn;
32	struct l2cap_chan	*a2mp_chan;
33	struct l2cap_chan	*bredr_chan;
34	struct kref		kref;
35	__u8			ident;
36	__u8			handle;
37	unsigned long		state;
38	unsigned long		flags;
39
40	struct list_head	amp_ctrls;
41	struct mutex		amp_ctrls_lock;
42};
43
44struct a2mp_cmd {
45	__u8	code;
46	__u8	ident;
47	__le16	len;
48	__u8	data[0];
49} __packed;
50
51/* A2MP command codes */
52#define A2MP_COMMAND_REJ         0x01
53struct a2mp_cmd_rej {
54	__le16	reason;
55	__u8	data[0];
56} __packed;
57
58#define A2MP_DISCOVER_REQ        0x02
59struct a2mp_discov_req {
60	__le16	mtu;
61	__le16	ext_feat;
62} __packed;
63
64struct a2mp_cl {
65	__u8	id;
66	__u8	type;
67	__u8	status;
68} __packed;
69
70#define A2MP_DISCOVER_RSP        0x03
71struct a2mp_discov_rsp {
72	__le16     mtu;
73	__le16     ext_feat;
74	struct a2mp_cl cl[0];
75} __packed;
76
77#define A2MP_CHANGE_NOTIFY       0x04
78#define A2MP_CHANGE_RSP          0x05
79
80#define A2MP_GETINFO_REQ         0x06
81struct a2mp_info_req {
82	__u8       id;
83} __packed;
84
85#define A2MP_GETINFO_RSP         0x07
86struct a2mp_info_rsp {
87	__u8	id;
88	__u8	status;
89	__le32	total_bw;
90	__le32	max_bw;
91	__le32	min_latency;
92	__le16	pal_cap;
93	__le16	assoc_size;
94} __packed;
95
96#define A2MP_GETAMPASSOC_REQ     0x08
97struct a2mp_amp_assoc_req {
98	__u8	id;
99} __packed;
100
101#define A2MP_GETAMPASSOC_RSP     0x09
102struct a2mp_amp_assoc_rsp {
103	__u8	id;
104	__u8	status;
105	__u8	amp_assoc[0];
106} __packed;
107
108#define A2MP_CREATEPHYSLINK_REQ  0x0A
109#define A2MP_DISCONNPHYSLINK_REQ 0x0C
110struct a2mp_physlink_req {
111	__u8	local_id;
112	__u8	remote_id;
113	__u8	amp_assoc[0];
114} __packed;
115
116#define A2MP_CREATEPHYSLINK_RSP  0x0B
117#define A2MP_DISCONNPHYSLINK_RSP 0x0D
118struct a2mp_physlink_rsp {
119	__u8	local_id;
120	__u8	remote_id;
121	__u8	status;
122} __packed;
123
124/* A2MP response status */
125#define A2MP_STATUS_SUCCESS			0x00
126#define A2MP_STATUS_INVALID_CTRL_ID		0x01
127#define A2MP_STATUS_UNABLE_START_LINK_CREATION	0x02
128#define A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS	0x02
129#define A2MP_STATUS_COLLISION_OCCURED		0x03
130#define A2MP_STATUS_DISCONN_REQ_RECVD		0x04
131#define A2MP_STATUS_PHYS_LINK_EXISTS		0x05
132#define A2MP_STATUS_SECURITY_VIOLATION		0x06
133
134extern struct list_head amp_mgr_list;
135extern struct mutex amp_mgr_list_lock;
136
137struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr);
138int amp_mgr_put(struct amp_mgr *mgr);
139u8 __next_ident(struct amp_mgr *mgr);
140struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
141				       struct sk_buff *skb);
142struct amp_mgr *amp_mgr_lookup_by_state(u8 state);
143void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data);
144void a2mp_discover_amp(struct l2cap_chan *chan);
145void a2mp_send_getinfo_rsp(struct hci_dev *hdev);
146void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status);
147void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status);
148void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status);
149
150#endif /* __A2MP_H */
151