xref: /openbmc/linux/drivers/bluetooth/hci_uart.h (revision e2f1cf25)
1 /*
2  *
3  *  Bluetooth HCI UART driver
4  *
5  *  Copyright (C) 2000-2001  Qualcomm Incorporated
6  *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
7  *  Copyright (C) 2004-2005  Marcel Holtmann <marcel@holtmann.org>
8  *
9  *
10  *  This program is free software; you can redistribute it and/or modify
11  *  it under the terms of the GNU General Public License as published by
12  *  the Free Software Foundation; either version 2 of the License, or
13  *  (at your option) any later version.
14  *
15  *  This program is distributed in the hope that it will be useful,
16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  *  GNU General Public License for more details.
19  *
20  *  You should have received a copy of the GNU General Public License
21  *  along with this program; if not, write to the Free Software
22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
23  *
24  */
25 
26 #ifndef N_HCI
27 #define N_HCI	15
28 #endif
29 
30 /* Ioctls */
31 #define HCIUARTSETPROTO		_IOW('U', 200, int)
32 #define HCIUARTGETPROTO		_IOR('U', 201, int)
33 #define HCIUARTGETDEVICE	_IOR('U', 202, int)
34 #define HCIUARTSETFLAGS		_IOW('U', 203, int)
35 #define HCIUARTGETFLAGS		_IOR('U', 204, int)
36 
37 /* UART protocols */
38 #define HCI_UART_MAX_PROTO	8
39 
40 #define HCI_UART_H4	0
41 #define HCI_UART_BCSP	1
42 #define HCI_UART_3WIRE	2
43 #define HCI_UART_H4DS	3
44 #define HCI_UART_LL	4
45 #define HCI_UART_ATH3K	5
46 #define HCI_UART_INTEL	6
47 #define HCI_UART_BCM	7
48 
49 #define HCI_UART_RAW_DEVICE	0
50 #define HCI_UART_RESET_ON_INIT	1
51 #define HCI_UART_CREATE_AMP	2
52 #define HCI_UART_INIT_PENDING	3
53 #define HCI_UART_EXT_CONFIG	4
54 #define HCI_UART_VND_DETECT	5
55 
56 struct hci_uart;
57 
58 struct hci_uart_proto {
59 	unsigned int id;
60 	const char *name;
61 	unsigned int init_speed;
62 	unsigned int oper_speed;
63 	int (*open)(struct hci_uart *hu);
64 	int (*close)(struct hci_uart *hu);
65 	int (*flush)(struct hci_uart *hu);
66 	int (*setup)(struct hci_uart *hu);
67 	int (*set_baudrate)(struct hci_uart *hu, unsigned int speed);
68 	int (*recv)(struct hci_uart *hu, const void *data, int len);
69 	int (*enqueue)(struct hci_uart *hu, struct sk_buff *skb);
70 	struct sk_buff *(*dequeue)(struct hci_uart *hu);
71 };
72 
73 struct hci_uart {
74 	struct tty_struct	*tty;
75 	struct hci_dev		*hdev;
76 	unsigned long		flags;
77 	unsigned long		hdev_flags;
78 
79 	struct work_struct	init_ready;
80 	struct work_struct	write_work;
81 
82 	const struct hci_uart_proto *proto;
83 	void			*priv;
84 
85 	struct sk_buff		*tx_skb;
86 	unsigned long		tx_state;
87 	spinlock_t		rx_lock;
88 
89 	unsigned int init_speed;
90 	unsigned int oper_speed;
91 };
92 
93 /* HCI_UART proto flag bits */
94 #define HCI_UART_PROTO_SET	0
95 #define HCI_UART_REGISTERED	1
96 
97 /* TX states  */
98 #define HCI_UART_SENDING	1
99 #define HCI_UART_TX_WAKEUP	2
100 
101 int hci_uart_register_proto(const struct hci_uart_proto *p);
102 int hci_uart_unregister_proto(const struct hci_uart_proto *p);
103 int hci_uart_tx_wakeup(struct hci_uart *hu);
104 int hci_uart_init_ready(struct hci_uart *hu);
105 void hci_uart_init_tty(struct hci_uart *hu);
106 void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed);
107 void hci_uart_set_flow_control(struct hci_uart *hu, bool enable);
108 void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed,
109 			 unsigned int oper_speed);
110 
111 #ifdef CONFIG_BT_HCIUART_H4
112 int h4_init(void);
113 int h4_deinit(void);
114 
115 struct h4_recv_pkt {
116 	u8  type;	/* Packet type */
117 	u8  hlen;	/* Header length */
118 	u8  loff;	/* Data length offset in header */
119 	u8  lsize;	/* Data length field size */
120 	u16 maxlen;	/* Max overall packet length */
121 	int (*recv)(struct hci_dev *hdev, struct sk_buff *skb);
122 };
123 
124 #define H4_RECV_ACL \
125 	.type = HCI_ACLDATA_PKT, \
126 	.hlen = HCI_ACL_HDR_SIZE, \
127 	.loff = 2, \
128 	.lsize = 2, \
129 	.maxlen = HCI_MAX_FRAME_SIZE \
130 
131 #define H4_RECV_SCO \
132 	.type = HCI_SCODATA_PKT, \
133 	.hlen = HCI_SCO_HDR_SIZE, \
134 	.loff = 2, \
135 	.lsize = 1, \
136 	.maxlen = HCI_MAX_SCO_SIZE
137 
138 #define H4_RECV_EVENT \
139 	.type = HCI_EVENT_PKT, \
140 	.hlen = HCI_EVENT_HDR_SIZE, \
141 	.loff = 1, \
142 	.lsize = 1, \
143 	.maxlen = HCI_MAX_EVENT_SIZE
144 
145 struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
146 			    const unsigned char *buffer, int count,
147 			    const struct h4_recv_pkt *pkts, int pkts_count);
148 #endif
149 
150 #ifdef CONFIG_BT_HCIUART_BCSP
151 int bcsp_init(void);
152 int bcsp_deinit(void);
153 #endif
154 
155 #ifdef CONFIG_BT_HCIUART_LL
156 int ll_init(void);
157 int ll_deinit(void);
158 #endif
159 
160 #ifdef CONFIG_BT_HCIUART_ATH3K
161 int ath_init(void);
162 int ath_deinit(void);
163 #endif
164 
165 #ifdef CONFIG_BT_HCIUART_3WIRE
166 int h5_init(void);
167 int h5_deinit(void);
168 #endif
169 
170 #ifdef CONFIG_BT_HCIUART_BCM
171 int bcm_init(void);
172 int bcm_deinit(void);
173 #endif
174