zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/bluetooth/hci_h4.c b/ap/os/linux/linux-3.4.x/drivers/bluetooth/hci_h4.c
new file mode 100644
index 0000000..7483294
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/bluetooth/hci_h4.c
@@ -0,0 +1,196 @@
+/*
+ *
+ * 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 {
+ 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 = 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);
+
+ kfree_skb(h4->rx_skb);
+
+ 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;
+}
+
+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) {
+ BT_ERR("Data length is too large");
+ kfree_skb(h4->rx_skb);
+ } else {
+ h4->rx_state = H4_W4_DATA;
+ h4->rx_count = len;
+ return len;
+ }
+
+ h4->rx_state = H4_W4_PACKET_TYPE;
+ h4->rx_skb = NULL;
+ h4->rx_count = 0;
+
+ return 0;
+}
+
+/* Recv data */
+static int h4_recv(struct hci_uart *hu, void *data, int count)
+{
+ int ret;
+
+ 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);
+}