1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *
4  *  Bluetooth HCI UART driver
5  *
6  *  Copyright (C) 2000-2001  Qualcomm Incorporated
7  *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
8  *  Copyright (C) 2004-2005  Marcel Holtmann <marcel@holtmann.org>
9  */
10 
11 #ifndef N_HCI
12 #define N_HCI	15
13 #endif
14 
15 /* Ioctls */
16 #define HCIUARTSETPROTO		_IOW('U', 200, int)
17 #define HCIUARTGETPROTO		_IOR('U', 201, int)
18 #define HCIUARTGETDEVICE	_IOR('U', 202, int)
19 #define HCIUARTSETFLAGS		_IOW('U', 203, int)
20 #define HCIUARTGETFLAGS		_IOR('U', 204, int)
21 
22 /* UART protocols */
23 #define HCI_UART_MAX_PROTO	12
24 
25 #define HCI_UART_H4	0
26 #define HCI_UART_BCSP	1
27 #define HCI_UART_3WIRE	2
28 #define HCI_UART_H4DS	3
29 #define HCI_UART_LL	4
30 #define HCI_UART_ATH3K	5
31 #define HCI_UART_INTEL	6
32 #define HCI_UART_BCM	7
33 #define HCI_UART_QCA	8
34 #define HCI_UART_AG6XX	9
35 #define HCI_UART_NOKIA	10
36 #define HCI_UART_MRVL	11
37 
38 #define HCI_UART_RAW_DEVICE	0
39 #define HCI_UART_RESET_ON_INIT	1
40 #define HCI_UART_CREATE_AMP	2
41 #define HCI_UART_INIT_PENDING	3
42 #define HCI_UART_EXT_CONFIG	4
43 #define HCI_UART_VND_DETECT	5
44 
45 struct hci_uart;
46 struct serdev_device;
47 
48 struct hci_uart_proto {
49 	unsigned int id;
50 	const char *name;
51 	unsigned int manufacturer;
52 	unsigned int init_speed;
53 	unsigned int oper_speed;
54 	int (*open)(struct hci_uart *hu);
55 	int (*close)(struct hci_uart *hu);
56 	int (*flush)(struct hci_uart *hu);
57 	int (*setup)(struct hci_uart *hu);
58 	int (*set_baudrate)(struct hci_uart *hu, unsigned int speed);
59 	int (*recv)(struct hci_uart *hu, const void *data, int len);
60 	int (*enqueue)(struct hci_uart *hu, struct sk_buff *skb);
61 	struct sk_buff *(*dequeue)(struct hci_uart *hu);
62 };
63 
64 struct hci_uart {
65 	struct tty_struct	*tty;
66 	struct serdev_device	*serdev;
67 	struct hci_dev		*hdev;
68 	unsigned long		flags;
69 	unsigned long		hdev_flags;
70 
71 	struct work_struct	init_ready;
72 	struct work_struct	write_work;
73 
74 	const struct hci_uart_proto *proto;
75 	struct percpu_rw_semaphore proto_lock;	/* Stop work for proto close */
76 	void			*priv;
77 
78 	struct sk_buff		*tx_skb;
79 	unsigned long		tx_state;
80 
81 	unsigned int init_speed;
82 	unsigned int oper_speed;
83 
84 	u8			alignment;
85 	u8			padding;
86 };
87 
88 /* HCI_UART proto flag bits */
89 #define HCI_UART_PROTO_SET		0
90 #define HCI_UART_REGISTERED		1
91 #define HCI_UART_PROTO_READY		2
92 #define HCI_UART_NO_SUSPEND_NOTIFIER	3
93 
94 /* TX states  */
95 #define HCI_UART_SENDING	1
96 #define HCI_UART_TX_WAKEUP	2
97 
98 int hci_uart_register_proto(const struct hci_uart_proto *p);
99 int hci_uart_unregister_proto(const struct hci_uart_proto *p);
100 int hci_uart_register_device(struct hci_uart *hu, const struct hci_uart_proto *p);
101 void hci_uart_unregister_device(struct hci_uart *hu);
102 
103 int hci_uart_tx_wakeup(struct hci_uart *hu);
104 int hci_uart_wait_until_sent(struct hci_uart *hu);
105 int hci_uart_init_ready(struct hci_uart *hu);
106 void hci_uart_init_work(struct work_struct *work);
107 void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed);
108 bool hci_uart_has_flow_control(struct hci_uart *hu);
109 void hci_uart_set_flow_control(struct hci_uart *hu, bool enable);
110 void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed,
111 			 unsigned int oper_speed);
112 
113 #ifdef CONFIG_BT_HCIUART_H4
114 int h4_init(void);
115 int h4_deinit(void);
116 
117 struct h4_recv_pkt {
118 	u8  type;	/* Packet type */
119 	u8  hlen;	/* Header length */
120 	u8  loff;	/* Data length offset in header */
121 	u8  lsize;	/* Data length field size */
122 	u16 maxlen;	/* Max overall packet length */
123 	int (*recv)(struct hci_dev *hdev, struct sk_buff *skb);
124 };
125 
126 #define H4_RECV_ACL \
127 	.type = HCI_ACLDATA_PKT, \
128 	.hlen = HCI_ACL_HDR_SIZE, \
129 	.loff = 2, \
130 	.lsize = 2, \
131 	.maxlen = HCI_MAX_FRAME_SIZE \
132 
133 #define H4_RECV_SCO \
134 	.type = HCI_SCODATA_PKT, \
135 	.hlen = HCI_SCO_HDR_SIZE, \
136 	.loff = 2, \
137 	.lsize = 1, \
138 	.maxlen = HCI_MAX_SCO_SIZE
139 
140 #define H4_RECV_EVENT \
141 	.type = HCI_EVENT_PKT, \
142 	.hlen = HCI_EVENT_HDR_SIZE, \
143 	.loff = 1, \
144 	.lsize = 1, \
145 	.maxlen = HCI_MAX_EVENT_SIZE
146 
147 #define H4_RECV_ISO \
148 	.type = HCI_ISODATA_PKT, \
149 	.hlen = HCI_ISO_HDR_SIZE, \
150 	.loff = 2, \
151 	.lsize = 2, \
152 	.maxlen = HCI_MAX_FRAME_SIZE \
153 
154 struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
155 			    const unsigned char *buffer, int count,
156 			    const struct h4_recv_pkt *pkts, int pkts_count);
157 #endif
158 
159 #ifdef CONFIG_BT_HCIUART_BCSP
160 int bcsp_init(void);
161 int bcsp_deinit(void);
162 #endif
163 
164 #ifdef CONFIG_BT_HCIUART_LL
165 int ll_init(void);
166 int ll_deinit(void);
167 #endif
168 
169 #ifdef CONFIG_BT_HCIUART_ATH3K
170 int ath_init(void);
171 int ath_deinit(void);
172 #endif
173 
174 #ifdef CONFIG_BT_HCIUART_3WIRE
175 int h5_init(void);
176 int h5_deinit(void);
177 #endif
178 
179 #ifdef CONFIG_BT_HCIUART_INTEL
180 int intel_init(void);
181 int intel_deinit(void);
182 #endif
183 
184 #ifdef CONFIG_BT_HCIUART_BCM
185 int bcm_init(void);
186 int bcm_deinit(void);
187 #endif
188 
189 #ifdef CONFIG_BT_HCIUART_QCA
190 int qca_init(void);
191 int qca_deinit(void);
192 #endif
193 
194 #ifdef CONFIG_BT_HCIUART_AG6XX
195 int ag6xx_init(void);
196 int ag6xx_deinit(void);
197 #endif
198 
199 #ifdef CONFIG_BT_HCIUART_MRVL
200 int mrvl_init(void);
201 int mrvl_deinit(void);
202 #endif
203