diff options
Diffstat (limited to 'drivers/bluetooth/hci_h4.c')
| -rw-r--r-- | drivers/bluetooth/hci_h4.c | 101 |
1 files changed, 62 insertions, 39 deletions
diff --git a/drivers/bluetooth/hci_h4.c b/drivers/bluetooth/hci_h4.c index cf8a22d58d96..12e369a66fc2 100644 --- a/drivers/bluetooth/hci_h4.c +++ b/drivers/bluetooth/hci_h4.c @@ -1,33 +1,27 @@ -/* - BlueZ - Bluetooth protocol stack for Linux - Copyright (C) 2000-2001 Qualcomm Incorporated - - Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License version 2 as - published by the Free Software Foundation; - - THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. - IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY - CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES - WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - - ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, - COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS - SOFTWARE IS DISCLAIMED. -*/ - /* - * Bluetooth HCI UART(H4) protocol. * - * $Id: hci_h4.c,v 1.3 2002/09/09 01:17:32 maxk Exp $ + * 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 + * */ -#define VERSION "1.2" #include <linux/config.h> #include <linux/module.h> @@ -51,24 +45,41 @@ #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> + #include "hci_uart.h" -#include "hci_h4.h" #ifndef CONFIG_BT_HCIUART_DEBUG #undef BT_DBG #define BT_DBG( A... ) #endif +#define VERSION "1.2" + +struct h4_struct { + unsigned long rx_state; + unsigned long rx_count; + struct sk_buff *rx_skb; + struct sk_buff_head txq; +}; + +/* H4 receiver States */ +#define H4_W4_PACKET_TYPE 0 +#define H4_W4_EVENT_HDR 1 +#define H4_W4_ACL_HDR 2 +#define H4_W4_SCO_HDR 3 +#define H4_W4_DATA 4 + /* Initialize protocol */ static int h4_open(struct hci_uart *hu) { struct h4_struct *h4; - + BT_DBG("hu %p", hu); - + h4 = kmalloc(sizeof(*h4), GFP_ATOMIC); if (!h4) return -ENOMEM; + memset(h4, 0, sizeof(*h4)); skb_queue_head_init(&h4->txq); @@ -83,7 +94,9 @@ 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; } @@ -91,16 +104,19 @@ static int h4_flush(struct hci_uart *hu) 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); + if (h4->rx_skb) kfree_skb(h4->rx_skb); hu->priv = NULL; kfree(h4); + return 0; } @@ -114,6 +130,7 @@ static int h4_enqueue(struct hci_uart *hu, struct sk_buff *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; } @@ -122,6 +139,7 @@ static inline int h4_check_data_len(struct h4_struct *h4, int len) register int room = skb_tailroom(h4->rx_skb); BT_DBG("len %d room %d", len, room); + if (!len) { hci_recv_frame(h4->rx_skb); } else if (len > room) { @@ -136,6 +154,7 @@ static inline int h4_check_data_len(struct h4_struct *h4, int len) h4->rx_state = H4_W4_PACKET_TYPE; h4->rx_skb = NULL; h4->rx_count = 0; + return 0; } @@ -228,6 +247,7 @@ static int h4_recv(struct hci_uart *hu, void *data, int count) ptr++; count--; continue; }; + ptr++; count--; /* Allocate packet */ @@ -238,9 +258,11 @@ static int h4_recv(struct hci_uart *hu, void *data, int count) h4->rx_count = 0; return 0; } + h4->rx_skb->dev = (void *) hu->hdev; bt_cb(h4->rx_skb)->pkt_type = type; } + return count; } @@ -251,23 +273,24 @@ static struct sk_buff *h4_dequeue(struct hci_uart *hu) } 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, + .id = HCI_UART_H4, + .open = h4_open, + .close = h4_close, + .recv = h4_recv, + .enqueue = h4_enqueue, + .dequeue = h4_dequeue, + .flush = h4_flush, }; - + int 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; } |