| /* |
| * |
| * Bluetooth HCI UART driver |
| * |
| * Copyright (C) 2000-2001 Qualcomm Incorporated |
| * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> |
| * Copyright (C) 2004-2005 Marcel Holtmann <marcel@holtmann.org> |
| * |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include <linux/module.h> |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/fcntl.h> |
| #include <linux/interrupt.h> |
| #include <linux/ptrace.h> |
| #include <linux/poll.h> |
| |
| #include <linux/slab.h> |
| #include <linux/tty.h> |
| #include <linux/errno.h> |
| #include <linux/string.h> |
| #include <linux/signal.h> |
| #include <linux/ioctl.h> |
| #include <linux/skbuff.h> |
| |
| #include <net/bluetooth/bluetooth.h> |
| #include <net/bluetooth/hci_core.h> |
| |
| #include "hci_uart.h" |
| |
| #define VERSION "1.2" |
| |
| struct h4_struct { |
| struct sk_buff_head txq; |
| }; |
| |
| /* Initialize protocol */ |
| static int h4_open(struct hci_uart *hu) |
| { |
| struct h4_struct *h4; |
| |
| BT_DBG("hu %p", hu); |
| |
| h4 = kzalloc(sizeof(*h4), GFP_KERNEL); |
| if (!h4) |
| return -ENOMEM; |
| |
| skb_queue_head_init(&h4->txq); |
| |
| hu->priv = h4; |
| return 0; |
| } |
| |
| /* Flush protocol data */ |
| static int h4_flush(struct hci_uart *hu) |
| { |
| struct h4_struct *h4 = hu->priv; |
| |
| BT_DBG("hu %p", hu); |
| |
| skb_queue_purge(&h4->txq); |
| |
| return 0; |
| } |
| |
| /* Close protocol */ |
| static int h4_close(struct hci_uart *hu) |
| { |
| struct h4_struct *h4 = hu->priv; |
| |
| hu->priv = NULL; |
| |
| BT_DBG("hu %p", hu); |
| |
| skb_queue_purge(&h4->txq); |
| |
| hu->priv = NULL; |
| kfree(h4); |
| |
| return 0; |
| } |
| |
| /* Enqueue frame for transmittion (padding, crc, etc) */ |
| static int h4_enqueue(struct hci_uart *hu, struct sk_buff *skb) |
| { |
| struct h4_struct *h4 = hu->priv; |
| |
| BT_DBG("hu %p skb %p", hu, skb); |
| |
| /* Prepend skb with frame type */ |
| memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); |
| skb_queue_tail(&h4->txq, skb); |
| |
| return 0; |
| } |
| |
| /* Recv data */ |
| static int h4_recv(struct hci_uart *hu, const void *data, int count) |
| { |
| int ret; |
| |
| if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) |
| return -EUNATCH; |
| |
| ret = hci_recv_stream_fragment(hu->hdev, data, count); |
| if (ret < 0) { |
| BT_ERR("Frame Reassembly Failed"); |
| return ret; |
| } |
| |
| return count; |
| } |
| |
| static struct sk_buff *h4_dequeue(struct hci_uart *hu) |
| { |
| struct h4_struct *h4 = hu->priv; |
| return skb_dequeue(&h4->txq); |
| } |
| |
| static struct hci_uart_proto h4p = { |
| .id = HCI_UART_H4, |
| .open = h4_open, |
| .close = h4_close, |
| .recv = h4_recv, |
| .enqueue = h4_enqueue, |
| .dequeue = h4_dequeue, |
| .flush = h4_flush, |
| }; |
| |
| int __init h4_init(void) |
| { |
| int err = hci_uart_register_proto(&h4p); |
| |
| if (!err) |
| BT_INFO("HCI H4 protocol initialized"); |
| else |
| BT_ERR("HCI H4 protocol registration failed"); |
| |
| return err; |
| } |
| |
| int __exit h4_deinit(void) |
| { |
| return hci_uart_unregister_proto(&h4p); |
| } |