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_CREATE_AMP 2 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 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 int hci_uart_register_device(struct hci_uart *hu, const struct hci_uart_proto *p); 100 void hci_uart_unregister_device(struct hci_uart *hu); 101 102 int hci_uart_tx_wakeup(struct hci_uart *hu); 103 int hci_uart_wait_until_sent(struct hci_uart *hu); 104 int hci_uart_init_ready(struct hci_uart *hu); 105 void hci_uart_init_work(struct work_struct *work); 106 void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed); 107 bool hci_uart_has_flow_control(struct hci_uart *hu); 108 void hci_uart_set_flow_control(struct hci_uart *hu, bool enable); 109 void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, 110 unsigned int oper_speed); 111 112 #ifdef CONFIG_BT_HCIUART_H4 113 int h4_init(void); 114 int h4_deinit(void); 115 116 struct h4_recv_pkt { 117 u8 type; /* Packet type */ 118 u8 hlen; /* Header length */ 119 u8 loff; /* Data length offset in header */ 120 u8 lsize; /* Data length field size */ 121 u16 maxlen; /* Max overall packet length */ 122 int (*recv)(struct hci_dev *hdev, struct sk_buff *skb); 123 }; 124 125 #define H4_RECV_ACL \ 126 .type = HCI_ACLDATA_PKT, \ 127 .hlen = HCI_ACL_HDR_SIZE, \ 128 .loff = 2, \ 129 .lsize = 2, \ 130 .maxlen = HCI_MAX_FRAME_SIZE \ 131 132 #define H4_RECV_SCO \ 133 .type = HCI_SCODATA_PKT, \ 134 .hlen = HCI_SCO_HDR_SIZE, \ 135 .loff = 2, \ 136 .lsize = 1, \ 137 .maxlen = HCI_MAX_SCO_SIZE 138 139 #define H4_RECV_EVENT \ 140 .type = HCI_EVENT_PKT, \ 141 .hlen = HCI_EVENT_HDR_SIZE, \ 142 .loff = 1, \ 143 .lsize = 1, \ 144 .maxlen = HCI_MAX_EVENT_SIZE 145 146 struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb, 147 const unsigned char *buffer, int count, 148 const struct h4_recv_pkt *pkts, int pkts_count); 149 #endif 150 151 #ifdef CONFIG_BT_HCIUART_BCSP 152 int bcsp_init(void); 153 int bcsp_deinit(void); 154 #endif 155 156 #ifdef CONFIG_BT_HCIUART_LL 157 int ll_init(void); 158 int ll_deinit(void); 159 #endif 160 161 #ifdef CONFIG_BT_HCIUART_ATH3K 162 int ath_init(void); 163 int ath_deinit(void); 164 #endif 165 166 #ifdef CONFIG_BT_HCIUART_3WIRE 167 int h5_init(void); 168 int h5_deinit(void); 169 #endif 170 171 #ifdef CONFIG_BT_HCIUART_INTEL 172 int intel_init(void); 173 int intel_deinit(void); 174 #endif 175 176 #ifdef CONFIG_BT_HCIUART_BCM 177 int bcm_init(void); 178 int bcm_deinit(void); 179 #endif 180 181 #ifdef CONFIG_BT_HCIUART_QCA 182 int qca_init(void); 183 int qca_deinit(void); 184 #endif 185 186 #ifdef CONFIG_BT_HCIUART_AG6XX 187 int ag6xx_init(void); 188 int ag6xx_deinit(void); 189 #endif 190 191 #ifdef CONFIG_BT_HCIUART_MRVL 192 int mrvl_init(void); 193 int mrvl_deinit(void); 194 #endif 195