Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/module.h> |
| 27 | |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/types.h> |
| 31 | #include <linux/fcntl.h> |
| 32 | #include <linux/interrupt.h> |
| 33 | #include <linux/ptrace.h> |
| 34 | #include <linux/poll.h> |
| 35 | |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/tty.h> |
| 38 | #include <linux/errno.h> |
| 39 | #include <linux/string.h> |
| 40 | #include <linux/signal.h> |
| 41 | #include <linux/ioctl.h> |
| 42 | #include <linux/skbuff.h> |
| 43 | |
| 44 | #include <net/bluetooth/bluetooth.h> |
| 45 | #include <net/bluetooth/hci_core.h> |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include "hci_uart.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 49 | #define VERSION "1.2" |
| 50 | |
| 51 | struct h4_struct { |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 52 | struct sk_buff_head txq; |
| 53 | }; |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | /* Initialize protocol */ |
| 56 | static int h4_open(struct hci_uart *hu) |
| 57 | { |
| 58 | struct h4_struct *h4; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 59 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | BT_DBG("hu %p", hu); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 61 | |
David Herrmann | fdcd166 | 2012-01-07 15:19:38 +0100 | [diff] [blame] | 62 | h4 = kzalloc(sizeof(*h4), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | if (!h4) |
| 64 | return -ENOMEM; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | skb_queue_head_init(&h4->txq); |
| 67 | |
| 68 | hu->priv = h4; |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | /* Flush protocol data */ |
| 73 | static int h4_flush(struct hci_uart *hu) |
| 74 | { |
| 75 | struct h4_struct *h4 = hu->priv; |
| 76 | |
| 77 | BT_DBG("hu %p", hu); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | skb_queue_purge(&h4->txq); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | /* Close protocol */ |
| 85 | static int h4_close(struct hci_uart *hu) |
| 86 | { |
| 87 | struct h4_struct *h4 = hu->priv; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 88 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | hu->priv = NULL; |
| 90 | |
| 91 | BT_DBG("hu %p", hu); |
| 92 | |
| 93 | skb_queue_purge(&h4->txq); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | hu->priv = NULL; |
| 96 | kfree(h4); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | /* Enqueue frame for transmittion (padding, crc, etc) */ |
| 102 | static int h4_enqueue(struct hci_uart *hu, struct sk_buff *skb) |
| 103 | { |
| 104 | struct h4_struct *h4 = hu->priv; |
| 105 | |
| 106 | BT_DBG("hu %p skb %p", hu, skb); |
| 107 | |
| 108 | /* Prepend skb with frame type */ |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 109 | memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | skb_queue_tail(&h4->txq, skb); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | return 0; |
| 113 | } |
| 114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | /* Recv data */ |
Marcel Holtmann | 9d1c40e | 2015-04-04 20:59:41 -0700 | [diff] [blame^] | 116 | static int h4_recv(struct hci_uart *hu, const void *data, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
Gustavo F. Padovan | b86ed36 | 2011-04-07 18:53:45 -0300 | [diff] [blame] | 118 | int ret; |
| 119 | |
Chan-yeol Park | c257820 | 2013-04-02 21:24:21 +0900 | [diff] [blame] | 120 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) |
| 121 | return -EUNATCH; |
| 122 | |
Gustavo F. Padovan | b86ed36 | 2011-04-07 18:53:45 -0300 | [diff] [blame] | 123 | ret = hci_recv_stream_fragment(hu->hdev, data, count); |
| 124 | if (ret < 0) { |
Gustavo F. Padovan | e9da101 | 2010-07-24 01:46:57 -0300 | [diff] [blame] | 125 | BT_ERR("Frame Reassembly Failed"); |
Gustavo F. Padovan | b86ed36 | 2011-04-07 18:53:45 -0300 | [diff] [blame] | 126 | return ret; |
| 127 | } |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | return count; |
| 130 | } |
| 131 | |
| 132 | static struct sk_buff *h4_dequeue(struct hci_uart *hu) |
| 133 | { |
| 134 | struct h4_struct *h4 = hu->priv; |
| 135 | return skb_dequeue(&h4->txq); |
| 136 | } |
| 137 | |
| 138 | static struct hci_uart_proto h4p = { |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 139 | .id = HCI_UART_H4, |
| 140 | .open = h4_open, |
| 141 | .close = h4_close, |
| 142 | .recv = h4_recv, |
| 143 | .enqueue = h4_enqueue, |
| 144 | .dequeue = h4_dequeue, |
| 145 | .flush = h4_flush, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | }; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 147 | |
Gustavo F. Padovan | f2b94bb | 2010-07-24 02:04:44 -0300 | [diff] [blame] | 148 | int __init h4_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | { |
| 150 | int err = hci_uart_register_proto(&h4p); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | if (!err) |
| 153 | BT_INFO("HCI H4 protocol initialized"); |
| 154 | else |
| 155 | BT_ERR("HCI H4 protocol registration failed"); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | return err; |
| 158 | } |
| 159 | |
Gustavo F. Padovan | f2b94bb | 2010-07-24 02:04:44 -0300 | [diff] [blame] | 160 | int __exit h4_deinit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | { |
| 162 | return hci_uart_unregister_proto(&h4p); |
| 163 | } |