drivers/bluetooth: remove unused hci_rtk_h5 driver

Change-Id: I1eb38b3e997b94ed62b053f271de08b3b2801a0b
Signed-off-by: Tao Huang <huangtao@rock-chips.com>

1 files changed, 0 insertions, 846 deletions

diff --git a/drivers/bluetooth/hci_rtk_h5.c b/drivers/bluetooth/hci_rtk_h5.c
deleted file mode 100644
index 201b1aa805e9..000000000000
--- a/drivers/bluetooth/hci_rtk_h5.c
+++ /dev/null
@@ -1,846 +0,0 @@
-/*
- *
- *  Bluetooth HCI UART driver
- *
- *  Copyright (C) 2011-2014  wifi_fae<wifi_fae@realtek.com.tw>
- *
- *
- *  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 <linux/bitrev.h>
-#include <asm/unaligned.h>
-
-#include <net/bluetooth/bluetooth.h>
-#include <net/bluetooth/hci_core.h>
-
-#include "hci_uart.h"
-
-#define VERSION "1.0"
-
-static int txcrc = 1;
-//static int hciextn = 1;
-
-#define H5_TXWINSIZE	4
-#define H5_ACK_PKT	0x00
-#define H5_LE_PKT	    0x0F
-#define H5_VDRSPEC_PKT	0x0E
-
-struct h5_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 th5;
-
-	enum {
-		H5_W4_PKT_DELIMITER,
-		H5_W4_PKT_START,
-		H5_W4_HDR,
-		H5_W4_DATA,
-		H5_W4_CRC
-	} rx_state;
-
-	enum {
-		H5_ESCSTATE_NOESC,
-		H5_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;
-};
-
-/* ---- H5 CRC calculation ---- */
-
-/* Table for calculating CRC for polynomial 0x1021, LSB processed first,
-initial value 0xffff, bits shifted in reverse order. */
-
-static const u16 crc_table[] = {
-	0x0000, 0x1081, 0x2102, 0x3183,
-	0x4204, 0x5285, 0x6306, 0x7387,
-	0x8408, 0x9489, 0xa50a, 0xb58b,
-	0xc60c, 0xd68d, 0xe70e, 0xf78f
-};
-
-/* Initialise the crc calculator */
-#define H5_CRC_INIT(x) x = 0xffff
-
-/*
-   Update crc with next data byte
-
-   Implementation note
-        The data byte is treated as two nibbles.  The crc is generated
-        in reverse, i.e., bits are fed into the register from the top.
-*/
-static void h5_crc_update(u16 *crc, u8 d)
-{
-	u16 reg = *crc;
-
-	reg = (reg >> 4) ^ crc_table[(reg ^ d) & 0x000f];
-	reg = (reg >> 4) ^ crc_table[(reg ^ (d >> 4)) & 0x000f];
-
-	*crc = reg;
-}
-
-/* ---- H5 core ---- */
-
-static void h5_slip_msgdelim(struct sk_buff *skb)
-{
-	const char pkt_delim = 0xc0;
-
-	memcpy(skb_put(skb, 1), &pkt_delim, 1);
-}
-
-static void h5_slip_one_byte(struct sk_buff *skb, u8 c)
-{
-	const char esc_c0[2] = { 0xdb, 0xdc };
-	const char esc_db[2] = { 0xdb, 0xdd };
-	const char esc_11[2] = { 0xdb, 0xde };
-	const char esc_13[2] = { 0xdb, 0xdf };
-	
-	switch (c) {
-	case 0xc0:
-		memcpy(skb_put(skb, 2), &esc_c0, 2);
-		break;
-	case 0xdb:
-		memcpy(skb_put(skb, 2), &esc_db, 2);
-		break;
-	case 0x11:
-		memcpy(skb_put(skb, 2), &esc_11, 2);
-		break;
-	case 0x13:
-		memcpy(skb_put(skb, 2), &esc_13, 2);
-		break;
-	default:
-		memcpy(skb_put(skb, 1), &c, 1);
-	}
-}
-
-static int h5_enqueue(struct hci_uart *hu, struct sk_buff *skb)
-{
-	struct h5_struct *h5 = hu->priv;
-
-	if (skb->len > 0xFFF) { //Pkt length must be less than 4095 bytes    
-		BT_ERR("Packet too long");
-		kfree_skb(skb);
-		return 0;
-	}
-
-	switch (bt_cb(skb)->pkt_type) {
-	case HCI_ACLDATA_PKT:
-	case HCI_COMMAND_PKT:
-	    skb_queue_tail(&h5->rel, skb);
-	    break;
-
-	case HCI_SCODATA_PKT:
-	    skb_queue_tail(&h5->unrel, skb);
-	    break;
-	case H5_LE_PKT:
-	case H5_ACK_PKT:
-	case H5_VDRSPEC_PKT:
-	    skb_queue_tail(&h5->unrel, skb);	/* 3-wire LinkEstablishment*/
-	    break;
-		
-	default:
-	    BT_ERR("Unknown packet type");
-	    kfree_skb(skb);
-	    break;
-	}
-
-	return 0;
-}
-
-static struct sk_buff *h5_prepare_pkt(struct h5_struct *h5, u8 *data,
-		int len, int pkt_type)
-{
-	struct sk_buff *nskb;
-	u8 hdr[4], chan;
-	u16 H5_CRC_INIT(h5_txmsg_crc);
-	int rel, i;
-
-	switch (pkt_type) {
-	case HCI_ACLDATA_PKT:
-	    chan = 2;	/* 3-wire ACL channel */
-	    rel = 1;	/* reliable channel */
-	    break;
-	case HCI_COMMAND_PKT:
-	    chan = 1;	/* 3-wire cmd channel */
-	    rel = 1;	/* reliable channel */
-	    break;
-	case HCI_EVENT_PKT:
-	    chan = 4;	/* 3-wire cmd channel */
-	    rel = 1;	/* reliable channel */
-	    break;
-	case HCI_SCODATA_PKT:
-	    chan = 3;	/* 3-wire SCO channel */
-	    rel = 0;	/* unreliable channel */   
-            break;
-	case H5_LE_PKT:
-	    chan = 15;	/* 3-wire LinkEstablishment channel */
-	    rel = 0;	/* unreliable channel */
-	    break;
-	case H5_ACK_PKT:
-	    chan = 0;	/* 3-wire ACK channel */
-	    rel = 0;	/* unreliable channel */
-	    break;
-	case H5_VDRSPEC_PKT:
-	    chan = 14;	/* 3-wire Vendor Specific channel */
-	    rel = 0;	/* unreliable channel */
-	    break;
-	default:
-	    BT_ERR("Unknown packet type");
-	    return NULL;
-	}
-
-
-	/* Max len of packet: (original len +4(h5 hdr) +2(crc))*2
-	   (because bytes 0xc0 and 0xdb are escaped, worst case is
-	   when the packet is all made of 0xc0 and 0xdb :) )
-	   + 2 (0xc0 delimiters at start and end). */
-
-	nskb = alloc_skb((len + 6) * 2 + 2, GFP_ATOMIC);
-	if (!nskb)
-		return NULL;
-
-	bt_cb(nskb)->pkt_type = pkt_type;
-
-	h5_slip_msgdelim(nskb);
-
-	hdr[0] = h5->rxseq_txack << 3;
-	h5->txack_req = 0;
-	BT_DBG("We request packet no %u to card", h5->rxseq_txack);
-
-	if (rel) {
-		hdr[0] |= 0x80 + h5->msgq_txseq;
-		BT_DBG("Sending packet with seqno %u", h5->msgq_txseq);
-		h5->msgq_txseq = (h5->msgq_txseq + 1) & 0x07;
-	}
-
-	if (h5->use_crc)
-		hdr[0] |= 0x40;
-
-	hdr[1] = ((len << 4) & 0xff) | chan;
-	hdr[2] = len >> 4;
-	hdr[3] = ~(hdr[0] + hdr[1] + hdr[2]);
-
-	/* Put H5 header */
-	for (i = 0; i < 4; i++) {
-		h5_slip_one_byte(nskb, hdr[i]);
-
-		if (h5->use_crc)
-			h5_crc_update(&h5_txmsg_crc, hdr[i]);
-	}
-
-	/* Put payload */
-	for (i = 0; i < len; i++) {
-		h5_slip_one_byte(nskb, data[i]);
-
-		if (h5->use_crc)
-			h5_crc_update(&h5_txmsg_crc, data[i]);
-	}
-
-	/* Put CRC */
-	if (h5->use_crc) {
-		h5_txmsg_crc = bitrev16(h5_txmsg_crc);
-		h5_slip_one_byte(nskb, (u8) ((h5_txmsg_crc >> 8) & 0x00ff));
-		h5_slip_one_byte(nskb, (u8) (h5_txmsg_crc & 0x00ff));
-	}
-
-	h5_slip_msgdelim(nskb);
-	return nskb;
-}
-
-/* This is a rewrite of pkt_avail in AH5 */
-static struct sk_buff *h5_dequeue(struct hci_uart *hu)
-{
-	struct h5_struct *h5 = hu->priv;
-	unsigned long flags;
-	struct sk_buff *skb;
-	
-	/* First of all, check for unreliable messages in the queue,
-	   since they have priority */
-
-	if ((skb = skb_dequeue(&h5->unrel)) != NULL) {
-		struct sk_buff *nskb = h5_prepare_pkt(h5, skb->data, skb->len, bt_cb(skb)->pkt_type);
-		if (nskb) {
-			kfree_skb(skb);
-			return nskb;
-		} else {
-			skb_queue_head(&h5->unrel, skb);
-			BT_ERR("Could not dequeue pkt because alloc_skb failed");
-		}
-	}
-
-	/* Now, try to send a reliable pkt. We can only send a
-	   reliable packet if the number of packets sent but not yet ack'ed
-	   is < than the winsize */
-
-	spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING);
-
-	if (h5->unack.qlen < H5_TXWINSIZE && (skb = skb_dequeue(&h5->rel)) != NULL) {
-		struct sk_buff *nskb = h5_prepare_pkt(h5, skb->data, skb->len, bt_cb(skb)->pkt_type);
-		if (nskb) {
-			__skb_queue_tail(&h5->unack, skb);
-			mod_timer(&h5->th5, jiffies + HZ / 4);
-			spin_unlock_irqrestore(&h5->unack.lock, flags);
-			return nskb;
-		} else {
-			skb_queue_head(&h5->rel, skb);
-			BT_ERR("Could not dequeue pkt because alloc_skb failed");
-		}
-	}
-
-	spin_unlock_irqrestore(&h5->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 ? */
-
-	if (h5->txack_req) {
-		/* if so, craft an empty ACK pkt and send it on H5 unreliable
-		   channel 0 */
-		struct sk_buff *nskb = h5_prepare_pkt(h5, NULL, 0, H5_ACK_PKT);
-		return nskb;
-	}
-
-	/* We have nothing to send */
-	return NULL;
-}
-
-static int h5_flush(struct hci_uart *hu)
-{
-	BT_DBG("hu %p", hu);
-	return 0;
-}
-
-/* Remove ack'ed packets */
-static void h5_pkt_cull(struct h5_struct *h5)
-{
-	struct sk_buff *skb, *tmp;
-	unsigned long flags;
-	int i, pkts_to_be_removed;
-	u8 seqno;
-
-	spin_lock_irqsave(&h5->unack.lock, flags);
-
-	pkts_to_be_removed = skb_queue_len(&h5->unack);
-	seqno = h5->msgq_txseq;
-
-	while (pkts_to_be_removed) {
-		if (h5->rxack == seqno)
-			break;
-		pkts_to_be_removed--;
-		seqno = (seqno - 1) & 0x07;
-	}
-
-	if (h5->rxack != seqno)
-		BT_ERR("Peer acked invalid packet");
-
-	BT_DBG("Removing %u pkts out of %u, up to seqno %u",
-	       pkts_to_be_removed, skb_queue_len(&h5->unack),
-	       (seqno - 1) & 0x07);
-
-	i = 0;
-	skb_queue_walk_safe(&h5->unack, skb, tmp) {
-		if (i >= pkts_to_be_removed)
-			break;
-		i++;
-
-		__skb_unlink(skb, &h5->unack);
-		kfree_skb(skb);
-	}
-
-	if (skb_queue_empty(&h5->unack))
-		del_timer(&h5->th5);
-
-	spin_unlock_irqrestore(&h5->unack.lock, flags);
-
-	if (i != pkts_to_be_removed)
-		BT_ERR("Removed only %u out of %u pkts", i, pkts_to_be_removed);
-}
-
-/* Handle H5 link-establishment packets. When we
-   detect a "sync" packet, symptom that the BT module has reset,
-   we do nothing :) (yet) */
-static void h5_handle_le_pkt(struct hci_uart *hu)
-{
-	struct h5_struct *h5 = hu->priv;
-	u8 conf_pkt[2]     = { 0x03, 0xfc};
-	u8 conf_rsp_pkt[3] = { 0x04, 0x7b, 0x00};
-	u8 sync_pkt[2]     = { 0x01, 0x7e};
-	u8 sync_rsp_pkt[2] = { 0x02, 0x7d};
-
-	u8 wakeup_pkt[2]   = { 0x05, 0xfa};
-	u8 woken_pkt[2]    = { 0x06, 0xf9};
-	u8 sleep_pkt[2]    = { 0x07, 0x78};
-
-	/* spot "conf" pkts and reply with a "conf rsp" pkt */
-	if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 &&
-			!memcmp(&h5->rx_skb->data[4], conf_pkt, 2)) {
-		struct sk_buff *nskb = alloc_skb(3, GFP_ATOMIC);
-
-		BT_DBG("Found a LE conf pkt");
-		if (!nskb)
-			return;
-
-		conf_rsp_pkt[2] |= txcrc << 0x4; //crc check enable, version no = 0. needed to be as avariable.
-		memcpy(skb_put(nskb, 3), conf_rsp_pkt, 3);
-		bt_cb(nskb)->pkt_type = H5_LE_PKT;
-
-		skb_queue_head(&h5->unrel, nskb);
-		hci_uart_tx_wakeup(hu);
-	}
-	/* spot "conf resp" pkts*/
-	else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 &&
-			!memcmp(&h5->rx_skb->data[4], conf_rsp_pkt, 2)) {
-		BT_DBG("Found a LE conf resp pkt, device go into active state");
-	        txcrc = (h5->rx_skb->data[6] >> 0x4) & 0x1;
-	}
-
-	/* Spot "sync" pkts. If we find one...disaster! */
-	else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 &&
-			!memcmp(&h5->rx_skb->data[4], sync_pkt, 2)) {
-		BT_ERR("Found a LE sync pkt, card has reset");
-		//DO Something here
-	}
-	/* Spot "sync resp" pkts. If we find one...disaster! */
-	else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 &&
-			!memcmp(&h5->rx_skb->data[4], sync_rsp_pkt, 2)) {
-		BT_ERR("Found a LE sync resp pkt, device go into initialized state");
-		//      DO Something here
-	}
-	/* Spot "wakeup" pkts. reply woken message when in active mode */
-	else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 &&
-			!memcmp(&h5->rx_skb->data[4], wakeup_pkt, 2)) {
-		struct sk_buff *nskb = alloc_skb(2, GFP_ATOMIC);
-
-		BT_ERR("Found a LE Wakeup pkt, and reply woken message");
-		//      DO Something here
-
-		memcpy(skb_put(nskb, 2), woken_pkt, 2);
-		bt_cb(nskb)->pkt_type = H5_LE_PKT;
-
-		skb_queue_head(&h5->unrel, nskb);
-		hci_uart_tx_wakeup(hu);
-	}
-	/* Spot "woken" pkts. receive woken message from device */
-	else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 &&
-			!memcmp(&h5->rx_skb->data[4], woken_pkt, 2)) {
-		BT_ERR("Found a LE woken pkt from device");
-		//      DO Something here
-	}
-	/* Spot "Sleep" pkts*/
-	else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 &&
-			!memcmp(&h5->rx_skb->data[4], sleep_pkt, 2)) {
-		BT_ERR("Found a LE Sleep pkt");
-		//      DO Something here
-	}
-
-}
-
-static inline void h5_unslip_one_byte(struct h5_struct *h5, unsigned char byte)
-{
-	const u8 c0   = 0xc0, db   = 0xdb;
-	const u8 oof1 = 0x11, oof2 = 0x13;
-
-	switch (h5->rx_esc_state) {
-	case H5_ESCSTATE_NOESC:
-		switch (byte) {
-		case 0xdb:
-			h5->rx_esc_state = H5_ESCSTATE_ESC;
-			break;
-		default:
-			memcpy(skb_put(h5->rx_skb, 1), &byte, 1);
-			if ((h5->rx_skb-> data[0] & 0x40) != 0 && 
-					h5->rx_state != H5_W4_CRC)
-				h5_crc_update(&h5->message_crc, byte);
-			h5->rx_count--;
-		}
-		break;
-
-	case H5_ESCSTATE_ESC:
-		switch (byte) {
-		case 0xdc:
-			memcpy(skb_put(h5->rx_skb, 1), &c0, 1);
-			if ((h5->rx_skb-> data[0] & 0x40) != 0 && 
-					h5->rx_state != H5_W4_CRC)
-				h5_crc_update(&h5-> message_crc, 0xc0);
-			h5->rx_esc_state = H5_ESCSTATE_NOESC;
-			h5->rx_count--;
-			break;
-
-		case 0xdd:
-			memcpy(skb_put(h5->rx_skb, 1), &db, 1);
-			if ((h5->rx_skb-> data[0] & 0x40) != 0 && 
-					h5->rx_state != H5_W4_CRC) 
-				h5_crc_update(&h5-> message_crc, 0xdb);
-			h5->rx_esc_state = H5_ESCSTATE_NOESC;
-			h5->rx_count--;
-			break;
-			
-		case 0xde:
-			memcpy(skb_put(h5->rx_skb, 1), &oof1, 1);
-			if ((h5->rx_skb-> data[0] & 0x40) != 0 && h5->rx_state != H5_W4_CRC)
-				h5_crc_update(&h5-> message_crc, oof1);
-			h5->rx_esc_state = H5_ESCSTATE_NOESC;
-			h5->rx_count--;
-			break;
-
-		case 0xdf:
-			memcpy(skb_put(h5->rx_skb, 1), &oof2, 1);
-			if ((h5->rx_skb-> data[0] & 0x40) != 0 && h5->rx_state != H5_W4_CRC) 
-				h5_crc_update(&h5-> message_crc, oof2);
-			h5->rx_esc_state = H5_ESCSTATE_NOESC;
-			h5->rx_count--;
-			break;
-
-		default:
-			BT_ERR ("Invalid byte %02x after esc byte", byte);
-			kfree_skb(h5->rx_skb);
-			h5->rx_skb = NULL;
-			h5->rx_state = H5_W4_PKT_DELIMITER;
-			h5->rx_count = 0;
-		}
-	}
-}
-
-static void h5_complete_rx_pkt(struct hci_uart *hu)
-{
-	struct h5_struct *h5 = hu->priv;
-	int pass_up;
-
-	if (h5->rx_skb->data[0] & 0x80) {	/* reliable pkt */
-		BT_DBG("Received seqno %u from card", h5->rxseq_txack);
-		h5->rxseq_txack++;
-		h5->rxseq_txack %= 0x8;
-		h5->txack_req    = 1;
-
-		/* If needed, transmit an ack pkt */
-		hci_uart_tx_wakeup(hu);
-	}
-
-	h5->rxack = (h5->rx_skb->data[0] >> 3) & 0x07;
-	BT_DBG("Request for pkt %u from card", h5->rxack);
-
-	h5_pkt_cull(h5);
-
-	if ((h5->rx_skb->data[1] & 0x0f) == 2 && 
-			h5->rx_skb->data[0] & 0x80) {
-		bt_cb(h5->rx_skb)->pkt_type = HCI_ACLDATA_PKT;
-		pass_up = 1;
-	} else if ((h5->rx_skb->data[1] & 0x0f) == 4 && 
-			h5->rx_skb->data[0] & 0x80) {
-		bt_cb(h5->rx_skb)->pkt_type = HCI_EVENT_PKT;
-		pass_up = 1;
-	} else if ((h5->rx_skb->data[1] & 0x0f) == 3) {
-		bt_cb(h5->rx_skb)->pkt_type = HCI_SCODATA_PKT;
-		pass_up = 1;
-	} else if ((h5->rx_skb->data[1] & 0x0f) == 15 && 
-			!(h5->rx_skb->data[0] & 0x80)) {
-		//h5_handle_le_pkt(hu);//Link Establishment Pkt
-		pass_up = 0;
-	} else if ((h5->rx_skb->data[1] & 0x0f) == 1 && 
-			h5->rx_skb->data[0] & 0x80) {
-		bt_cb(h5->rx_skb)->pkt_type = HCI_COMMAND_PKT;
-		pass_up = 1;
-	} else if ((h5->rx_skb->data[1] & 0x0f) == 14) {
-		bt_cb(h5->rx_skb)->pkt_type = H5_VDRSPEC_PKT;
-		pass_up = 1;
-	} else
-		pass_up = 0;
-
-	if (!pass_up) {		
-		struct hci_event_hdr hdr;
-		u8 desc = (h5->rx_skb->data[1] & 0x0f);
-
-		if (desc != H5_ACK_PKT && desc != H5_LE_PKT) {
-#if 0			
-			if (hciextn) {
-				desc |= 0xc0;
-				skb_pull(h5->rx_skb, 4);
-				memcpy(skb_push(h5->rx_skb, 1), &desc, 1);
-
-				hdr.evt = 0xff;
-				hdr.plen = h5->rx_skb->len;
-				memcpy(skb_push(h5->rx_skb, HCI_EVENT_HDR_SIZE), &hdr, HCI_EVENT_HDR_SIZE);
-				bt_cb(h5->rx_skb)->pkt_type = HCI_EVENT_PKT;
-
-				hci_recv_frame(h5->rx_skb);
-			} else {
-#endif				
-				BT_ERR ("Packet for unknown channel (%u %s)",
-					h5->rx_skb->data[1] & 0x0f,
-					h5->rx_skb->data[0] & 0x80 ? 
-					"reliable" : "unreliable");
-				kfree_skb(h5->rx_skb);
-//			}
-		} else
-			kfree_skb(h5->rx_skb);
-	} else {
-		/* Pull out H5 hdr */
-		skb_pull(h5->rx_skb, 4);
-
-		hci_recv_frame(h5->rx_skb);
-	}
-
-	h5->rx_state = H5_W4_PKT_DELIMITER;
-	h5->rx_skb = NULL;
-}
-
-static u16 bscp_get_crc(struct h5_struct *h5)
-{
-	return get_unaligned_be16(&h5->rx_skb->data[h5->rx_skb->len - 2]);
-}
-
-/* Recv data */
-static int h5_recv(struct hci_uart *hu, void *data, int count)
-{
-	struct h5_struct *h5 = hu->priv;
-	register unsigned char *ptr;
-
-	BT_DBG("hu %p count %d rx_state %d rx_count %ld", 
-		hu, count, h5->rx_state, h5->rx_count);
-
-	ptr = data;
-	while (count) {
-		if (h5->rx_count) {
-			if (*ptr == 0xc0) {
-				BT_ERR("Short H5 packet");
-				kfree_skb(h5->rx_skb);
-				h5->rx_state = H5_W4_PKT_START;
-				h5->rx_count = 0;
-			} else
-				h5_unslip_one_byte(h5, *ptr);
-
-			ptr++; count--;
-			continue;
-		}
-
-		switch (h5->rx_state) {
-		case H5_W4_HDR:
-			if ((0xff & (u8) ~ (h5->rx_skb->data[0] + h5->rx_skb->data[1] +
-					h5->rx_skb->data[2])) != h5->rx_skb->data[3]) {
-				BT_ERR("Error in H5 hdr checksum");
-				kfree_skb(h5->rx_skb);
-				h5->rx_state = H5_W4_PKT_DELIMITER;
-				h5->rx_count = 0;
-				continue;
-			}
-			if (h5->rx_skb->data[0] & 0x80	/* reliable pkt */
-			    		&& (h5->rx_skb->data[0] & 0x07) != h5->rxseq_txack) {
-				BT_ERR ("Out-of-order packet arrived, got %u expected %u",
-					h5->rx_skb->data[0] & 0x07, h5->rxseq_txack);
-
-				h5->txack_req = 1;
-				hci_uart_tx_wakeup(hu);			
-				kfree_skb(h5->rx_skb);
-				h5->rx_state = H5_W4_PKT_DELIMITER;
-				h5->rx_count = 0;
-				continue;
-			}
-			h5->rx_state = H5_W4_DATA;
-			h5->rx_count = (h5->rx_skb->data[1] >> 4) + 
-					(h5->rx_skb->data[2] << 4);	/* May be 0 */
-			continue;
-
-		case H5_W4_DATA:
-			if (h5->rx_skb->data[0] & 0x40) {	/* pkt with crc */
-				h5->rx_state = H5_W4_CRC;
-				h5->rx_count = 2;
-			} else
-				h5_complete_rx_pkt(hu);
-			continue;
-
-		case H5_W4_CRC:
-			if (bitrev16(h5->message_crc) != bscp_get_crc(h5)) {
-				BT_ERR ("Checksum failed: computed %04x received %04x",
-					bitrev16(h5->message_crc),
-					bscp_get_crc(h5));
-
-				kfree_skb(h5->rx_skb);
-				h5->rx_state = H5_W4_PKT_DELIMITER;
-				h5->rx_count = 0;
-				continue;
-			}
-			skb_trim(h5->rx_skb, h5->rx_skb->len - 2);
-			h5_complete_rx_pkt(hu);
-			continue;
-
-		case H5_W4_PKT_DELIMITER:
-			switch (*ptr) {
-			case 0xc0:
-				h5->rx_state = H5_W4_PKT_START;
-				break;
-			default:
-				/*BT_ERR("Ignoring byte %02x", *ptr);*/
-				break;
-			}
-			ptr++; count--;
-			break;
-
-		case H5_W4_PKT_START:
-			switch (*ptr) {
-			case 0xc0:
-				ptr++; count--;
-				break;
-
-			default:
-				h5->rx_state = H5_W4_HDR;
-				h5->rx_count = 4;
-				h5->rx_esc_state = H5_ESCSTATE_NOESC;
-				H5_CRC_INIT(h5->message_crc);
-
-				/* Do not increment ptr or decrement count
-				 * Allocate packet. Max len of a H5 pkt= 
-				 * 0xFFF (payload) +4 (header) +2 (crc) */
-
-				h5->rx_skb = bt_skb_alloc(0x1005, GFP_ATOMIC);
-				if (!h5->rx_skb) {
-					BT_ERR("Can't allocate mem for new packet");
-					h5->rx_state = H5_W4_PKT_DELIMITER;
-					h5->rx_count = 0;
-					return 0;
-				}
-				h5->rx_skb->dev = (void *) hu->hdev;
-				break;
-			}
-			break;
-		}
-	}
-	return count;
-}
-
-	/* Arrange to retransmit all messages in the relq. */
-static void h5_timed_event(unsigned long arg)
-{
-	struct hci_uart *hu = (struct hci_uart *) arg;
-	struct h5_struct *h5 = hu->priv;
-	struct sk_buff *skb;
-	unsigned long flags;
-
-	BT_DBG("hu %p retransmitting %u pkts", hu, h5->unack.qlen);
-
-	spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING);
-
-	while ((skb = __skb_dequeue_tail(&h5->unack)) != NULL) {
-		h5->msgq_txseq = (h5->msgq_txseq - 1) & 0x07;
-		skb_queue_head(&h5->rel, skb);
-	}
-
-	spin_unlock_irqrestore(&h5->unack.lock, flags);
-
-	hci_uart_tx_wakeup(hu);
-}
-
-static int h5_open(struct hci_uart *hu)
-{
-	struct h5_struct *h5;
-
-	BT_DBG("hu %p", hu);
-
-	h5 = kzalloc(sizeof(*h5), GFP_ATOMIC);
-	if (!h5)
-		return -ENOMEM;
-
-	hu->priv = h5;
-	skb_queue_head_init(&h5->unack);
-	skb_queue_head_init(&h5->rel);
-	skb_queue_head_init(&h5->unrel);
-
-	init_timer(&h5->th5);
-	h5->th5.function = h5_timed_event;
-	h5->th5.data     = (u_long) hu;
-
-	h5->rx_state = H5_W4_PKT_DELIMITER;
-
-	if (txcrc)
-		h5->use_crc = 1;
-
-	return 0;
-}
-
-static int h5_close(struct hci_uart *hu)
-{
-	struct h5_struct *h5 = hu->priv;
-	hu->priv = NULL;
-
-	BT_DBG("hu %p", hu);
-
-	skb_queue_purge(&h5->unack);
-	skb_queue_purge(&h5->rel);
-	skb_queue_purge(&h5->unrel);
-	del_timer(&h5->th5);
-
-	kfree(h5);
-	return 0;
-}
-
-static struct hci_uart_proto h5 = {
-	.id		= HCI_UART_3WIRE,
-	.open		= h5_open,
-	.close		= h5_close,
-	.enqueue	= h5_enqueue,
-	.dequeue	= h5_dequeue,
-	.recv		= h5_recv,
-	.flush		= h5_flush
-};
-
-int h5_init(void)
-{
-	int err = hci_uart_register_proto(&h5);
-
-	if (!err)
-		BT_INFO("HCI Realtek H5 protocol initialized");
-	else
-		BT_ERR("HCI Realtek H5 protocol registration failed");
-
-	return err;
-}
-
-int h5_deinit(void)
-{
-	return hci_uart_unregister_proto(&h5);
-}
-
-#if 0
-module_param(hciextn, bool, 0644);
-MODULE_PARM_DESC(hciextn, "Convert HCI Extensions into H5 packets-3wire test");
-#endif