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 44 struct hci_uart; 45 struct serdev_device; 46 47 struct 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 63 struct 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 97 int hci_uart_register_proto(const struct hci_uart_proto *p); 98 int hci_uart_unregister_proto(const struct hci_uart_proto *p); 99 100 int hci_uart_register_device_priv(struct hci_uart *hu, 101 const struct hci_uart_proto *p, 102 int sizeof_priv); 103 104 static 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 } 109 110 void hci_uart_unregister_device(struct hci_uart *hu); 111 112 int hci_uart_tx_wakeup(struct hci_uart *hu); 113 int hci_uart_wait_until_sent(struct hci_uart *hu); 114 int hci_uart_init_ready(struct hci_uart *hu); 115 void hci_uart_init_work(struct work_struct *work); 116 void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed); 117 bool hci_uart_has_flow_control(struct hci_uart *hu); 118 void hci_uart_set_flow_control(struct hci_uart *hu, bool enable); 119 void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, 120 unsigned int oper_speed); 121 122 #ifdef CONFIG_BT_HCIUART_H4 123 int h4_init(void); 124 int h4_deinit(void); 125 126 struct 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 \ 162 163 struct 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 169 int bcsp_init(void); 170 int bcsp_deinit(void); 171 #endif 172 173 #ifdef CONFIG_BT_HCIUART_LL 174 int ll_init(void); 175 int ll_deinit(void); 176 #endif 177 178 #ifdef CONFIG_BT_HCIUART_ATH3K 179 int ath_init(void); 180 int ath_deinit(void); 181 #endif 182 183 #ifdef CONFIG_BT_HCIUART_3WIRE 184 int h5_init(void); 185 int h5_deinit(void); 186 #endif 187 188 #ifdef CONFIG_BT_HCIUART_INTEL 189 int intel_init(void); 190 int intel_deinit(void); 191 #endif 192 193 #ifdef CONFIG_BT_HCIUART_BCM 194 int bcm_init(void); 195 int bcm_deinit(void); 196 #endif 197 198 #ifdef CONFIG_BT_HCIUART_QCA 199 int qca_init(void); 200 int qca_deinit(void); 201 #endif 202 203 #ifdef CONFIG_BT_HCIUART_AG6XX 204 int ag6xx_init(void); 205 int ag6xx_deinit(void); 206 #endif 207 208 #ifdef CONFIG_BT_HCIUART_MRVL 209 int mrvl_init(void); 210 int mrvl_deinit(void); 211 #endif 212