tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_INIT_PENDING 3
41#define HCI_UART_EXT_CONFIG 4
42#define HCI_UART_VND_DETECT 5
43
44struct hci_uart;
45struct serdev_device;
46
47struct hci_uart_proto {
48 unsigned int id;
49 const char *name;
50 unsigned int manufacturer;
51 unsigned int init_speed;
52 unsigned int oper_speed;
53 int (*open)(struct hci_uart *hu);
54 int (*close)(struct hci_uart *hu);
55 int (*flush)(struct hci_uart *hu);
56 int (*setup)(struct hci_uart *hu);
57 int (*set_baudrate)(struct hci_uart *hu, unsigned int speed);
58 int (*recv)(struct hci_uart *hu, const void *data, int len);
59 int (*enqueue)(struct hci_uart *hu, struct sk_buff *skb);
60 struct sk_buff *(*dequeue)(struct hci_uart *hu);
61};
62
63struct hci_uart {
64 struct tty_struct *tty;
65 struct serdev_device *serdev;
66 struct hci_dev *hdev;
67 unsigned long flags;
68 unsigned long hdev_flags;
69
70 struct work_struct init_ready;
71 struct work_struct write_work;
72
73 const struct hci_uart_proto *proto;
74 struct percpu_rw_semaphore proto_lock; /* Stop work for proto close */
75 void *priv;
76
77 struct sk_buff *tx_skb;
78 unsigned long tx_state;
79
80 unsigned int init_speed;
81 unsigned int oper_speed;
82
83 u8 alignment;
84 u8 padding;
85};
86
87/* HCI_UART proto flag bits */
88#define HCI_UART_PROTO_SET 0
89#define HCI_UART_REGISTERED 1
90#define HCI_UART_PROTO_READY 2
91#define HCI_UART_NO_SUSPEND_NOTIFIER 3
92
93/* TX states */
94#define HCI_UART_SENDING 1
95#define HCI_UART_TX_WAKEUP 2
96
97int hci_uart_register_proto(const struct hci_uart_proto *p);
98int hci_uart_unregister_proto(const struct hci_uart_proto *p);
99
100int hci_uart_register_device_priv(struct hci_uart *hu,
101 const struct hci_uart_proto *p,
102 int sizeof_priv);
103
104static inline int hci_uart_register_device(struct hci_uart *hu,
105 const struct hci_uart_proto *p)
106{
107 return hci_uart_register_device_priv(hu, p, 0);
108}
109
110void hci_uart_unregister_device(struct hci_uart *hu);
111
112int hci_uart_tx_wakeup(struct hci_uart *hu);
113int hci_uart_wait_until_sent(struct hci_uart *hu);
114int hci_uart_init_ready(struct hci_uart *hu);
115void hci_uart_init_work(struct work_struct *work);
116void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed);
117bool hci_uart_has_flow_control(struct hci_uart *hu);
118void hci_uart_set_flow_control(struct hci_uart *hu, bool enable);
119void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed,
120 unsigned int oper_speed);
121
122#ifdef CONFIG_BT_HCIUART_H4
123int h4_init(void);
124int h4_deinit(void);
125
126struct h4_recv_pkt {
127 u8 type; /* Packet type */
128 u8 hlen; /* Header length */
129 u8 loff; /* Data length offset in header */
130 u8 lsize; /* Data length field size */
131 u16 maxlen; /* Max overall packet length */
132 int (*recv)(struct hci_dev *hdev, struct sk_buff *skb);
133};
134
135#define H4_RECV_ACL \
136 .type = HCI_ACLDATA_PKT, \
137 .hlen = HCI_ACL_HDR_SIZE, \
138 .loff = 2, \
139 .lsize = 2, \
140 .maxlen = HCI_MAX_FRAME_SIZE \
141
142#define H4_RECV_SCO \
143 .type = HCI_SCODATA_PKT, \
144 .hlen = HCI_SCO_HDR_SIZE, \
145 .loff = 2, \
146 .lsize = 1, \
147 .maxlen = HCI_MAX_SCO_SIZE
148
149#define H4_RECV_EVENT \
150 .type = HCI_EVENT_PKT, \
151 .hlen = HCI_EVENT_HDR_SIZE, \
152 .loff = 1, \
153 .lsize = 1, \
154 .maxlen = HCI_MAX_EVENT_SIZE
155
156#define H4_RECV_ISO \
157 .type = HCI_ISODATA_PKT, \
158 .hlen = HCI_ISO_HDR_SIZE, \
159 .loff = 2, \
160 .lsize = 2, \
161 .maxlen = HCI_MAX_FRAME_SIZE \
162
163struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
164 const unsigned char *buffer, int count,
165 const struct h4_recv_pkt *pkts, int pkts_count);
166#endif
167
168#ifdef CONFIG_BT_HCIUART_BCSP
169int bcsp_init(void);
170int bcsp_deinit(void);
171#endif
172
173#ifdef CONFIG_BT_HCIUART_LL
174int ll_init(void);
175int ll_deinit(void);
176#endif
177
178#ifdef CONFIG_BT_HCIUART_ATH3K
179int ath_init(void);
180int ath_deinit(void);
181#endif
182
183#ifdef CONFIG_BT_HCIUART_3WIRE
184int h5_init(void);
185int h5_deinit(void);
186#endif
187
188#ifdef CONFIG_BT_HCIUART_INTEL
189int intel_init(void);
190int intel_deinit(void);
191#endif
192
193#ifdef CONFIG_BT_HCIUART_BCM
194int bcm_init(void);
195int bcm_deinit(void);
196#endif
197
198#ifdef CONFIG_BT_HCIUART_QCA
199int qca_init(void);
200int qca_deinit(void);
201#endif
202
203#ifdef CONFIG_BT_HCIUART_AG6XX
204int ag6xx_init(void);
205int ag6xx_deinit(void);
206#endif
207
208#ifdef CONFIG_BT_HCIUART_MRVL
209int mrvl_init(void);
210int mrvl_deinit(void);
211#endif