[Bluetooth] Cleanup of the HCI UART driver

This patch contains the big cleanup of the HCI UART driver. The uneeded
header files are removed and their structure declarations are moved into
the protocol implementations.

Signed-off-by: Marcel Holtmann <[e-mail]>

drivers/bluetooth/hci_bcsp.c

···
-/* 
-   BlueCore Serial Protocol (BCSP) for Linux Bluetooth stack (BlueZ).
-   Copyright 2002 by Fabrizio Gennari <[e-mail]>
-
-   Based on
-       hci_h4.c  by Maxim Krasnyansky <[e-mail]>
-       ABCSP     by Carl Orsborn <[e-mail]>
-
-   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.
-*/
-
 /*
- * $Id: hci_bcsp.c,v 1.2 2002/09/26 05:05:14 maxk Exp $
+ *
+ *  Bluetooth HCI UART driver
+ *
+ *  Copyright (C) 2002-2003  Fabrizio Gennari <[e-mail]>
+ *  Copyright (C) 2004-2005  Marcel Holtmann <[e-mail]>
+ *
+ *
+ *  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 "0.3"
 
 #include <linux/config.h>
 #include <linux/module.h>
···
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
+
 #include "hci_uart.h"
-#include "hci_bcsp.h"
 
 #ifndef CONFIG_BT_HCIUART_DEBUG
 #undef  BT_DBG
 #define BT_DBG( A... )
 #endif
 
+#define VERSION "0.3"
+
 static int txcrc = 1;
 static int hciextn = 1;
+
+#define BCSP_TXWINSIZE	4
+
+#define BCSP_ACK_PKT	0x05
+#define BCSP_LE_PKT	0x06
+
+struct bcsp_struct {
+	struct sk_buff_head unack;	/* Unack'ed packets queue */
+	struct sk_buff_head rel;	/* Reliable packets queue */
+	struct sk_buff_head unrel;	/* Unreliable packets queue */
+
+	unsigned long rx_count;
+	struct	sk_buff *rx_skb;
+	u8	rxseq_txack;		/* rxseq == txack. */
+	u8	rxack;			/* Last packet sent by us that the peer ack'ed */
+	struct	timer_list tbcsp;
+
+	enum {
+		BCSP_W4_PKT_DELIMITER,
+		BCSP_W4_PKT_START,
+		BCSP_W4_BCSP_HDR,
+		BCSP_W4_DATA,
+		BCSP_W4_CRC
+	} rx_state;
+
+	enum {
+		BCSP_ESCSTATE_NOESC,
+		BCSP_ESCSTATE_ESC
+	} rx_esc_state;
+
+	u8	use_crc;
+	u16	message_crc;
+	u8	txack_req;		/* Do we need to send ack's to the peer? */
+
+	/* Reliable packet sequence number - used to assign seq to each rel pkt. */
+	u8	msgq_txseq;
+};
 
 /* ---- BCSP CRC calculation ---- */
 
···
 		rev |= (crc & 1);
 		crc = crc >> 1;
 	}
+
 	return (rev);
 }
 
···
 static void bcsp_slip_msgdelim(struct sk_buff *skb)
 {
 	const char pkt_delim = 0xc0;
+
 	memcpy(skb_put(skb, 1), &pkt_delim, 1);
 }
 
···
 
 	spin_unlock_irqrestore(&bcsp->unack.lock, flags);
 
-
 	/* We could not send a reliable packet, either because there are
 	   none or because there are too many unack'ed pkts. Did we receive
 	   any packets we have not acknowledged yet ? */
···
 		BT_ERR("Peer acked invalid packet");
 
 	BT_DBG("Removing %u pkts out of %u, up to seqno %u",
-	       pkts_to_be_removed, bcsp->unack.qlen, (seqno - 1) & 0x07);
+		pkts_to_be_removed, bcsp->unack.qlen, (seqno - 1) & 0x07);
 
 	for (i = 0, skb = ((struct sk_buff *) &bcsp->unack)->next; i < pkts_to_be_removed
 			&& skb != (struct sk_buff *) &bcsp->unack; i++) {
···
 		kfree_skb(skb);
 		skb = nskb;
 	}
+
 	if (bcsp->unack.qlen == 0)
 		del_timer(&bcsp->tbcsp);
+
 	spin_unlock_irqrestore(&bcsp->unack.lock, flags);
 
 	if (i != pkts_to_be_removed)
···
 
 		hci_recv_frame(bcsp->rx_skb);
 	}
+
 	bcsp->rx_state = BCSP_W4_PKT_DELIMITER;
 	bcsp->rx_skb = NULL;
 }
···
 
 				BT_ERR ("Checksum failed: computed %04x received %04x",
 					bcsp_crc_reverse(bcsp->message_crc),
-				     	(bcsp->rx_skb-> data[bcsp->rx_skb->len - 2] << 8) +
-				     	bcsp->rx_skb->data[bcsp->rx_skb->len - 1]);
+					(bcsp->rx_skb-> data[bcsp->rx_skb->len - 2] << 8) +
+					bcsp->rx_skb->data[bcsp->rx_skb->len - 1]);
 
 				kfree_skb(bcsp->rx_skb);
 				bcsp->rx_state = BCSP_W4_PKT_DELIMITER;
···
 				bcsp->rx_count = 4;
 				bcsp->rx_esc_state = BCSP_ESCSTATE_NOESC;
 				BCSP_CRC_INIT(bcsp->message_crc);
-				
+
 				/* Do not increment ptr or decrement count
 				 * Allocate packet. Max len of a BCSP pkt= 
 				 * 0xFFF (payload) +4 (header) +2 (crc) */
···
 }
 
 static struct hci_uart_proto bcsp = {
-	.id      = HCI_UART_BCSP,
-	.open    = bcsp_open,
-	.close   = bcsp_close,
-	.enqueue = bcsp_enqueue,
-	.dequeue = bcsp_dequeue,
-	.recv    = bcsp_recv,
-	.flush   = bcsp_flush
+	.id		= HCI_UART_BCSP,
+	.open		= bcsp_open,
+	.close		= bcsp_close,
+	.enqueue	= bcsp_enqueue,
+	.dequeue	= bcsp_dequeue,
+	.recv		= bcsp_recv,
+	.flush		= bcsp_flush
 };
 
 int bcsp_init(void)
 {
 	int err = hci_uart_register_proto(&bcsp);
+
 	if (!err)
 		BT_INFO("HCI BCSP protocol initialized");
 	else

drivers/bluetooth/hci_bcsp.h

···
-/* 
-   BlueCore Serial Protocol (BCSP) for Linux Bluetooth stack (BlueZ).
-   Copyright 2002 by Fabrizio Gennari <[e-mail]>
-
-   Based on
-       hci_h4.c  by Maxim Krasnyansky <[e-mail]>
-       ABCSP     by Carl Orsborn <[e-mail]>
-
-   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.
-*/
-
-/* 
- * $Id: hci_bcsp.h,v 1.2 2002/09/26 05:05:14 maxk Exp $
- */
-
-#ifndef __HCI_BCSP_H__
-#define __HCI_BCSP_H__
-
-#define BCSP_TXWINSIZE  4
-
-#define BCSP_ACK_PKT    0x05
-#define BCSP_LE_PKT     0x06
-
-struct bcsp_struct {
-	struct sk_buff_head unack;	/* Unack'ed packets queue */
-	struct sk_buff_head rel;	/* Reliable packets queue */
-	struct sk_buff_head unrel;	/* Unreliable packets queue */
-
-	unsigned long rx_count;
-	struct  sk_buff *rx_skb;
-	u8      rxseq_txack;		/* rxseq == txack. */
-	u8      rxack;			/* Last packet sent by us that the peer ack'ed */
-	struct  timer_list tbcsp;
-	
-	enum {
-		BCSP_W4_PKT_DELIMITER,
-		BCSP_W4_PKT_START,
-		BCSP_W4_BCSP_HDR,
-		BCSP_W4_DATA,
-		BCSP_W4_CRC
-	} rx_state;
-
-	enum {
-		BCSP_ESCSTATE_NOESC,
-		BCSP_ESCSTATE_ESC
-	} rx_esc_state;
-
-	u8	use_crc;
-	u16     message_crc;
-	u8      txack_req;		/* Do we need to send ack's to the peer? */
-
-	/* Reliable packet sequence number - used to assign seq to each rel pkt. */
-	u8      msgq_txseq;
-};
-
-#endif	/* __HCI_BCSP_H__ */

drivers/bluetooth/hci_h4.c

···
-/* 
-   BlueZ - Bluetooth protocol stack for Linux
-   Copyright (C) 2000-2001 Qualcomm Incorporated
-
-   Written 2000,2001 by Maxim Krasnyansky <[e-mail]>
-
-   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 <[e-mail]>
+ *  Copyright (C) 2004-2005  Marcel Holtmann <[e-mail]>
+ *
+ *
+ *  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>
···
 
 #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);
···
 	struct h4_struct *h4 = hu->priv;
 
 	BT_DBG("hu %p", hu);
+
 	skb_queue_purge(&h4->txq);
+
 	return 0;
 }
 
···
 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;
 }
 
···
 	/* Prepend skb with frame type */
 	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 	skb_queue_tail(&h4->txq, skb);
+
 	return 0;
 }
 
···
 	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) {
···
 	h4->rx_state = H4_W4_PACKET_TYPE;
 	h4->rx_skb   = NULL;
 	h4->rx_count = 0;
+
 	return 0;
 }
 
···
 			ptr++; count--;
 			continue;
 		};
+
 		ptr++; count--;
 
 		/* Allocate packet */
···
 			h4->rx_count = 0;
 			return 0;
 		}
+
 		h4->rx_skb->dev = (void *) hu->hdev;
 		bt_cb(h4->rx_skb)->pkt_type = type;
 	}
+
 	return count;
 }
 
···
 }
 
 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;
 }
 

drivers/bluetooth/hci_h4.h

···
-/* 
-   BlueZ - Bluetooth protocol stack for Linux
-   Copyright (C) 2000-2001 Qualcomm Incorporated
-
-   Written 2000,2001 by Maxim Krasnyansky <[e-mail]>
-
-   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.
-*/
-
-/*
- * $Id: hci_h4.h,v 1.2 2002/09/09 01:17:32 maxk Exp $
- */
-
-#ifdef __KERNEL__
-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
-
-#endif /* __KERNEL__ */

drivers/bluetooth/hci_ldisc.c

···
-/* 
-   BlueZ - Bluetooth protocol stack for Linux
-   Copyright (C) 2000-2001 Qualcomm Incorporated
-
-   Written 2000,2001 by Maxim Krasnyansky <[e-mail]>
-
-   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 driver.
  *
- * $Id: hci_ldisc.c,v 1.5 2002/10/02 18:37:20 maxk Exp $    
+ *  Bluetooth HCI UART driver
+ *
+ *  Copyright (C) 2000-2001  Qualcomm Incorporated
+ *  Copyright (C) 2002-2003  Maxim Krasnyansky <[e-mail]>
+ *  Copyright (C) 2004-2005  Marcel Holtmann <[e-mail]>
+ *
+ *
+ *  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 "2.2"
 
 #include <linux/config.h>
 #include <linux/module.h>
···
 #define BT_DBG( A... )
 #endif
 
+#define VERSION "2.2"
+
 static int reset = 0;
 
 static struct hci_uart_proto *hup[HCI_UART_MAX_PROTO];
···
 		return -EEXIST;
 
 	hup[p->id] = p;
+
 	return 0;
 }
 
···
 		return -EINVAL;
 
 	hup[p->id] = NULL;
+
 	return 0;
 }
 
···
 {
 	if (id >= HCI_UART_MAX_PROTO)
 		return NULL;
+
 	return hup[id];
 }
 
 static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type)
 {
 	struct hci_dev *hdev = hu->hdev;
-	
+
 	/* Update HCI stat counters */
 	switch (pkt_type) {
 	case HCI_COMMAND_PKT:
···
 static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu)
 {
 	struct sk_buff *skb = hu->tx_skb;
+
 	if (!skb)
 		skb = hu->proto->dequeue(hu);
 	else
 		hu->tx_skb = NULL;
+
 	return skb;
 }
 
···
 	struct tty_struct *tty = hu->tty;
 	struct hci_dev *hdev = hu->hdev;
 	struct sk_buff *skb;
-	
+
 	if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) {
 		set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
 		return 0;
···
 
 	while ((skb = hci_uart_dequeue(hu))) {
 		int len;
-	
+
 		set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
 		len = tty->driver->write(tty, skb->data, skb->len);
 		hdev->stat.byte_tx += len;
···
 			hu->tx_skb = skb;
 			break;
 		}
-	
+
 		hci_uart_tx_complete(hu, bt_cb(skb)->pkt_type);
 		kfree_skb(skb);
-	} 
-	
+	}
+
 	if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state))
 		goto restart;
 
···
 	/* Nothing to do for UART driver */
 
 	set_bit(HCI_RUNNING, &hdev->flags);
+
 	return 0;
 }
 
···
 	hu->proto->enqueue(hu, skb);
 
 	hci_uart_tx_wakeup(hu);
+
 	return 0;
 }
 
···
 {
 	struct hci_uart *hu;
 
-	if (!hdev) return;
+	if (!hdev)
+		return;
 
 	BT_DBG("%s", hdev->name);
 
···
 		BT_ERR("Can't allocate controll structure");
 		return -ENFILE;
 	}
+
 	memset(hu, 0, sizeof(struct hci_uart));
 
 	tty->disc_data = hu;
···
 	spin_lock_init(&hu->rx_lock);
 
 	/* Flush any pending characters in the driver and line discipline. */
+
 	/* FIXME: why is this needed. Note don't use ldisc_ref here as the
 	   open path is before the ldisc is referencable */
+
 	if (tty->ldisc.flush_buffer)
 		tty->ldisc.flush_buffer(tty);
 
···
 static void hci_uart_tty_receive(struct tty_struct *tty, const __u8 *data, char *flags, int count)
 {
 	struct hci_uart *hu = (void *)tty->disc_data;
-	
+
 	if (!hu || tty != hu->tty)
 		return;
 
 	if (!test_bit(HCI_UART_PROTO_SET, &hu->flags))
 		return;
-	
+
 	spin_lock(&hu->rx_lock);
 	hu->proto->recv(hu, (void *) data, count);
 	hu->hdev->stat.byte_rx += count;
···
 static int hci_uart_set_proto(struct hci_uart *hu, int id)
 {
 	struct hci_uart_proto *p;
-	int err;	
-	
+	int err;
+
 	p = hci_uart_get_proto(id);
 	if (!p)
 		return -EPROTONOSUPPORT;
···
 		p->close(hu);
 		return err;
 	}
+
 	return 0;
 }
 
···
  * Return Value:    Command dependent
  */
 static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file,
-                            unsigned int cmd, unsigned long arg)
+					unsigned int cmd, unsigned long arg)
 {
 	struct hci_uart *hu = (void *)tty->disc_data;
 	int err = 0;
···
 				return err;
 			}
 			tty->low_latency = 1;
-		} else	
+		} else
 			return -EBUSY;
 
 	case HCIUARTGETPROTO:
 		if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
 			return hu->proto->id;
 		return -EUNATCH;
-		
+
 	default:
 		err = n_tty_ioctl(tty, file, cmd, arg);
 		break;
···
 /*
  * We don't provide read/write/poll interface for user space.
  */
-static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, unsigned char __user *buf, size_t nr)
-{
-	return 0;
-}
-static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, const unsigned char *data, size_t count)
-{
-	return 0;
-}
-static unsigned int hci_uart_tty_poll(struct tty_struct *tty, struct file *filp, poll_table *wait)
+static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file,
+					unsigned char __user *buf, size_t nr)
 {
 	return 0;
 }
 
-#ifdef CONFIG_BT_HCIUART_H4
-int h4_init(void);
-int h4_deinit(void);
-#endif
-#ifdef CONFIG_BT_HCIUART_BCSP
-int bcsp_init(void);
-int bcsp_deinit(void);
-#endif
+static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file,
+					const unsigned char *data, size_t count)
+{
+	return 0;
+}
+
+static unsigned int hci_uart_tty_poll(struct tty_struct *tty,
+					struct file *filp, poll_table *wait)
+{
+	return 0;
+}
 
 static int __init hci_uart_init(void)
 {
···
 	/* Register the tty discipline */
 
 	memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc));
-	hci_uart_ldisc.magic       = TTY_LDISC_MAGIC;
-	hci_uart_ldisc.name        = "n_hci";
-	hci_uart_ldisc.open        = hci_uart_tty_open;
-	hci_uart_ldisc.close       = hci_uart_tty_close;
-	hci_uart_ldisc.read        = hci_uart_tty_read;
-	hci_uart_ldisc.write       = hci_uart_tty_write;
-	hci_uart_ldisc.ioctl       = hci_uart_tty_ioctl;
-	hci_uart_ldisc.poll        = hci_uart_tty_poll;
-	hci_uart_ldisc.receive_room= hci_uart_tty_room;
-	hci_uart_ldisc.receive_buf = hci_uart_tty_receive;
-	hci_uart_ldisc.write_wakeup= hci_uart_tty_wakeup;
-	hci_uart_ldisc.owner       = THIS_MODULE;
+	hci_uart_ldisc.magic		= TTY_LDISC_MAGIC;
+	hci_uart_ldisc.name		= "n_hci";
+	hci_uart_ldisc.open		= hci_uart_tty_open;
+	hci_uart_ldisc.close		= hci_uart_tty_close;
+	hci_uart_ldisc.read		= hci_uart_tty_read;
+	hci_uart_ldisc.write		= hci_uart_tty_write;
+	hci_uart_ldisc.ioctl		= hci_uart_tty_ioctl;
+	hci_uart_ldisc.poll		= hci_uart_tty_poll;
+	hci_uart_ldisc.receive_room	= hci_uart_tty_room;
+	hci_uart_ldisc.receive_buf	= hci_uart_tty_receive;
+	hci_uart_ldisc.write_wakeup	= hci_uart_tty_wakeup;
+	hci_uart_ldisc.owner		= THIS_MODULE;
 
 	if ((err = tty_register_ldisc(N_HCI, &hci_uart_ldisc))) {
 		BT_ERR("HCI line discipline registration failed. (%d)", err);

drivers/bluetooth/hci_uart.h

···
-/* 
-   BlueZ - Bluetooth protocol stack for Linux
-   Copyright (C) 2000-2001 Qualcomm Incorporated
-
-   Written 2000,2001 by Maxim Krasnyansky <[e-mail]>
-
-   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.
-*/
-
 /*
- * $Id: hci_uart.h,v 1.2 2002/09/09 01:17:32 maxk Exp $
+ *
+ *  Bluetooth HCI UART driver
+ *
+ *  Copyright (C) 2000-2001  Qualcomm Incorporated
+ *  Copyright (C) 2002-2003  Maxim Krasnyansky <[e-mail]>
+ *  Copyright (C) 2004-2005  Marcel Holtmann <[e-mail]>
+ *
+ *
+ *  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
+ *
  */
 
-#ifndef N_HCI 
+#ifndef N_HCI
 #define N_HCI	15
 #endif
 
···
 #define HCI_UART_3WIRE	2
 #define HCI_UART_H4DS	3
 
-#ifdef __KERNEL__
 struct hci_uart;
 
 struct hci_uart_proto {
···
 };
 
 struct hci_uart {
-	struct tty_struct  *tty;
-	struct hci_dev     *hdev;
-	unsigned long      flags;
+	struct tty_struct	*tty;
+	struct hci_dev		*hdev;
+	unsigned long		flags;
 
-	struct hci_uart_proto *proto;
-	void               *priv;
-	
-	struct sk_buff     *tx_skb;
-	unsigned long      tx_state;
-	spinlock_t         rx_lock;
+	struct hci_uart_proto	*proto;
+	void			*priv;
+
+	struct sk_buff		*tx_skb;
+	unsigned long		tx_state;
+	spinlock_t		rx_lock;
 };
 
 /* HCI_UART flag bits */
-#define HCI_UART_PROTO_SET		0
+#define HCI_UART_PROTO_SET	0
 
 /* TX states  */
-#define HCI_UART_SENDING		1
-#define HCI_UART_TX_WAKEUP		2
+#define HCI_UART_SENDING	1
+#define HCI_UART_TX_WAKEUP	2
 
 int hci_uart_register_proto(struct hci_uart_proto *p);
 int hci_uart_unregister_proto(struct hci_uart_proto *p);
 int hci_uart_tx_wakeup(struct hci_uart *hu);
 
-#endif /* __KERNEL__ */
+#ifdef CONFIG_BT_HCIUART_H4
+int h4_init(void);
+int h4_deinit(void);
+#endif
+
+#ifdef CONFIG_BT_HCIUART_BCSP
+int bcsp_init(void);
+int bcsp_deinit(void);
+#endif