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 #define HCI_UART_PROTO_INIT 4 94 95 /* TX states */ 96 #define HCI_UART_SENDING 1 97 #define HCI_UART_TX_WAKEUP 2 98 99 int hci_uart_register_proto(const struct hci_uart_proto *p); 100 int hci_uart_unregister_proto(const struct hci_uart_proto *p); 101 102 int hci_uart_register_device_priv(struct hci_uart *hu, 103 const struct hci_uart_proto *p, 104 int sizeof_priv); 105 106 static 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 } 111 112 void hci_uart_unregister_device(struct hci_uart *hu); 113 114 int hci_uart_tx_wakeup(struct hci_uart *hu); 115 int hci_uart_wait_until_sent(struct hci_uart *hu); 116 int hci_uart_init_ready(struct hci_uart *hu); 117 void hci_uart_init_work(struct work_struct *work); 118 void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed); 119 bool hci_uart_has_flow_control(struct hci_uart *hu); 120 void hci_uart_set_flow_control(struct hci_uart *hu, bool enable); 121 void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, 122 unsigned int oper_speed); 123 124 #ifdef CONFIG_BT_HCIUART_H4 125 int h4_init(void); 126 int h4_deinit(void); 127 128 struct h4_recv_pkt { 129 u8 type; /* Packet type */ 130 u8 hlen; /* Header length */ 131 u8 loff; /* Data length offset in header */ 132 u8 lsize; /* Data length field size */ 133 u16 maxlen; /* Max overall packet length */ 134 int (*recv)(struct hci_dev *hdev, struct sk_buff *skb); 135 }; 136 137 #define H4_RECV_ACL \ 138 .type = HCI_ACLDATA_PKT, \ 139 .hlen = HCI_ACL_HDR_SIZE, \ 140 .loff = 2, \ 141 .lsize = 2, \ 142 .maxlen = HCI_MAX_FRAME_SIZE \ 143 144 #define H4_RECV_SCO \ 145 .type = HCI_SCODATA_PKT, \ 146 .hlen = HCI_SCO_HDR_SIZE, \ 147 .loff = 2, \ 148 .lsize = 1, \ 149 .maxlen = HCI_MAX_SCO_SIZE 150 151 #define H4_RECV_EVENT \ 152 .type = HCI_EVENT_PKT, \ 153 .hlen = HCI_EVENT_HDR_SIZE, \ 154 .loff = 1, \ 155 .lsize = 1, \ 156 .maxlen = HCI_MAX_EVENT_SIZE 157 158 #define H4_RECV_ISO \ 159 .type = HCI_ISODATA_PKT, \ 160 .hlen = HCI_ISO_HDR_SIZE, \ 161 .loff = 2, \ 162 .lsize = 2, \ 163 .maxlen = HCI_MAX_FRAME_SIZE \ 164 165 struct sk_buff *h4_recv_buf(struct hci_dev *hdev, 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 171 int bcsp_init(void); 172 int bcsp_deinit(void); 173 #endif 174 175 #ifdef CONFIG_BT_HCIUART_LL 176 int ll_init(void); 177 int ll_deinit(void); 178 #endif 179 180 #ifdef CONFIG_BT_HCIUART_ATH3K 181 int ath_init(void); 182 int ath_deinit(void); 183 #endif 184 185 #ifdef CONFIG_BT_HCIUART_3WIRE 186 int h5_init(void); 187 int h5_deinit(void); 188 #endif 189 190 #ifdef CONFIG_BT_HCIUART_INTEL 191 int intel_init(void); 192 int intel_deinit(void); 193 #endif 194 195 #ifdef CONFIG_BT_HCIUART_BCM 196 int bcm_init(void); 197 int bcm_deinit(void); 198 #endif 199 200 #ifdef CONFIG_BT_HCIUART_QCA 201 int qca_init(void); 202 int qca_deinit(void); 203 #endif 204 205 #ifdef CONFIG_BT_HCIUART_AG6XX 206 int ag6xx_init(void); 207 int ag6xx_deinit(void); 208 #endif 209 210 #ifdef CONFIG_BT_HCIUART_MRVL 211 int mrvl_init(void); 212 int mrvl_deinit(void); 213 #endif 214 215 #ifdef CONFIG_BT_HCIUART_AML 216 int aml_init(void); 217 int aml_deinit(void); 218 #endif 219