Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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 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
45struct hci_uart;
46struct serdev_device;
47
48struct 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
64struct 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#define HCI_UART_PROTO_INIT 4
94
95/* TX states */
96#define HCI_UART_SENDING 1
97#define HCI_UART_TX_WAKEUP 2
98
99int hci_uart_register_proto(const struct hci_uart_proto *p);
100int hci_uart_unregister_proto(const struct hci_uart_proto *p);
101
102int hci_uart_register_device_priv(struct hci_uart *hu,
103 const struct hci_uart_proto *p,
104 int sizeof_priv);
105
106static inline int hci_uart_register_device(struct hci_uart *hu,
107 const struct hci_uart_proto *p)
108{
109 return hci_uart_register_device_priv(hu, p, 0);
110}
111
112void hci_uart_unregister_device(struct hci_uart *hu);
113
114int hci_uart_tx_wakeup(struct hci_uart *hu);
115int hci_uart_wait_until_sent(struct hci_uart *hu);
116int hci_uart_init_ready(struct hci_uart *hu);
117void hci_uart_init_work(struct work_struct *work);
118void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed);
119bool hci_uart_has_flow_control(struct hci_uart *hu);
120void hci_uart_set_flow_control(struct hci_uart *hu, bool enable);
121void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed,
122 unsigned int oper_speed);
123
124struct h4_recv_pkt {
125 u8 type; /* Packet type */
126 u8 hlen; /* Header length */
127 u8 loff; /* Data length offset in header */
128 u8 lsize; /* Data length field size */
129 u16 maxlen; /* Max overall packet length */
130 int (*recv)(struct hci_dev *hdev, struct sk_buff *skb);
131};
132
133#define H4_RECV_ACL \
134 .type = HCI_ACLDATA_PKT, \
135 .hlen = HCI_ACL_HDR_SIZE, \
136 .loff = 2, \
137 .lsize = 2, \
138 .maxlen = HCI_MAX_FRAME_SIZE \
139
140#define H4_RECV_SCO \
141 .type = HCI_SCODATA_PKT, \
142 .hlen = HCI_SCO_HDR_SIZE, \
143 .loff = 2, \
144 .lsize = 1, \
145 .maxlen = HCI_MAX_SCO_SIZE
146
147#define H4_RECV_EVENT \
148 .type = HCI_EVENT_PKT, \
149 .hlen = HCI_EVENT_HDR_SIZE, \
150 .loff = 1, \
151 .lsize = 1, \
152 .maxlen = HCI_MAX_EVENT_SIZE
153
154#define H4_RECV_ISO \
155 .type = HCI_ISODATA_PKT, \
156 .hlen = HCI_ISO_HDR_SIZE, \
157 .loff = 2, \
158 .lsize = 2, \
159 .maxlen = HCI_MAX_FRAME_SIZE \
160
161#ifdef CONFIG_BT_HCIUART_H4
162int h4_init(void);
163int h4_deinit(void);
164
165struct sk_buff *h4_recv_buf(struct hci_uart *hu, struct sk_buff *skb,
166 const unsigned char *buffer, int count,
167 const struct h4_recv_pkt *pkts, int pkts_count);
168#endif
169
170#ifdef CONFIG_BT_HCIUART_BCSP
171int bcsp_init(void);
172int bcsp_deinit(void);
173#endif
174
175#ifdef CONFIG_BT_HCIUART_LL
176int ll_init(void);
177int ll_deinit(void);
178#endif
179
180#ifdef CONFIG_BT_HCIUART_ATH3K
181int ath_init(void);
182int ath_deinit(void);
183#endif
184
185#ifdef CONFIG_BT_HCIUART_3WIRE
186int h5_init(void);
187int h5_deinit(void);
188#endif
189
190#ifdef CONFIG_BT_HCIUART_INTEL
191int intel_init(void);
192int intel_deinit(void);
193#endif
194
195#ifdef CONFIG_BT_HCIUART_BCM
196int bcm_init(void);
197int bcm_deinit(void);
198#endif
199
200#ifdef CONFIG_BT_HCIUART_QCA
201int qca_init(void);
202int qca_deinit(void);
203#endif
204
205#ifdef CONFIG_BT_HCIUART_AG6XX
206int ag6xx_init(void);
207int ag6xx_deinit(void);
208#endif
209
210#ifdef CONFIG_BT_HCIUART_MRVL
211int mrvl_init(void);
212int mrvl_deinit(void);
213#endif
214
215#ifdef CONFIG_BT_HCIUART_AML
216int aml_init(void);
217int aml_deinit(void);
218#endif