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 13
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 #define HCI_UART_AML 12
38
39 #define HCI_UART_RAW_DEVICE 0
40 #define HCI_UART_RESET_ON_INIT 1
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
101 int hci_uart_register_device_priv(struct hci_uart *hu,
102 const struct hci_uart_proto *p,
103 int sizeof_priv);
104
hci_uart_register_device(struct hci_uart * hu,const struct hci_uart_proto * p)105 static inline int hci_uart_register_device(struct hci_uart *hu,
106 const struct hci_uart_proto *p)
107 {
108 return hci_uart_register_device_priv(hu, p, 0);
109 }
110
111 void hci_uart_unregister_device(struct hci_uart *hu);
112
113 int hci_uart_tx_wakeup(struct hci_uart *hu);
114 int hci_uart_wait_until_sent(struct hci_uart *hu);
115 int hci_uart_init_ready(struct hci_uart *hu);
116 void hci_uart_init_work(struct work_struct *work);
117 void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed);
118 bool hci_uart_has_flow_control(struct hci_uart *hu);
119 void hci_uart_set_flow_control(struct hci_uart *hu, bool enable);
120 void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed,
121 unsigned int oper_speed);
122
123 #ifdef CONFIG_BT_HCIUART_H4
124 int h4_init(void);
125 int h4_deinit(void);
126
127 struct h4_recv_pkt {
128 u8 type; /* Packet type */
129 u8 hlen; /* Header length */
130 u8 loff; /* Data length offset in header */
131 u8 lsize; /* Data length field size */
132 u16 maxlen; /* Max overall packet length */
133 int (*recv)(struct hci_dev *hdev, struct sk_buff *skb);
134 };
135
136 #define H4_RECV_ACL \
137 .type = HCI_ACLDATA_PKT, \
138 .hlen = HCI_ACL_HDR_SIZE, \
139 .loff = 2, \
140 .lsize = 2, \
141 .maxlen = HCI_MAX_FRAME_SIZE \
142
143 #define H4_RECV_SCO \
144 .type = HCI_SCODATA_PKT, \
145 .hlen = HCI_SCO_HDR_SIZE, \
146 .loff = 2, \
147 .lsize = 1, \
148 .maxlen = HCI_MAX_SCO_SIZE
149
150 #define H4_RECV_EVENT \
151 .type = HCI_EVENT_PKT, \
152 .hlen = HCI_EVENT_HDR_SIZE, \
153 .loff = 1, \
154 .lsize = 1, \
155 .maxlen = HCI_MAX_EVENT_SIZE
156
157 #define H4_RECV_ISO \
158 .type = HCI_ISODATA_PKT, \
159 .hlen = HCI_ISO_HDR_SIZE, \
160 .loff = 2, \
161 .lsize = 2, \
162 .maxlen = HCI_MAX_FRAME_SIZE \
163
164 struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
165 const unsigned char *buffer, int count,
166 const struct h4_recv_pkt *pkts, int pkts_count);
167 #endif
168
169 #ifdef CONFIG_BT_HCIUART_BCSP
170 int bcsp_init(void);
171 int bcsp_deinit(void);
172 #endif
173
174 #ifdef CONFIG_BT_HCIUART_LL
175 int ll_init(void);
176 int ll_deinit(void);
177 #endif
178
179 #ifdef CONFIG_BT_HCIUART_ATH3K
180 int ath_init(void);
181 int ath_deinit(void);
182 #endif
183
184 #ifdef CONFIG_BT_HCIUART_3WIRE
185 int h5_init(void);
186 int h5_deinit(void);
187 #endif
188
189 #ifdef CONFIG_BT_HCIUART_INTEL
190 int intel_init(void);
191 int intel_deinit(void);
192 #endif
193
194 #ifdef CONFIG_BT_HCIUART_BCM
195 int bcm_init(void);
196 int bcm_deinit(void);
197 #endif
198
199 #ifdef CONFIG_BT_HCIUART_QCA
200 int qca_init(void);
201 int qca_deinit(void);
202 #endif
203
204 #ifdef CONFIG_BT_HCIUART_AG6XX
205 int ag6xx_init(void);
206 int ag6xx_deinit(void);
207 #endif
208
209 #ifdef CONFIG_BT_HCIUART_MRVL
210 int mrvl_init(void);
211 int mrvl_deinit(void);
212 #endif
213
214 #ifdef CONFIG_BT_HCIUART_AML
215 int aml_init(void);
216 int aml_deinit(void);
217 #endif
218