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