1 /* 2 * 3 * Bluetooth HCI UART driver 4 * 5 * Copyright (C) 2000-2001 Qualcomm Incorporated 6 * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> 7 * Copyright (C) 2004-2005 Marcel Holtmann <marcel@holtmann.org> 8 * 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 */ 25 #include <linux/version.h> 26 #include <net/bluetooth/bluetooth.h> 27 #include <net/bluetooth/hci_core.h> 28 29 /* #define HCI_VERSION_CODE KERNEL_VERSION(3, 14, 41) */ 30 #define HCI_VERSION_CODE LINUX_VERSION_CODE 31 32 #ifndef N_HCI 33 #define N_HCI 15 34 #endif 35 36 #ifndef CONFIG_BT_HCIUART_H4 37 #define CONFIG_BT_HCIUART_H4 38 #endif 39 40 #define BTCOEX 41 42 /* Send host sleep notification to Controller */ 43 #define WOBT_NOTIFY 0 /* 1 enable; 0 disable */ 44 45 /* Send LE whitelist only for Background scan parameters */ 46 #define WOBT_NOTIFY_BG_SCAN_LE_WHITELIST_ONLY (0 * WOBT_NOTIFY) /* 1 enable; 0 disable */ 47 48 /* RTKBT Power-on Whitelist for sideband wake-up by LE Advertising from Remote. 49 * Note that it's necessary to apply TV FW Patch. */ 50 #define RTKBT_TV_POWERON_WHITELIST (0 * WOBT_NOTIFY) /* 1 enable; 0 disable */ 51 52 /* RTKBT Power-on Data Filter for Manufacturer field */ 53 /* Note that please edit the datafilter in 54 * rtkbt_set_le_device_poweron_data_filter() of hci_ldisc.c */ 55 #define RTKBT_TV_POWERON_DATA_FILTER (0 * WOBT_NOTIFY) /* 1 enable; 0 disable */ 56 57 /* Ioctls */ 58 #define HCIUARTSETPROTO _IOW('U', 200, int) 59 #define HCIUARTGETPROTO _IOR('U', 201, int) 60 #define HCIUARTGETDEVICE _IOR('U', 202, int) 61 #define HCIUARTSETFLAGS _IOW('U', 203, int) 62 #define HCIUARTGETFLAGS _IOR('U', 204, int) 63 64 /* UART protocols */ 65 #define HCI_UART_MAX_PROTO 6 66 67 #define HCI_UART_H4 0 68 #define HCI_UART_BCSP 1 69 #define HCI_UART_3WIRE 2 70 #define HCI_UART_H4DS 3 71 #define HCI_UART_LL 4 72 #define HCI_UART_ATH3K 5 73 74 #define HCI_UART_RAW_DEVICE 0 75 #define HCI_UART_RESET_ON_INIT 1 76 #define HCI_UART_CREATE_AMP 2 77 #define HCI_UART_INIT_PENDING 3 78 #define HCI_UART_EXT_CONFIG 4 79 #define HCI_UART_VND_DETECT 5 80 81 struct hci_uart; 82 83 struct hci_uart_proto { 84 unsigned int id; 85 int (*open)(struct hci_uart *hu); 86 int (*close)(struct hci_uart *hu); 87 int (*flush)(struct hci_uart *hu); 88 int (*recv)(struct hci_uart *hu, void *data, int len); 89 int (*enqueue)(struct hci_uart *hu, struct sk_buff *skb); 90 struct sk_buff *(*dequeue)(struct hci_uart *hu); 91 }; 92 93 struct hci_uart { 94 struct tty_struct *tty; 95 struct hci_dev *hdev; 96 unsigned long flags; 97 unsigned long hdev_flags; 98 99 struct work_struct write_work; 100 struct workqueue_struct *hci_uart_wq; 101 102 struct hci_uart_proto *proto; 103 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0) 104 struct percpu_rw_semaphore proto_lock; /* Stop work for proto close */ 105 #else 106 struct rw_semaphore proto_lock; 107 #endif 108 void *priv; 109 110 struct semaphore tx_sem; /* semaphore for tx */ 111 112 struct sk_buff *tx_skb; 113 unsigned long tx_state; 114 115 #if WOBT_NOTIFY 116 struct notifier_block pm_notify_block; 117 #endif 118 }; 119 120 /* HCI_UART proto flag bits */ 121 #define HCI_UART_PROTO_SET 0 122 #define HCI_UART_REGISTERED 1 123 #define HCI_UART_PROTO_READY 2 124 125 /* TX states */ 126 #define HCI_UART_SENDING 1 127 #define HCI_UART_TX_WAKEUP 2 128 129 extern int hci_uart_register_proto(struct hci_uart_proto *p); 130 extern int hci_uart_unregister_proto(struct hci_uart_proto *p); 131 extern int hci_uart_tx_wakeup(struct hci_uart *hu); 132 133 #ifdef CONFIG_BT_HCIUART_H4 134 extern int h4_init(void); 135 extern int h4_deinit(void); 136 #endif 137 138 extern int h5_init(void); 139 extern int h5_deinit(void); 140 141 #if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0) 142 extern int hci_uart_send_frame(struct sk_buff *skb); 143 #else 144 extern int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb); 145 #endif 146