add via modify part source code for wm8880 4.4 kitkat

1 files changed, 3151 insertions, 0 deletions

diff --git a/ANDROID_3.4.5/drivers/bluetooth/rtk_btusb.c b/ANDROID_3.4.5/drivers/bluetooth/rtk_btusb.c
new file mode 100755
index 00000000..9037d780
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/bluetooth/rtk_btusb.c
@@ -0,0 +1,3151 @@
+/*
+ *
+ *  Realtek Bluetooth USB driver
+ *
+ *
+ *  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/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+#include <linux/usb.h>
+#include <mach/wmt_misc.h> //added by rubbitxiao
+/*******************************/
+#include "rtk_btusb.h"
+#define VERSION "2.19"
+
+#define DBG_FLAG 0
+#if DBG_FLAG
+#define RTKBT_DBG(fmt, arg...) printk(KERN_INFO "rtk_btusb: " fmt "\n" , ## arg)
+#else
+#define RTKBT_DBG(fmt, arg...)
+#endif
+#define RTKBT_INFO(fmt, arg...) printk(KERN_INFO "rtk_btusb: " fmt "\n" , ## arg)
+#define RTKBT_WARN(fmt, arg...) printk(KERN_WARNING "rtk_btusb: " fmt "\n" , ## arg)
+#define RTKBT_ERR(fmt, arg...) printk(KERN_ERR "rtk_btusb: " fmt "\n" , ## arg)
+
+/*******************************
+**    Reasil patch code
+********************************/
+#define CMD_CMP_EVT		0x0e
+#define PKT_LEN			300
+#define MSG_TO			1000
+#define PATCH_SEG_MAX	252
+#define DATA_END		0x80
+#define DOWNLOAD_OPCODE	0xfc20
+#define BTOFF_OPCODE	0xfc28
+#define TRUE			1
+#define FALSE			0
+#define CMD_HDR_LEN		sizeof(struct hci_command_hdr)
+#define EVT_HDR_LEN		sizeof(struct hci_event_hdr)
+#define CMD_CMP_LEN		sizeof(struct hci_ev_cmd_complete)
+
+enum rtk_endpoit {
+	CTRL_EP = 0,
+	INTR_EP = 1,
+	BULK_EP = 2,
+	ISOC_EP = 3
+};
+
+typedef struct {
+	uint16_t	prod_id;
+	uint16_t	lmp_sub_default;
+	uint16_t	lmp_sub;
+	uint16_t	eversion;
+	char		*mp_patch_name;
+	char		*patch_name;
+	char		*config_name;
+	uint8_t		*fw_cache;
+	int			fw_len;
+} patch_info;
+
+typedef struct {
+	struct usb_interface	*intf;
+	struct usb_device		*udev;
+	patch_info *patch_entry;
+	int			pipe_in, pipe_out;
+	uint8_t		*send_pkt;
+	uint8_t		*rcv_pkt;
+	struct hci_command_hdr		*cmd_hdr;
+	struct hci_event_hdr		*evt_hdr;
+	struct hci_ev_cmd_complete	*cmd_cmp;
+	uint8_t		*req_para,	*rsp_para;
+	uint8_t		*fw_data;
+	int			pkt_len;
+	int			fw_len;
+} firmware_info;
+
+typedef struct {
+	uint8_t index;
+	uint8_t data[PATCH_SEG_MAX];
+} __attribute__((packed)) download_cp;
+
+typedef struct {
+	uint8_t status;
+	uint8_t index;
+} __attribute__((packed)) download_rp;
+
+static patch_info fw_patch_table[] = {
+/* { pid, lmp_sub_default, lmp_sub, everion, mp_fw_name, fw_name, config_name, fw_cache, fw_len } */
+{ 0x1724, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0 }, /* RTL8723A */
+{ 0x8723, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0 }, /* 8723AE */
+{ 0xA723, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0 }, /* 8723AE for LI */
+{ 0x0723, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0 }, /* 8723AE */
+{ 0x3394, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0 }, /* 8723AE for Azurewave*/
+
+{ 0x0724, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0 }, /* 8723AU */
+{ 0x8725, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0 }, /* 8723AU */
+{ 0x872A, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0 }, /* 8723AU */
+{ 0x872B, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0 }, /* 8723AU */
+
+{ 0xb720, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723bu_config", NULL, 0 }, /* RTL8723BU */
+{ 0xb72A, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723bu_config", NULL, 0 }, /* RTL8723BU */
+{ 0xb728, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE for LC */
+{ 0xb723, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE */
+{ 0xb72B, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE */
+{ 0xb001, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE for HP */
+{ 0xb002, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE */
+{ 0xb003, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE */
+{ 0xb004, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE */
+{ 0xb005, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE */
+
+{ 0x3410, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE for Azurewave */
+{ 0x3416, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE for Azurewave */
+{ 0x3459, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE for Azurewave */
+{ 0xE085, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE for Foxconn */
+{ 0xE08B, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0 }, /* RTL8723BE for Foxconn */
+
+{ 0xA761, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au_fw", "rtl8761a_config", NULL, 0 }, /* RTL8761AU only */
+{ 0x818B, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761aw8192eu_fw", "rtl8761aw8192eu_config", NULL, 0 }, /* RTL8761AW + 8192EU */
+{ 0x818C, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761aw8192eu_fw", "rtl8761aw8192eu_config", NULL, 0 }, /* RTL8761AW + 8192EU */
+{ 0x8760, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au8192ee_fw", "rtl8761a_config", NULL, 0 }, /* RTL8761AU + 8192EE */
+{ 0xB761, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au8192ee_fw", "rtl8761a_config", NULL, 0 }, /* RTL8761AU + 8192EE */
+{ 0x8761, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au8192ee_fw", "rtl8761a_config", NULL, 0 }, /* RTL8761AU + 8192EE for LI */
+{ 0x8A60, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au8812ae_fw", "rtl8761a_config", NULL, 0 }, /* RTL8761AU + 8812AE */
+
+{ 0x8821, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0 }, /* RTL8821AE */
+{ 0x0821, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0 }, /* RTL8821AE */
+{ 0x0823, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0 }, /* RTL8821AU */
+{ 0x3414, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0 }, /* RTL8821AE */
+{ 0x3458, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0 }, /* RTL8821AE */
+{ 0x3461, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0 }, /* RTL8821AE */
+{ 0x3462, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0 }, /* RTL8821AE */
+
+/* NOTE: must append patch entries above the null entry */
+{ 0, 0, 0, 0, NULL, NULL, NULL, NULL, 0 }
+};
+
+struct btusb_data {
+	struct hci_dev       *hdev;
+	struct usb_device    *udev;
+	struct usb_interface *intf;
+	struct usb_interface *isoc;
+
+	spinlock_t lock;
+
+	unsigned long flags;
+
+	struct work_struct work;
+	struct work_struct waker;
+
+	struct usb_anchor tx_anchor;
+	struct usb_anchor intr_anchor;
+	struct usb_anchor bulk_anchor;
+	struct usb_anchor isoc_anchor;
+	struct usb_anchor deferred;
+	int tx_in_flight;
+	spinlock_t txlock;
+
+	struct usb_endpoint_descriptor *intr_ep;
+	struct usb_endpoint_descriptor *bulk_tx_ep;
+	struct usb_endpoint_descriptor *bulk_rx_ep;
+	struct usb_endpoint_descriptor *isoc_tx_ep;
+	struct usb_endpoint_descriptor *isoc_rx_ep;
+
+	__u8 cmdreq_type;
+
+	unsigned int sco_num;
+	int isoc_altsetting;
+	int suspend_count;
+//#ifdef CONFIG_HAS_EARLYSUSPEND
+#if 0
+	struct early_suspend early_suspend;
+#else
+	struct notifier_block pm_notifier;
+#endif
+	firmware_info *fw_info;
+};
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 7, 1)
+static bool reset_on_close = 0;
+#endif
+
+static void rtk_free( struct btusb_data *data)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 7, 1)
+	kfree(data);
+#endif
+	return;
+}
+
+static struct btusb_data *rtk_alloc(struct usb_interface *intf)
+{
+	struct btusb_data *data;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 7, 1)
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+#else
+	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
+#endif
+	return data;
+}
+
+static void print_acl(struct sk_buff *skb, int direction)
+{
+#if PRINT_ACL_DATA
+	uint wlength = skb->len;
+	u16 *handle = (u16 *)(skb->data);
+	u16 len = *(handle+1);
+	u8 *acl_data = (u8 *)(skb->data);
+
+	RTK_INFO("%s: direction %d, handle %04x, len %d",
+			__func__, direction, *handle, len);
+#endif
+}
+
+static void print_sco(struct sk_buff *skb, int direction)
+{
+#if PRINT_SCO_DATA
+	uint wlength = skb->len;
+	u16 *handle = (u16 *)(skb->data);
+	u8 len = *(u8 *)(handle+1);
+	u8 *sco_data =(u8 *)(skb->data);
+
+	RTKBT_INFO("%s: direction %d, handle %04x, len %d",
+			__func__, direction, *handle, len);
+#endif
+}
+
+static void print_error_command(struct sk_buff *skb)
+{
+	uint wlength = skb->len;
+	uint icount = 0;
+	u16 *opcode = (u16*)(skb->data);
+	u8 *cmd_data = (u8*)(skb->data);
+	u8 len = *(cmd_data+2);
+
+	switch (*opcode) {
+	case HCI_OP_INQUIRY:
+		printk("HCI_OP_INQUIRY");
+		break;
+	case HCI_OP_INQUIRY_CANCEL:
+		printk("HCI_OP_INQUIRY_CANCEL");
+		break;
+	case HCI_OP_EXIT_PERIODIC_INQ:
+		printk("HCI_OP_EXIT_PERIODIC_INQ");
+		break;
+	case HCI_OP_CREATE_CONN:
+		printk("HCI_OP_CREATE_CONN");
+		break;
+	case HCI_OP_DISCONNECT:
+		printk("HCI_OP_DISCONNECT");
+		break;
+	case HCI_OP_CREATE_CONN_CANCEL:
+		printk("HCI_OP_CREATE_CONN_CANCEL");
+		break;
+	case HCI_OP_ACCEPT_CONN_REQ:
+		printk("HCI_OP_ACCEPT_CONN_REQ");
+		break;
+	case HCI_OP_REJECT_CONN_REQ:
+		printk("HCI_OP_REJECT_CONN_REQ");
+		break;
+	case HCI_OP_AUTH_REQUESTED:
+		printk("HCI_OP_AUTH_REQUESTED");
+		break;
+	case HCI_OP_SET_CONN_ENCRYPT:
+		printk("HCI_OP_SET_CONN_ENCRYPT");
+		break;
+	case HCI_OP_REMOTE_NAME_REQ:
+		printk("HCI_OP_REMOTE_NAME_REQ");
+		break;
+	case HCI_OP_READ_REMOTE_FEATURES:
+		printk("HCI_OP_READ_REMOTE_FEATURES");
+		break;
+	case HCI_OP_SNIFF_MODE:
+		printk("HCI_OP_SNIFF_MODE");
+		break;
+	case HCI_OP_EXIT_SNIFF_MODE:
+		printk("HCI_OP_EXIT_SNIFF_MODE");
+		break;
+	case HCI_OP_SWITCH_ROLE:
+		printk("HCI_OP_SWITCH_ROLE");
+		break;
+	case HCI_OP_SNIFF_SUBRATE:
+		printk("HCI_OP_SNIFF_SUBRATE");
+		break;
+	case HCI_OP_RESET:
+		printk("HCI_OP_RESET");
+		break;
+	default:
+		printk("CMD");
+		break;
+	}
+	printk(":%04x,len:%d,", *opcode,len);
+	for (icount = 3; (icount < wlength) && (icount < 24); icount++)
+		printk("%02x ", *(cmd_data+icount));
+	printk("\n");
+}
+
+static void print_command(struct sk_buff *skb)
+{
+#if PRINT_CMD_EVENT
+	print_error_command(skb);
+#endif
+}
+
+#if CONFIG_BLUEDROID
+/* Global parameters for bt usb char driver */
+#define BT_CHAR_DEVICE_NAME "rtk_btusb"
+struct mutex btchr_mutex;
+static struct sk_buff_head btchr_readq;
+static wait_queue_head_t btchr_read_wait;
+static int bt_char_dev_registered;
+static dev_t bt_devid; /* bt char device number */
+static struct cdev bt_char_dev; /* bt character device structure */
+static struct class *bt_char_class; /* device class for usb char driver */
+static int bt_reset = 0;
+/* HCI device & lock */
+DEFINE_RWLOCK(hci_dev_lock);
+struct hci_dev *ghdev = NULL;
+
+static void print_event(struct sk_buff *skb)
+{
+#if PRINT_CMD_EVENT
+	uint wlength = skb->len;
+	uint icount = 0;
+	u8 *opcode = (u8*)(skb->data);
+	u8 len = *(opcode+1);
+
+	switch (*opcode) {
+	case HCI_EV_INQUIRY_COMPLETE:
+		printk("HCI_EV_INQUIRY_COMPLETE");
+		break;
+	case HCI_EV_INQUIRY_RESULT:
+		printk("HCI_EV_INQUIRY_RESULT");
+		break;
+	case HCI_EV_CONN_COMPLETE:
+		printk("HCI_EV_CONN_COMPLETE");
+		break;
+	case HCI_EV_CONN_REQUEST:
+		printk("HCI_EV_CONN_REQUEST");
+		break;
+	case HCI_EV_DISCONN_COMPLETE:
+		printk("HCI_EV_DISCONN_COMPLETE");
+		break;
+	case HCI_EV_AUTH_COMPLETE:
+		printk("HCI_EV_AUTH_COMPLETE");
+		break;
+	case HCI_EV_REMOTE_NAME:
+		printk("HCI_EV_REMOTE_NAME");
+		break;
+	case HCI_EV_ENCRYPT_CHANGE:
+		printk("HCI_EV_ENCRYPT_CHANGE");
+		break;
+	case HCI_EV_CHANGE_LINK_KEY_COMPLETE:
+		printk("HCI_EV_CHANGE_LINK_KEY_COMPLETE");
+		break;
+	case HCI_EV_REMOTE_FEATURES:
+		printk("HCI_EV_REMOTE_FEATURES");
+		break;
+	case HCI_EV_REMOTE_VERSION:
+		printk("HCI_EV_REMOTE_VERSION");
+		break;
+	case HCI_EV_QOS_SETUP_COMPLETE:
+		printk("HCI_EV_QOS_SETUP_COMPLETE");
+		break;
+	case HCI_EV_CMD_COMPLETE:
+		printk("HCI_EV_CMD_COMPLETE");
+		break;
+	case HCI_EV_CMD_STATUS:
+		printk("HCI_EV_CMD_STATUS");
+		break;
+	case HCI_EV_ROLE_CHANGE:
+		printk("HCI_EV_ROLE_CHANGE");
+		break;
+	case HCI_EV_NUM_COMP_PKTS:
+		printk("HCI_EV_NUM_COMP_PKTS");
+		break;
+	case HCI_EV_MODE_CHANGE:
+		printk("HCI_EV_MODE_CHANGE");
+		break;
+	case HCI_EV_PIN_CODE_REQ:
+		printk("HCI_EV_PIN_CODE_REQ");
+		break;
+	case HCI_EV_LINK_KEY_REQ:
+		printk("HCI_EV_LINK_KEY_REQ");
+		break;
+	case HCI_EV_LINK_KEY_NOTIFY:
+		printk("HCI_EV_LINK_KEY_NOTIFY");
+		break;
+	case HCI_EV_CLOCK_OFFSET:
+		printk("HCI_EV_CLOCK_OFFSET");
+		break;
+	case HCI_EV_PKT_TYPE_CHANGE:
+		printk("HCI_EV_PKT_TYPE_CHANGE");
+		break;
+	case HCI_EV_PSCAN_REP_MODE:
+		printk("HCI_EV_PSCAN_REP_MODE");
+		break;
+	case HCI_EV_INQUIRY_RESULT_WITH_RSSI:
+		printk("HCI_EV_INQUIRY_RESULT_WITH_RSSI");
+		break;
+	case HCI_EV_REMOTE_EXT_FEATURES:
+		printk("HCI_EV_REMOTE_EXT_FEATURES");
+		break;
+	case HCI_EV_SYNC_CONN_COMPLETE:
+		printk("HCI_EV_SYNC_CONN_COMPLETE");
+		break;
+	case HCI_EV_SYNC_CONN_CHANGED:
+		printk("HCI_EV_SYNC_CONN_CHANGED");
+		break;
+	case HCI_EV_SNIFF_SUBRATE:
+		printk("HCI_EV_SNIFF_SUBRATE");
+		break;
+	case HCI_EV_EXTENDED_INQUIRY_RESULT:
+		printk("HCI_EV_EXTENDED_INQUIRY_RESULT");
+		break;
+	case HCI_EV_IO_CAPA_REQUEST:
+		printk("HCI_EV_IO_CAPA_REQUEST");
+		break;
+	case HCI_EV_SIMPLE_PAIR_COMPLETE:
+		printk("HCI_EV_SIMPLE_PAIR_COMPLETE");
+		break;
+	case HCI_EV_REMOTE_HOST_FEATURES:
+		printk("HCI_EV_REMOTE_HOST_FEATURES");
+		break;
+	default:
+		printk("event");
+		break;
+	}
+	printk(":%02x,len:%d,", *opcode,len);
+	for (icount = 2; (icount < wlength) && (icount < 24); icount++)
+		printk("%02x ", *(opcode+icount));
+	printk("\n");
+#endif
+}
+
+static inline ssize_t usb_put_user(struct sk_buff *skb,
+		char __user *buf, int count)
+{
+	char __user *ptr = buf;
+	int len = min_t(unsigned int, skb->len, count);
+
+	if (copy_to_user(ptr, skb->data, len))
+		return -EFAULT;
+
+	return len;
+}
+
+static struct sk_buff *rtk_skb_queue[QUEUE_SIZE];
+static int rtk_skb_queue_front = -1;
+static int rtk_skb_queue_rear = -1;
+
+static void rtk_enqueue(struct sk_buff *skb)
+{
+	if (rtk_skb_queue_front == (rtk_skb_queue_rear + 1) % QUEUE_SIZE) {
+		/*
+		 * If queue is full, current solution is to drop
+		 * the following entries.
+		 */
+		RTKBT_WARN("%s: Queue is full, entry will be dropped", __func__);
+	} else {
+		if (rtk_skb_queue_front == -1) {
+			rtk_skb_queue_front = 0;
+			rtk_skb_queue_rear = 0;
+		} else {
+			rtk_skb_queue_rear++;
+			rtk_skb_queue_rear %= QUEUE_SIZE;
+		}
+
+		rtk_skb_queue[rtk_skb_queue_rear] = skb;
+	}
+}
+
+static struct sk_buff *rtk_dequeue_try(unsigned int deq_len)
+{
+	struct sk_buff *skb;
+	struct sk_buff *skb_copy;
+
+	if (rtk_skb_queue_front == -1) {
+		RTKBT_WARN("%s: Queue is empty", __func__);
+		return NULL;
+	}
+
+	skb = rtk_skb_queue[rtk_skb_queue_front];
+	if (deq_len >= skb->len) {
+		if (rtk_skb_queue_front == rtk_skb_queue_rear) {
+			rtk_skb_queue_front = -1;
+			rtk_skb_queue_rear = -1;
+		} else {
+			rtk_skb_queue_front++;
+			rtk_skb_queue_front %= QUEUE_SIZE;
+		}
+		/*
+		 * Return skb addr to be dequeued, and the caller
+		 * should free the skb eventually.
+		 */
+		return skb;
+	} else {
+		skb_copy = pskb_copy(skb, GFP_ATOMIC);
+		skb_pull(skb, deq_len);
+		/* Return its copy to be freed */
+		return skb_copy;
+	}
+}
+
+static inline int is_queue_empty(void)
+{
+	return (rtk_skb_queue_front == -1) ? 1 : 0;
+}
+
+/*
+ * Realtek - Integrate from hci_core.c
+ */
+
+/* Get HCI device by index.
+ * Device is held on return. */
+static struct hci_dev *hci_dev_get(int index)
+{
+	if (index != 0)
+		return NULL;
+
+	return ghdev;
+}
+
+/* ---- HCI ioctl helpers ---- */
+static int hci_dev_open(__u16 dev)
+{
+	struct hci_dev *hdev;
+	int ret = 0;
+
+	RTKBT_DBG("%s: dev %d", __func__, dev);
+
+	hdev = hci_dev_get(dev);
+	if (!hdev) {
+		RTKBT_ERR("%s: Failed to get hci dev[Null]", __func__);
+		return -ENODEV;
+	}
+
+	if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
+		ret = -ENODEV;
+		goto done;
+	}
+
+	if (test_bit(HCI_UP, &hdev->flags)) {
+		ret = -EALREADY;
+		goto done;
+	}
+
+	if (hdev->open(hdev)) {
+		ret = -EIO;
+		goto done;
+	}
+
+	set_bit(HCI_UP, &hdev->flags);
+done:
+	return ret;
+}
+
+static int hci_dev_do_close(struct hci_dev *hdev)
+{
+	if (hdev->flush)
+		hdev->flush(hdev);
+	/* After this point our queues are empty
+	 * and no tasks are scheduled. */
+	hdev->close(hdev);
+	/* Clear flags */
+	hdev->flags = 0;
+	return 0;
+}
+
+static int hci_dev_close(__u16 dev)
+{
+	struct hci_dev *hdev;
+	int err;
+	hdev = hci_dev_get(dev);
+	if (!hdev) {
+		RTKBT_ERR("%s: failed to get hci dev[Null]", __func__);
+		return -ENODEV;
+	}
+
+	err = hci_dev_do_close(hdev);
+
+	return err;
+}
+
+static struct hci_dev *hci_alloc_dev(void)
+{
+	struct hci_dev *hdev;
+
+	hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
+	if (!hdev)
+		return NULL;
+
+	return hdev;
+}
+
+/* Free HCI device */
+static void hci_free_dev(struct hci_dev *hdev)
+{
+	kfree(hdev);
+}
+
+/* Register HCI device */
+static int hci_register_dev(struct hci_dev *hdev)
+{
+	int i, id;
+
+	RTKBT_DBG("%s: %p name %s bus %d", __func__, hdev, hdev->name, hdev->bus);
+	/* Do not allow HCI_AMP devices to register at index 0,
+	 * so the index can be used as the AMP controller ID.
+	 */
+	id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
+
+	write_lock(&hci_dev_lock);
+
+	sprintf(hdev->name, "hci%d", id);
+	hdev->id = id;
+	hdev->flags = 0;
+	hdev->dev_flags = 0;
+	mutex_init(&hdev->lock);
+
+	RTKBT_DBG("%s: id %d, name %s", __func__, hdev->id, hdev->name);
+
+
+	for (i = 0; i < NUM_REASSEMBLY; i++)
+		hdev->reassembly[i] = NULL;
+
+	memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
+	atomic_set(&hdev->promisc, 0);
+
+	if (ghdev) {
+		RTKBT_ERR("%s: Hci device has been registered already", __func__);
+		return -1;
+	} else
+		ghdev = hdev;
+
+	write_unlock(&hci_dev_lock);
+
+	return id;
+}
+
+/* Unregister HCI device */
+static void hci_unregister_dev(struct hci_dev *hdev)
+{
+	int i;
+
+	RTKBT_DBG("%s: hdev %p name %s bus %d", __func__, hdev, hdev->name, hdev->bus);
+	set_bit(HCI_UNREGISTER, &hdev->dev_flags);
+
+	write_lock(&hci_dev_lock);
+	ghdev = NULL;
+	write_unlock(&hci_dev_lock);
+
+	hci_dev_do_close(hdev);
+	for (i = 0; i < NUM_REASSEMBLY; i++)
+		kfree_skb(hdev->reassembly[i]);
+}
+
+static void hci_send_to_stack(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct sk_buff *rtk_skb_copy = NULL;
+
+	RTKBT_DBG("%s", __func__);
+
+	if (!hdev) {
+		RTKBT_ERR("%s: Frame for unknown HCI device", __func__);
+		return;
+	}
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
+		RTKBT_ERR("%s: HCI not running", __func__);
+		return;
+	}
+
+	rtk_skb_copy = pskb_copy(skb, GFP_ATOMIC);
+	if (!rtk_skb_copy) {
+		RTKBT_ERR("%s: Copy skb error", __func__);
+		return;
+	}
+
+	memcpy(skb_push(rtk_skb_copy, 1), &bt_cb(skb)->pkt_type, 1);
+	rtk_enqueue(rtk_skb_copy);
+
+	/* Make sure bt char device existing before wakeup read queue */
+	hdev = hci_dev_get(0);
+	if (hdev) {
+		RTKBT_DBG("%s: Try to wakeup read queue", __func__);
+		wake_up_interruptible(&btchr_read_wait);
+	}
+
+	return;
+}
+
+/* Receive frame from HCI drivers */
+static int hci_recv_frame(struct sk_buff *skb)
+{
+	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
+
+	if (!hdev ||
+		(!test_bit(HCI_UP, &hdev->flags) && !test_bit(HCI_INIT, &hdev->flags))) {
+		kfree_skb(skb);
+		return -ENXIO;
+	}
+
+	/* Incomming skb */
+	bt_cb(skb)->incoming = 1;
+
+	/* Time stamp */
+	__net_timestamp(skb);
+
+	if (atomic_read(&hdev->promisc)) {
+		/* Send copy to the sockets */
+		hci_send_to_stack(hdev, skb);
+	}
+	kfree_skb(skb);
+	return 0;
+}
+
+static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
+						  int count, __u8 index)
+{
+	int len = 0;
+	int hlen = 0;
+	int remain = count;
+	struct sk_buff *skb;
+	struct bt_skb_cb *scb;
+
+	RTKBT_DBG("%s", __func__);
+
+	if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
+			index >= NUM_REASSEMBLY)
+		return -EILSEQ;
+
+	skb = hdev->reassembly[index];
+
+	if (!skb) {
+		switch (type) {
+		case HCI_ACLDATA_PKT:
+			len = HCI_MAX_FRAME_SIZE;
+			hlen = HCI_ACL_HDR_SIZE;
+			break;
+		case HCI_EVENT_PKT:
+			len = HCI_MAX_EVENT_SIZE;
+			hlen = HCI_EVENT_HDR_SIZE;
+			break;
+		case HCI_SCODATA_PKT:
+			len = HCI_MAX_SCO_SIZE;
+			hlen = HCI_SCO_HDR_SIZE;
+			break;
+		}
+
+		skb = bt_skb_alloc(len, GFP_ATOMIC);
+		if (!skb)
+			return -ENOMEM;
+
+		scb = (void *) skb->cb;
+		scb->expect = hlen;
+		scb->pkt_type = type;
+
+		skb->dev = (void *) hdev;
+		hdev->reassembly[index] = skb;
+	}
+
+	while (count) {
+		scb = (void *) skb->cb;
+		len = min_t(uint, scb->expect, count);
+
+		memcpy(skb_put(skb, len), data, len);
+
+		count -= len;
+		data += len;
+		scb->expect -= len;
+		remain = count;
+
+		switch (type) {
+		case HCI_EVENT_PKT:
+			if (skb->len == HCI_EVENT_HDR_SIZE) {
+				struct hci_event_hdr *h = hci_event_hdr(skb);
+				scb->expect = h->plen;
+
+				if (skb_tailroom(skb) < scb->expect) {
+					kfree_skb(skb);
+					hdev->reassembly[index] = NULL;
+					return -ENOMEM;
+				}
+			}
+			break;
+
+		case HCI_ACLDATA_PKT:
+			if (skb->len  == HCI_ACL_HDR_SIZE) {
+				struct hci_acl_hdr *h = hci_acl_hdr(skb);
+				scb->expect = __le16_to_cpu(h->dlen);
+
+				if (skb_tailroom(skb) < scb->expect) {
+					kfree_skb(skb);
+					hdev->reassembly[index] = NULL;
+					return -ENOMEM;
+				}
+			}
+			break;
+
+		case HCI_SCODATA_PKT:
+			if (skb->len == HCI_SCO_HDR_SIZE) {
+				struct hci_sco_hdr *h = hci_sco_hdr(skb);
+				scb->expect = h->dlen;
+
+				if (skb_tailroom(skb) < scb->expect) {
+					kfree_skb(skb);
+					hdev->reassembly[index] = NULL;
+					return -ENOMEM;
+				}
+			}
+			break;
+		}
+
+		if (scb->expect == 0) {
+			/* Complete frame */
+			if(HCI_ACLDATA_PKT == type)
+				print_acl(skb,0);
+			if(HCI_SCODATA_PKT == type)
+				print_sco(skb,0);
+			if(HCI_EVENT_PKT == type)
+				print_event(skb);
+
+			bt_cb(skb)->pkt_type = type;
+			hci_recv_frame(skb);
+
+			hdev->reassembly[index] = NULL;
+			return remain;
+		}
+	}
+
+	return remain;
+}
+
+static int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
+{
+	int rem = 0;
+
+	if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
+		return -EILSEQ;
+
+	while (count) {
+		rem = hci_reassembly(hdev, type, data, count, type - 1);
+		if (rem < 0)
+			return rem;
+
+		data += (count - rem);
+		count = rem;
+	}
+
+	return rem;
+}
+
+void hci_hardware_error(void)
+{
+	struct sk_buff *rtk_skb_copy = NULL;
+	int len = 3;
+	uint8_t hardware_err_pkt[3] = {HCI_EVENT_PKT, 0x10, 0x00};
+
+	rtk_skb_copy = alloc_skb(len, GFP_ATOMIC);
+	if (!rtk_skb_copy) {
+		RTKBT_ERR("%s: Failed to allocate mem", __func__);
+		return;
+	}
+
+	memcpy(skb_put(rtk_skb_copy, len), hardware_err_pkt, len);
+	rtk_enqueue(rtk_skb_copy);
+
+	wake_up_interruptible(&btchr_read_wait);
+}
+
+static int btchr_open(struct inode *inode_p, struct file  *file_p)
+{
+	struct btusb_data *data;
+	struct hci_dev *hdev;
+
+	RTKBT_INFO("%s: BT usb char device is opening", __func__);
+	/* Not open unless wanna tracing log */
+	/* trace_printk("%s: open....\n", __func__); */
+
+	hdev = hci_dev_get(0);
+	if (!hdev) {
+		RTKBT_ERR("%s: Failed to get hci dev[NULL]", __func__);
+		return -1;
+	}
+	data = GET_DRV_DATA(hdev);
+
+	atomic_inc(&hdev->promisc);
+	/*
+	 * As bt device is not re-opened when hotplugged out, we cannot
+	 * trust on file's private data(may be null) when other file ops
+	 * are invoked.
+	 */
+	file_p->private_data = data;
+
+	mutex_lock(&btchr_mutex);
+	hci_dev_open(0);
+	mutex_unlock(&btchr_mutex);
+
+	return nonseekable_open(inode_p, file_p);
+}
+
+static int btchr_close(struct inode  *inode_p, struct file   *file_p)
+{
+	struct btusb_data *data;
+	struct hci_dev *hdev;
+
+	RTKBT_INFO("%s: BT usb char device is closing", __func__);
+	/* Not open unless wanna tracing log */
+	/* trace_printk("%s: close....\n", __func__); */
+
+	data = file_p->private_data;
+	file_p->private_data = NULL;
+
+#if CONFIG_BLUEDROID
+	/*
+	 * If the upper layer closes bt char interfaces, no reset
+	 * action required even bt device hotplugged out.
+	 */
+	bt_reset = 0;
+#endif
+
+	hdev = hci_dev_get(0);
+	if (hdev) {
+		atomic_set(&hdev->promisc, 0);
+		mutex_lock(&btchr_mutex);
+		hci_dev_close(0);
+		mutex_unlock(&btchr_mutex);
+	}
+
+	return 0;
+}
+
+static ssize_t btchr_read(struct file *file_p,
+		char __user *buf_p,
+		size_t count,
+		loff_t *pos_p)
+{
+	struct hci_dev *hdev;
+	struct sk_buff *skb;
+	ssize_t ret = 0;
+
+	RTKBT_DBG("%s: BT usb char device is reading", __func__);
+
+	while (count) {
+		hdev = hci_dev_get(0);
+		if (!hdev) {
+			/*
+			 * Note: Only when BT device hotplugged out, we wil get
+			 * into such situation. In order to keep the upper layer
+			 * stack alive (blocking the read), we should never return
+			 * EFAULT or break the loop.
+			 */
+			RTKBT_ERR("%s: Failed to get hci dev[Null]", __func__);
+		}
+
+		ret = wait_event_interruptible(btchr_read_wait, !is_queue_empty());
+		if (ret < 0) {
+			RTKBT_ERR("%s: wait event is signaled %d", __func__, ret);
+			break;
+		}
+
+		skb = rtk_dequeue_try(count);
+		if (skb) {
+			ret = usb_put_user(skb, buf_p, count);
+			if (ret < 0)
+				RTKBT_ERR("%s: Failed to put data to user space", __func__);
+			kfree_skb(skb);
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static ssize_t btchr_write(struct file *file_p,
+		const char __user *buf_p,
+		size_t count,
+		loff_t *pos_p)
+{
+	struct btusb_data *data = file_p->private_data;
+	struct hci_dev *hdev;
+	struct sk_buff *skb;
+
+	RTKBT_DBG("%s: BT usb char device is writing", __func__);
+
+	hdev = hci_dev_get(0);
+	if (!hdev) {
+		RTKBT_WARN("%s: Failed to get hci dev[Null]", __func__);
+		/*
+		 * Note: we bypass the data from the upper layer if bt device
+		 * is hotplugged out. Fortunatelly, H4 or H5 HCI stack does
+		 * NOT check btchr_write's return value. However, returning
+		 * count instead of EFAULT is preferable.
+		 */
+		/* return -EFAULT; */
+		return count;
+	}
+
+	/* Never trust on btusb_data, as bt device may be hotplugged out */
+	data = GET_DRV_DATA(hdev);
+	if (!data) {
+		RTKBT_WARN("%s: Failed to get bt usb driver data[Null]", __func__);
+		return count;
+	}
+
+	if (count > HCI_MAX_FRAME_SIZE)
+		return -EINVAL;
+
+	skb = bt_skb_alloc(count, GFP_ATOMIC);
+	if (!skb)
+		return -ENOMEM;
+	skb_reserve(skb, -1); // Add this line
+
+	if (copy_from_user(skb_put(skb, count), buf_p, count)) {
+		RTKBT_ERR("%s: Failed to get data from user space", __func__);
+		kfree_skb(skb);
+		return -EFAULT;
+	}
+
+	skb->dev = (void *)hdev;
+	bt_cb(skb)->pkt_type = *((__u8 *)skb->data);
+	skb_pull(skb, 1);
+	data->hdev->send(skb);
+
+	return count;
+}
+
+static unsigned int btchr_poll(struct file *file_p, poll_table *wait)
+{
+	struct btusb_data *data = file_p->private_data;
+	struct hci_dev *hdev;
+
+	RTKBT_DBG("%s: BT usb char device is polling", __func__);
+
+	hdev = hci_dev_get(0);
+	if (!hdev) {
+		RTKBT_ERR("%s: Failed to get hci dev[Null]", __func__);
+		mdelay(URB_CANCELING_DELAY_MS);
+		return POLLOUT | POLLWRNORM;
+	}
+
+	/* Never trust on btusb_data, as bt device may be hotplugged out */
+	data = GET_DRV_DATA(hdev);
+	if (!data) {
+		/*
+		 * When bt device is hotplugged out, btusb_data will
+		 * be freed in disconnect.
+		 */
+		RTKBT_ERR("%s: Failed to get bt usb driver data[Null]", __func__);
+		mdelay(URB_CANCELING_DELAY_MS);
+		return POLLOUT | POLLWRNORM;
+	}
+
+	if (!is_queue_empty())
+		return POLLIN | POLLRDNORM;
+
+	poll_wait(file_p, &btchr_read_wait, wait);
+
+	return POLLOUT | POLLWRNORM;
+}
+
+static struct file_operations bt_chrdev_ops  = {
+	open	:	btchr_open,
+	release	:	btchr_close,
+	read	:	btchr_read,
+	write	:	btchr_write,
+	poll	:	btchr_poll
+};
+
+static int btchr_init(void)
+{
+	int res = 0;
+	struct device *dev;
+
+	RTKBT_INFO("Register usb char device interface for BT driver");
+	/*
+	 * btchr mutex is used to sync between
+	 * 1) downloading patch and opening bt char driver
+	 * 2) the file operations of bt char driver
+	 */
+	mutex_init(&btchr_mutex);
+
+	skb_queue_head_init(&btchr_readq);
+	init_waitqueue_head(&btchr_read_wait);
+
+	bt_char_class = class_create(THIS_MODULE, BT_CHAR_DEVICE_NAME);
+	if (IS_ERR(bt_char_class)) {
+		RTKBT_ERR("Failed to create bt char class");
+		return PTR_ERR(bt_char_class);
+	}
+
+	res = alloc_chrdev_region(&bt_devid, 0, 1, BT_CHAR_DEVICE_NAME);
+	if (res < 0) {
+		RTKBT_ERR("Failed to allocate bt char device");
+		goto err_alloc;
+	}
+
+	dev = device_create(bt_char_class, NULL, bt_devid, NULL, BT_CHAR_DEVICE_NAME);
+	if (IS_ERR(dev)) {
+		RTKBT_ERR("Failed to create bt char device");
+		res = PTR_ERR(dev);
+		goto err_create;
+	}
+
+	cdev_init(&bt_char_dev, &bt_chrdev_ops);
+	res = cdev_add(&bt_char_dev, bt_devid, 1);
+	if (res < 0) {
+		RTKBT_ERR("Failed to add bt char device");
+		goto err_add;
+	}
+
+	return 0;
+
+err_add:
+	device_destroy(bt_char_class, bt_devid);
+err_create:
+	unregister_chrdev_region(bt_devid, 1);
+err_alloc:
+	class_destroy(bt_char_class);
+	return res;
+}
+
+static void btchr_exit(void)
+{
+	RTKBT_INFO("Unregister usb char device interface for BT driver");
+
+	device_destroy(bt_char_class, bt_devid);
+	cdev_del(&bt_char_dev);
+	unregister_chrdev_region(bt_devid, 1);
+	class_destroy(bt_char_class);
+
+	return;
+}
+#endif
+
+int send_hci_cmd(firmware_info *fw_info)
+{
+	int ret_val;
+
+	ret_val = usb_control_msg(
+		fw_info->udev, fw_info->pipe_out,
+		0, USB_TYPE_CLASS, 0, 0,
+		(void *)(fw_info->send_pkt),
+		fw_info->pkt_len, MSG_TO);
+
+	return ret_val;
+}
+
+int rcv_hci_evt(firmware_info *fw_info)
+{
+	int ret_len = 0, ret_val = 0;
+	int i;
+
+	while (1) {
+		for(i = 0; i < 5; i++) {
+		ret_val = usb_interrupt_msg(
+			fw_info->udev, fw_info->pipe_in,
+			(void *)(fw_info->rcv_pkt), PKT_LEN,
+			&ret_len, MSG_TO);
+			if (ret_val >= 0)
+				break;
+		}
+
+		if (ret_val < 0)
+			return ret_val;
+
+		if (CMD_CMP_EVT == fw_info->evt_hdr->evt) {
+			if (fw_info->cmd_hdr->opcode == fw_info->cmd_cmp->opcode)
+				return ret_len;
+		}
+	}
+}
+
+int set_bt_onoff(firmware_info *fw_info, uint8_t onoff)
+{
+	patch_info *patch_entry;
+	int ret_val;
+
+	RTKBT_INFO("%s: %s", __func__, onoff != 0 ? "on" : "off");
+
+	patch_entry = fw_info->patch_entry;
+	if (!patch_entry)
+		return -1;
+
+	fw_info->cmd_hdr->opcode = cpu_to_le16(BTOFF_OPCODE);
+	fw_info->cmd_hdr->plen = 1;
+	fw_info->pkt_len = CMD_HDR_LEN + 1;
+	fw_info->send_pkt[CMD_HDR_LEN] = onoff;
+
+	ret_val = send_hci_cmd(fw_info);
+	if (ret_val < 0) {
+		RTKBT_ERR("%s: Failed to send bt %s cmd, errno %d",
+				__func__, onoff != 0 ? "on" : "off", ret_val);
+		return ret_val;
+	}
+
+	ret_val = rcv_hci_evt(fw_info);
+	if (ret_val < 0) {
+		RTKBT_ERR("%s: Failed to receive bt %s event, errno %d",
+				__func__, onoff != 0 ? "on" : "off", ret_val);
+		return ret_val;
+	}
+
+	return ret_val;
+}
+
+static patch_info *get_fw_table_entry(struct usb_device* udev)
+{
+	patch_info *patch_entry = fw_patch_table;
+	uint16_t pid = le16_to_cpu(udev->descriptor.idProduct);
+	uint32_t entry_size = sizeof(fw_patch_table) / sizeof(fw_patch_table[0]);
+	uint32_t i;
+
+	RTKBT_INFO("%s: Product id = 0x%04x, fw table entry size %d", __func__, pid, entry_size);
+
+	for (i = 0; i < entry_size; i++, patch_entry++) {
+		if (pid == patch_entry->prod_id)
+			break;
+	}
+
+	if (i == entry_size) {
+		RTKBT_ERR("%s: No fw table entry found", __func__);
+		return NULL;
+	}
+
+	return patch_entry;
+}
+
+static struct rtk_epatch_entry *get_fw_patch_entry(struct rtk_epatch *epatch_info, uint16_t eco_ver)
+{
+	int patch_num = epatch_info->number_of_total_patch;
+	uint8_t *epatch_buf = (uint8_t *)epatch_info;
+	struct rtk_epatch_entry *p_entry = NULL;
+	int coex_date;
+	int coex_ver;
+	int i;
+
+	for (i = 0; i < patch_num; i++) {
+		if (*(uint16_t *)(epatch_buf + 14 + 2*i) == eco_ver + 1) {
+			p_entry = kzalloc(sizeof(*p_entry), GFP_KERNEL);
+			if (!p_entry) {
+				RTKBT_ERR("%s: Failed to allocate mem for patch entry", __func__);
+				return NULL;
+			}
+			p_entry->chip_id = eco_ver + 1;
+			p_entry->patch_length = *(uint16_t*)(epatch_buf + 14 + 2*patch_num + 2*i);
+			p_entry->start_offset = *(uint32_t*)(epatch_buf + 14 + 4*patch_num + 4*i);
+			p_entry->coex_version = *(uint32_t*)(epatch_buf + p_entry->start_offset + p_entry->patch_length - 12);
+			p_entry->svn_version = *(uint32_t*)(epatch_buf + p_entry->start_offset + p_entry->patch_length - 8);
+			p_entry->fw_version = *(uint32_t*)(epatch_buf + p_entry->start_offset + p_entry->patch_length - 4);
+
+			coex_date = ((p_entry->coex_version >> 16) & 0x7ff) + ((p_entry->coex_version >> 27) * 10000);
+			coex_ver = p_entry->coex_version & 0xffff;
+
+			RTKBT_INFO("%s: chip id %d, patch length 0x%04x, patch offset 0x%08x, "
+					"coex version 20%06d-0x%04x, svn version 0x%08x, fw version 0x%08x",
+					__func__, p_entry->chip_id, p_entry->patch_length, p_entry->start_offset,
+					coex_date, coex_ver, p_entry->svn_version, p_entry->fw_version);
+			break;
+		}
+	}
+
+	return p_entry;
+}
+
+/*
+ * check the return value
+ * 1: need to download fw patch
+ * 0: no need to download fw patch
+ * <0: failed to check lmp version
+ */
+int check_fw_version(firmware_info* fw_info)
+{
+	struct hci_rp_read_local_version *read_ver_rsp;
+	patch_info *patch_entry = NULL;
+	int ret_val = -1;
+
+	fw_info->cmd_hdr->opcode = cpu_to_le16(HCI_OP_READ_LOCAL_VERSION);
+	fw_info->cmd_hdr->plen = 0;
+	fw_info->pkt_len = CMD_HDR_LEN;
+
+	ret_val = send_hci_cmd(fw_info);
+	if (ret_val < 0) {
+		RTKBT_ERR("%s: Failed to send hci cmd 0x%04x, errno %d",
+				__func__, fw_info->cmd_hdr->opcode, ret_val);
+		return ret_val;
+	}
+
+	ret_val = rcv_hci_evt(fw_info);
+	if (ret_val < 0) {
+		RTKBT_ERR("%s: Failed to receive hci event, errno %d",
+				__func__, ret_val);
+		return ret_val;
+	}
+
+	patch_entry = fw_info->patch_entry;
+	read_ver_rsp = (struct hci_rp_read_local_version *)(fw_info->rsp_para);
+
+	RTKBT_INFO("%s: Controller lmp = 0x%04x, patch lmp = 0x%04x, default patch lmp = 0x%04x",
+			__func__, read_ver_rsp->lmp_subver, patch_entry->lmp_sub, patch_entry->lmp_sub_default);
+
+	if (read_ver_rsp->lmp_subver == patch_entry->lmp_sub_default) {
+		RTKBT_INFO("%s: Cold BT controller startup", __func__);
+		return 1;
+	} else if (read_ver_rsp->lmp_subver != patch_entry->lmp_sub) {
+		RTKBT_INFO("%s: Warm BT controller startup with updated lmp", __func__);
+		return 1;
+	} else {
+		RTKBT_INFO("%s: Warm BT controller startup with same lmp", __func__);
+		return 0;
+	}
+}
+
+int get_eversion(firmware_info* fw_info)
+{
+	struct rtk_eversion_evt *ever_evt;
+	int ret_val;
+
+	if (!fw_info)
+		return -ENODEV;
+
+	fw_info->cmd_hdr->opcode = cpu_to_le16(HCI_VENDOR_READ_RTK_ROM_VERISION);
+	fw_info->cmd_hdr->plen = 0;
+	fw_info->pkt_len = CMD_HDR_LEN;
+
+	ret_val = send_hci_cmd(fw_info);
+	if (ret_val < 0) {
+		RTKBT_ERR("%s: Failed to send hci cmd 0x%04x, errno %d",
+				__func__, fw_info->cmd_hdr->opcode, ret_val);
+		return ret_val;
+	}
+
+	ret_val = rcv_hci_evt(fw_info);
+	if (ret_val < 0) {
+		RTKBT_ERR("%s: Failed to receive hci event, errno %d",
+				__func__, ret_val);
+		return ret_val;
+	}
+
+	ever_evt = (struct rtk_eversion_evt *)(fw_info->rsp_para);
+
+	RTKBT_INFO("%s: status %d, eversion %d", __func__, ever_evt->status, ever_evt->version);
+
+	if (ever_evt->status)
+		fw_info->patch_entry->eversion = 0;
+	else
+		fw_info->patch_entry->eversion = ever_evt->version;
+
+	return ret_val;
+}
+
+int load_firmware(firmware_info *fw_info, uint8_t **buff)
+{
+	const struct firmware *fw, *cfg;
+	struct usb_device *udev;
+	patch_info *patch_entry;
+	char *config_name, *fw_name;
+	int fw_len = 0;
+	int ret_val;
+
+	int config_len = 0, buf_len = -1;
+	uint8_t *buf = *buff, *config_file_buf = NULL;
+	uint8_t *epatch_buf = NULL;
+
+	struct rtk_epatch *epatch_info = NULL;
+	uint8_t need_download_fw = 1;
+	struct rtk_extension_entry patch_lmp = {0};
+	struct rtk_epatch_entry *p_epatch_entry = NULL;
+	uint16_t lmp_version;
+	uint8_t use_mp_fw = 0;
+	RTKBT_DBG("%s: start", __func__);
+
+	udev = fw_info->udev;
+	patch_entry = fw_info->patch_entry;
+	lmp_version = patch_entry->lmp_sub_default;
+	config_name = patch_entry->config_name;
+	fw_name = patch_entry->patch_name;
+
+	RTKBT_INFO("%s: Default lmp version = 0x%04x, config file name[%s], "
+			"fw file name[%s]", __func__, lmp_version,config_name, fw_name);
+
+/*	ret_val = request_firmware(&cfg, "mp_test", &udev->dev);
+	if (ret_val > 0)
+		config_file_buf = kzalloc(cfg->size, GFP_KERNEL);
+		if (config_file_buf) {
+			memcpy(config_file_buf, cfg->data, cfg->size);
+			use_mp_fw = *config_file_buf;
+			if (1 == use_mp_fw){
+				fw_name = patch_entry->mp_patch_name;
+				RTKBT_WARN("%s: use_mp_fw = %04d, fw file name[%s]", __func__, use_mp_fw,  fw_name);
+			}
+			kfree(config_file_buf);
+			release_firmware(cfg);
+		}
+*/
+	ret_val = request_firmware(&cfg, config_name, &udev->dev);
+	if (ret_val < 0)
+		config_len = 0;
+	else {
+		config_file_buf = kzalloc(cfg->size, GFP_KERNEL);
+		if (!config_file_buf)
+			return -ENOMEM;
+		memcpy(config_file_buf, cfg->data, cfg->size);
+		config_len = cfg->size;
+		release_firmware(cfg);
+	}
+
+	ret_val = request_firmware(&fw, fw_name, &udev->dev);
+	if (ret_val < 0)
+		goto fw_fail;
+	else {
+		epatch_buf = kzalloc(fw->size, GFP_KERNEL);
+		if (!epatch_buf) {
+			release_firmware(fw);
+			goto fw_fail;
+		}
+		memcpy(epatch_buf, fw->data, fw->size);
+		fw_len = fw->size;
+		buf_len = fw_len + config_len;
+		release_firmware(fw);
+	}
+
+	if (lmp_version == ROM_LMP_8723a) {
+		RTKBT_DBG("%s: 8723a -> use old style patch", __func__);
+		if (!memcmp(epatch_buf, RTK_EPATCH_SIGNATURE, 8)) {
+			RTKBT_ERR("%s: 8723a check signature error", __func__);
+			need_download_fw = 0;
+		} else {
+			if (!(buf = kzalloc(buf_len, GFP_KERNEL))) {
+				RTKBT_ERR("%s: Failed to allocate mem for fw&config", __func__);
+				buf_len = -1;
+			} else {
+				RTKBT_DBG("%s: 8723a -> fw copy directly", __func__);
+				memcpy(buf, epatch_buf, buf_len);
+				patch_entry->lmp_sub = *(uint16_t *)(buf + buf_len - config_len - 4);
+				RTKBT_DBG("%s: Config lmp version = 0x%04x", __func__,
+						patch_entry->lmp_sub);
+				kfree(epatch_buf);
+				epatch_buf = NULL;
+				if (config_len)
+					memcpy(buf + buf_len - config_len, config_file_buf, config_len);
+			}
+		}
+	} else {
+		RTKBT_DBG("%s: Not 8723a -> use new style patch", __func__);
+		ret_val = get_eversion(fw_info);
+		if (ret_val < 0) {
+			RTKBT_ERR("%s: Failed to get eversion, errno %d", __func__, ret_val);
+			goto fw_fail;
+		}
+		RTKBT_DBG("%s: Get eversion =%d", __func__, patch_entry->eversion);
+		if (memcmp(epatch_buf + buf_len - config_len - 4 , EXTENSION_SECTION_SIGNATURE, 4)) {
+			RTKBT_ERR("%s: Failed to check extension section signature", __func__);
+			need_download_fw = 0;
+		} else {
+			uint8_t *temp;
+			temp = epatch_buf+buf_len-config_len - 5;
+			do {
+				if (*temp == 0x00) {
+					patch_lmp.opcode = *temp;
+					patch_lmp.length = *(temp-1);
+					if ((patch_lmp.data = kzalloc(patch_lmp.length, GFP_KERNEL))) {
+						int k;
+						for (k = 0; k < patch_lmp.length; k++) {
+							*(patch_lmp.data+k) = *(temp-2-k);
+							RTKBT_DBG("data = 0x%x", *(patch_lmp.data+k));
+						}
+					}
+					RTKBT_DBG("%s: opcode = 0x%x, length = 0x%x, data = 0x%x", __func__,
+							patch_lmp.opcode, patch_lmp.length, *(patch_lmp.data));
+					break;
+				}
+				temp -= *(temp-1) + 2;
+			} while (*temp != 0xFF);
+
+			if (lmp_version != project_id[*(patch_lmp.data)]) {
+				RTKBT_ERR("%s: Default lmp_version 0x%04x, project_id 0x%04x "
+						"-> not match", __func__, lmp_version, project_id[*(patch_lmp.data)]);
+				if (patch_lmp.data)
+					kfree(patch_lmp.data);
+				need_download_fw = 0;
+			} else {
+				RTKBT_INFO("%s: Default lmp_version 0x%04x, project_id 0x%04x "
+						"-> match", __func__, lmp_version, project_id[*(patch_lmp.data)]);
+				if (patch_lmp.data)
+					kfree(patch_lmp.data);
+				if (memcmp(epatch_buf, RTK_EPATCH_SIGNATURE, 8)) {
+					RTKBT_ERR("%s: Check signature error", __func__);
+					need_download_fw = 0;
+				} else {
+					epatch_info = (struct rtk_epatch*)epatch_buf;
+					patch_entry->lmp_sub = (uint16_t)epatch_info->fw_version;
+
+					RTKBT_DBG("%s: lmp version 0x%04x, fw_version 0x%x, "
+							"number_of_total_patch %d", __func__,
+							patch_entry->lmp_sub, epatch_info->fw_version,
+							epatch_info->number_of_total_patch);
+
+					/* Get right epatch entry */
+					p_epatch_entry = get_fw_patch_entry(epatch_info, patch_entry->eversion);
+					if (p_epatch_entry == NULL) {
+						RTKBT_WARN("%s: Failed to get fw patch entry", __func__);
+						ret_val = -1;
+						goto fw_fail ;
+					}
+
+					buf_len = p_epatch_entry->patch_length + config_len;
+					RTKBT_DBG("buf_len = 0x%x", buf_len);
+
+					if (!(buf = kzalloc(buf_len, GFP_KERNEL))) {
+						RTKBT_ERR("%s: Can't alloc memory for  fw&config", __func__);
+						buf_len = -1;
+					} else {
+						memcpy(buf, &epatch_buf[p_epatch_entry->start_offset], p_epatch_entry->patch_length);
+						memcpy(&buf[p_epatch_entry->patch_length-4], &epatch_info->fw_version, 4);
+						kfree(p_epatch_entry);
+					}
+					kfree(epatch_buf);
+					epatch_buf = NULL;
+
+					if (config_len)
+						memcpy(&buf[buf_len - config_len], config_file_buf, config_len);
+				}
+			}
+		}
+	}
+
+	if (config_file_buf)
+		kfree(config_file_buf);
+
+	RTKBT_INFO("%s: fw%s exists, config file%s exists", __func__,
+			(buf_len > 0) ? "" : " not", (config_len > 0) ? "":" not");
+
+	if (buf && buf_len > 0 && need_download_fw)
+		*buff = buf;
+
+	RTKBT_DBG("%s: done", __func__);
+
+	return buf_len;
+
+fw_fail:
+	if (config_file_buf)
+		kfree(config_file_buf);
+	return ret_val;
+}
+
+int get_firmware(firmware_info *fw_info, int cached)
+{
+	patch_info *patch_entry = fw_info->patch_entry;
+
+	RTKBT_INFO("%s: start, cached %d,patch_entry->fw_len= %d", __func__, cached,patch_entry->fw_len);
+
+	if (cached > 0) {
+		if (patch_entry->fw_len > 0) {
+			fw_info->fw_data = kzalloc(patch_entry->fw_len, GFP_KERNEL);
+			if (!fw_info->fw_data)
+				return -ENOMEM;
+			memcpy(fw_info->fw_data, patch_entry->fw_cache, patch_entry->fw_len);
+			fw_info->fw_len = patch_entry->fw_len;
+		} else {
+			fw_info->fw_len = load_firmware(fw_info, &fw_info->fw_data);
+			if (fw_info->fw_len <= 0)
+				return -1;
+		}
+	} else {
+		fw_info->fw_len = load_firmware(fw_info, &fw_info->fw_data);
+		if (fw_info->fw_len <= 0)
+			return -1;
+	}
+
+	return 0;
+}
+
+/*
+ * Open the log message only if in debugging,
+ * or it will decelerate download procedure.
+ */
+int download_data(firmware_info *fw_info)
+{
+	download_cp *cmd_para;
+	download_rp *evt_para;
+	uint8_t *pcur;
+	int pkt_len, frag_num, frag_len;
+	int i, ret_val;
+	int ncmd = 1, step = 1;
+
+	RTKBT_DBG("%s: start", __func__);
+
+	cmd_para = (download_cp *)fw_info->req_para;
+	evt_para = (download_rp *)fw_info->rsp_para;
+	pcur = fw_info->fw_data;
+	pkt_len = CMD_HDR_LEN + sizeof(download_cp);
+	frag_num = fw_info->fw_len / PATCH_SEG_MAX + 1;
+	frag_len = PATCH_SEG_MAX;
+
+	for (i = 0; i < frag_num; i++) {
+		cmd_para->index = i;
+		if (i == (frag_num - 1)) {
+			cmd_para->index |= DATA_END;
+			frag_len = fw_info->fw_len % PATCH_SEG_MAX;
+			pkt_len -= (PATCH_SEG_MAX - frag_len);
+		}
+		fw_info->cmd_hdr->opcode = cpu_to_le16(DOWNLOAD_OPCODE);
+		fw_info->cmd_hdr->plen = sizeof(uint8_t) + frag_len;
+		fw_info->pkt_len = pkt_len;
+		memcpy(cmd_para->data, pcur, frag_len);
+
+		if (step > 0) {
+			ret_val = send_hci_cmd(fw_info);
+			if (ret_val < 0) {
+				RTKBT_DBG("%s: Failed to send frag num %d", __func__, cmd_para->index);
+				return ret_val;
+			} else
+				RTKBT_DBG("%s: Send frag num %d", __func__, cmd_para->index);
+
+			if (--step > 0 && i < frag_num - 1) {
+				RTKBT_DBG("%s: Continue to send frag num %d", __func__, cmd_para->index + 1);
+				pcur += PATCH_SEG_MAX;
+				continue;
+			}
+		}
+
+		while (ncmd > 0) {
+			ret_val = rcv_hci_evt(fw_info);
+			if (ret_val < 0) {
+				RTKBT_ERR("%s: rcv_hci_evt err %d", __func__, ret_val);
+				return ret_val;
+			} else {
+				RTKBT_DBG("%s: Receive acked frag num %d", __func__, evt_para->index);
+				ncmd--;
+			}
+
+			if (0 != evt_para->status) {
+				RTKBT_ERR("%s: Receive acked frag num %d, err status %d",
+						__func__, ret_val, evt_para->status);
+				return -1;
+			}
+
+			if ((evt_para->index & DATA_END) || (evt_para->index == frag_num - 1)) {
+				RTKBT_DBG("%s: Receive last acked index %d", __func__, evt_para->index);
+				goto end;
+			}
+		}
+
+		ncmd = step = fw_info->cmd_cmp->ncmd;
+		pcur += PATCH_SEG_MAX;
+		RTKBT_DBG("%s: HCI command packet num %d", __func__, ncmd);
+	}
+
+	/*
+	 * It is tricky that Host cannot receive DATA_END index from BT
+	 * controller, at least for 8723au. We are doomed if failed.
+	 */
+#if 0
+	/* Continue to receive the responsed events until last index occurs */
+	if (i == frag_num) {
+		RTKBT_DBG("%s: total frag count %d", __func__, frag_num);
+		while (!(evt_para->index & DATA_END)) {
+			ret_val = rcv_hci_evt(fw_info);
+			if (ret_val < 0) {
+				RTKBT_ERR("%s: rcv_hci_evt err %d", __func__, ret_val);
+				return ret_val;
+			}
+			if (0 != evt_para->status)
+				return -1;
+			RTKBT_DBG("%s: continue to receive acked frag num %d", __func__, evt_para->index);
+		}
+	}
+#endif
+end:
+	RTKBT_INFO("%s: done, sent %d frag pkts, received %d frag events",
+			__func__, cmd_para->index, evt_para->index);
+	return fw_info->fw_len;
+}
+
+int download_patch(firmware_info *fw_info, int cached)
+{
+	int ret_val = 0;
+
+	RTKBT_DBG("%s: Download fw patch start, cached %d", __func__, cached);
+
+	if (!fw_info || !fw_info->patch_entry) {
+		RTKBT_ERR("%s: No patch entry exists(fw_info %p)", __func__, fw_info);
+		ret_val = -1;
+		goto end;
+	}
+
+	/*
+	 * step1: get local firmware if existed
+	 * step2: check firmware version
+	 * step3: download firmware if updated
+	 */
+	ret_val = get_firmware(fw_info, cached);
+	if (ret_val < 0) {
+		RTKBT_ERR("%s: Failed to get firmware", __func__);
+		goto end;
+	}
+
+	ret_val = check_fw_version(fw_info);
+	if (ret_val > 0) {
+		ret_val = download_data(fw_info);
+		if (ret_val > 0)
+			RTKBT_DBG("%s: Download fw patch done, fw len %d", __func__, ret_val);
+	}
+	/* Free fw data after download finished */
+	kfree(fw_info->fw_data);
+	fw_info->fw_data = NULL;
+
+end:
+	return ret_val;
+}
+
+firmware_info *firmware_info_init(struct usb_interface *intf)
+{
+	struct usb_device *udev = interface_to_usbdev(intf);
+	firmware_info *fw_info;
+
+	RTKBT_DBG("%s: start", __func__);
+
+	fw_info = kzalloc(sizeof(*fw_info), GFP_KERNEL);
+	if (!fw_info)
+		return NULL;
+
+	fw_info->send_pkt = kzalloc(PKT_LEN, GFP_KERNEL);
+	if (!fw_info->send_pkt) {
+		kfree(fw_info);
+		return NULL;
+	}
+
+	fw_info->rcv_pkt = kzalloc(PKT_LEN, GFP_KERNEL);
+	if (!fw_info->rcv_pkt) {
+		kfree(fw_info->send_pkt);
+		kfree(fw_info);
+		return NULL;
+	}
+
+	fw_info->patch_entry = get_fw_table_entry(udev);
+	if (!fw_info->patch_entry) {
+		kfree(fw_info->rcv_pkt);
+		kfree(fw_info->send_pkt);
+		kfree(fw_info);
+		return NULL;
+	}
+
+	fw_info->intf = intf;
+	fw_info->udev = udev;
+	fw_info->pipe_in = usb_rcvintpipe(fw_info->udev, INTR_EP);
+	fw_info->pipe_out = usb_sndctrlpipe(fw_info->udev, CTRL_EP);
+	fw_info->cmd_hdr = (struct hci_command_hdr *)(fw_info->send_pkt);
+	fw_info->evt_hdr = (struct hci_event_hdr *)(fw_info->rcv_pkt);
+	fw_info->cmd_cmp = (struct hci_ev_cmd_complete *)(fw_info->rcv_pkt + EVT_HDR_LEN);
+	fw_info->req_para = fw_info->send_pkt + CMD_HDR_LEN;
+	fw_info->rsp_para = fw_info->rcv_pkt + EVT_HDR_LEN + CMD_CMP_LEN;
+
+#if BTUSB_RPM
+	RTKBT_INFO("%s: Auto suspend is enabled", __func__);
+	usb_enable_autosuspend(udev);
+	pm_runtime_set_autosuspend_delay(&(udev->dev), 2000);
+#else
+	RTKBT_INFO("%s: Auto suspend is disabled", __func__);
+	usb_disable_autosuspend(udev);
+#endif
+
+#if BTUSB_WAKEUP_HOST
+	device_wakeup_enable(&udev->dev);
+#endif
+
+	return fw_info;
+}
+
+void firmware_info_destroy(struct usb_interface *intf)
+{
+	firmware_info *fw_info;
+	struct usb_device *udev;
+	struct btusb_data *data;
+
+	udev = interface_to_usbdev(intf);
+	data = usb_get_intfdata(intf);
+
+	fw_info = data->fw_info;
+	if (!fw_info)
+		return;
+
+#if BTUSB_RPM
+	usb_disable_autosuspend(udev);
+#endif
+
+	/*
+	 * In order to reclaim fw data mem, we free fw_data immediately
+	 * after download patch finished instead of here.
+	 */
+	kfree(fw_info->rcv_pkt);
+	kfree(fw_info->send_pkt);
+	kfree(fw_info);
+}
+
+static struct usb_driver btusb_driver;
+
+static struct usb_device_id btusb_table[] = {
+	{ .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
+					 USB_DEVICE_ID_MATCH_INT_INFO,
+	  .idVendor = 0x0bda,
+	  .bInterfaceClass = 0xe0,
+	  .bInterfaceSubClass = 0x01,
+	  .bInterfaceProtocol = 0x01 },
+
+	{ .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
+					 USB_DEVICE_ID_MATCH_INT_INFO,
+	  .idVendor = 0x13d3,
+	  .bInterfaceClass = 0xe0,
+	  .bInterfaceSubClass = 0x01,
+	  .bInterfaceProtocol = 0x01 },
+
+	{ }
+};
+
+MODULE_DEVICE_TABLE(usb, btusb_table);
+
+static int inc_tx(struct btusb_data *data)
+{
+	unsigned long flags;
+	int rv;
+
+	spin_lock_irqsave(&data->txlock, flags);
+	rv = test_bit(BTUSB_SUSPENDING, &data->flags);
+	if (!rv)
+		data->tx_in_flight++;
+	spin_unlock_irqrestore(&data->txlock, flags);
+
+	return rv;
+}
+
+void check_sco_event(struct urb *urb)
+{
+	u8* opcode = (u8*)(urb->transfer_buffer);
+	u8 status;
+	static uint16_t sco_handle = 0;
+	uint16_t handle;
+	struct hci_dev *hdev = urb->context;
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+
+	switch (*opcode) {
+	case HCI_EV_SYNC_CONN_COMPLETE:
+		RTKBT_INFO("%s: HCI_EV_SYNC_CONN_COMPLETE(0x%02x)", __func__, *opcode);
+		status = *(opcode + 2);
+		sco_handle = *(opcode + 3) | *(opcode + 4) << 8;
+		if (status == 0) {
+			hdev->conn_hash.sco_num++;
+			schedule_work(&data->work);
+		}
+		break;
+	case HCI_EV_DISCONN_COMPLETE:
+		RTKBT_INFO("%s: HCI_EV_DISCONN_COMPLETE(0x%02x)", __func__, *opcode);
+		status = *(opcode + 2);
+		handle = *(opcode + 3) | *(opcode + 4) << 8;
+		if (status == 0 && sco_handle == handle) {
+			hdev->conn_hash.sco_num--;
+			schedule_work(&data->work);
+		}
+		break;
+	default:
+		RTKBT_DBG("%s: event 0x%02x", __func__, *opcode);
+		break;
+	}
+}
+
+static void btusb_intr_complete(struct urb *urb)
+{
+	struct hci_dev *hdev = urb->context;
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+	int err;
+
+	RTKBT_DBG("%s: urb %p status %d count %d ", __func__,
+			urb, urb->status, urb->actual_length);
+
+	check_sco_event(urb);
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		return;
+
+	
+	if (urb->status == 0) {
+		hdev->stat.byte_rx += urb->actual_length;
+
+		if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
+						urb->transfer_buffer,
+						urb->actual_length) < 0) {
+			RTKBT_ERR("%s: Corrupted event packet", __func__);
+			hdev->stat.err_rx++;
+		}
+	}
+	/* Avoid suspend failed when usb_kill_urb */
+	else if(urb->status == -ENOENT)	{
+		return;
+	}
+
+
+	if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
+		return;
+
+	usb_mark_last_busy(data->udev);
+	usb_anchor_urb(urb, &data->intr_anchor);
+
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err < 0) {
+		/* EPERM: urb is being killed;
+		 * ENODEV: device got disconnected */
+		if (err != -EPERM && err != -ENODEV)
+			RTKBT_ERR("%s: Failed to re-submit urb %p, err %d",
+					__func__, urb, err);
+		usb_unanchor_urb(urb);
+	}
+}
+
+static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
+{
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+	struct urb *urb;
+	unsigned char *buf;
+	unsigned int pipe;
+	int err, size;
+
+	if (!data->intr_ep)
+		return -ENODEV;
+
+	urb = usb_alloc_urb(0, mem_flags);
+	if (!urb)
+		return -ENOMEM;
+
+	size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
+
+	buf = kmalloc(size, mem_flags);
+	if (!buf) {
+		usb_free_urb(urb);
+		return -ENOMEM;
+	}
+
+	RTKBT_DBG("%s: mMaxPacketSize %d, bEndpointAddress 0x%02x",
+			__func__, size, data->intr_ep->bEndpointAddress);
+
+	pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
+
+	usb_fill_int_urb(urb, data->udev, pipe, buf, size,
+						btusb_intr_complete, hdev,
+						data->intr_ep->bInterval);
+
+	urb->transfer_flags |= URB_FREE_BUFFER;
+
+	usb_anchor_urb(urb, &data->intr_anchor);
+
+	err = usb_submit_urb(urb, mem_flags);
+	if (err < 0) {
+		RTKBT_ERR("%s: Failed to submit urb %p, err %d",
+				__func__, urb, err);
+		usb_unanchor_urb(urb);
+	}
+
+	usb_free_urb(urb);
+
+	return err;
+}
+
+static void btusb_bulk_complete(struct urb *urb)
+{
+	struct hci_dev *hdev = urb->context;
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+	int err;
+
+	RTKBT_DBG("%s: urb %p status %d count %d",
+			__func__, urb, urb->status, urb->actual_length);
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		return;
+
+	if (urb->status == 0) {
+		hdev->stat.byte_rx += urb->actual_length;
+
+		if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
+						urb->transfer_buffer,
+						urb->actual_length) < 0) {
+			RTKBT_ERR("%s: Corrupted ACL packet", __func__);
+			hdev->stat.err_rx++;
+		}
+	}
+	/* Avoid suspend failed when usb_kill_urb */
+	else if(urb->status == -ENOENT)	{
+		return;
+	}
+
+
+	if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
+		return;
+
+	usb_anchor_urb(urb, &data->bulk_anchor);
+	usb_mark_last_busy(data->udev);
+
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err < 0) {
+		/* -EPERM: urb is being killed;
+		 * -ENODEV: device got disconnected */
+		if (err != -EPERM && err != -ENODEV)
+			RTKBT_ERR("btusb_bulk_complete %s urb %p failed to resubmit (%d)",
+						hdev->name, urb, -err);
+		usb_unanchor_urb(urb);
+	}
+}
+
+static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
+{
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+	struct urb *urb;
+	unsigned char *buf;
+	unsigned int pipe;
+	int err, size = HCI_MAX_FRAME_SIZE;
+
+	RTKBT_DBG("%s: hdev name %s", __func__, hdev->name);
+
+	if (!data->bulk_rx_ep)
+		return -ENODEV;
+
+	urb = usb_alloc_urb(0, mem_flags);
+	if (!urb)
+		return -ENOMEM;
+
+	buf = kmalloc(size, mem_flags);
+	if (!buf) {
+		usb_free_urb(urb);
+		return -ENOMEM;
+	}
+
+	pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
+
+	usb_fill_bulk_urb(urb, data->udev, pipe,
+					buf, size, btusb_bulk_complete, hdev);
+
+	urb->transfer_flags |= URB_FREE_BUFFER;
+
+	usb_mark_last_busy(data->udev);
+	usb_anchor_urb(urb, &data->bulk_anchor);
+
+	err = usb_submit_urb(urb, mem_flags);
+	if (err < 0) {
+		RTKBT_ERR("%s: Failed to submit urb %p, err %d", __func__, urb, err);
+		usb_unanchor_urb(urb);
+	}
+
+	usb_free_urb(urb);
+
+	return err;
+}
+
+static void btusb_isoc_complete(struct urb *urb)
+{
+	struct hci_dev *hdev = urb->context;
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+	int i, err;
+
+
+	RTKBT_DBG("%s: urb %p status %d count %d",
+			__func__, urb, urb->status, urb->actual_length);
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		return;
+
+	if (urb->status == 0) {
+		for (i = 0; i < urb->number_of_packets; i++) {
+			unsigned int offset = urb->iso_frame_desc[i].offset;
+			unsigned int length = urb->iso_frame_desc[i].actual_length;
+
+			if (urb->iso_frame_desc[i].status)
+				continue;
+
+			hdev->stat.byte_rx += length;
+
+			if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
+						urb->transfer_buffer + offset,
+								length) < 0) {
+				RTKBT_ERR("%s: Corrupted SCO packet", __func__);
+				hdev->stat.err_rx++;
+			}
+		}
+	}
+	/* Avoid suspend failed when usb_kill_urb */
+	else if(urb->status == -ENOENT)	{
+		return;
+	}
+
+
+	if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
+		return;
+
+	usb_anchor_urb(urb, &data->isoc_anchor);
+	i = 0;
+retry:
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err < 0) {
+		/* -EPERM: urb is being killed;
+		 * -ENODEV: device got disconnected */
+		if (err != -EPERM && err != -ENODEV)
+			RTKBT_ERR("%s: Failed to re-sumbit urb %p, retry %d, err %d",
+					__func__, urb, i, err);
+		if (i < 10) {
+			i++;
+			mdelay(1);
+			goto retry;
+		}
+
+		usb_unanchor_urb(urb);
+	}
+}
+
+static inline void fill_isoc_descriptor(struct urb *urb, int len, int mtu)
+{
+	int i, offset = 0;
+
+	RTKBT_DBG("%s: len %d mtu %d", __func__, len, mtu);
+
+	for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
+					i++, offset += mtu, len -= mtu) {
+		urb->iso_frame_desc[i].offset = offset;
+		urb->iso_frame_desc[i].length = mtu;
+	}
+
+	if (len && i < BTUSB_MAX_ISOC_FRAMES) {
+		urb->iso_frame_desc[i].offset = offset;
+		urb->iso_frame_desc[i].length = len;
+		i++;
+	}
+
+	urb->number_of_packets = i;
+}
+
+static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
+{
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+	struct urb *urb;
+	unsigned char *buf;
+	unsigned int pipe;
+	int err, size;
+
+	if (!data->isoc_rx_ep)
+		return -ENODEV;
+
+	urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
+	if (!urb)
+		return -ENOMEM;
+
+	size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
+						BTUSB_MAX_ISOC_FRAMES;
+
+	buf = kmalloc(size, mem_flags);
+	if (!buf) {
+		usb_free_urb(urb);
+		return -ENOMEM;
+	}
+
+	pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
+
+	urb->dev      = data->udev;
+	urb->pipe     = pipe;
+	urb->context  = hdev;
+	urb->complete = btusb_isoc_complete;
+	urb->interval = data->isoc_rx_ep->bInterval;
+
+	urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
+	urb->transfer_buffer = buf;
+	urb->transfer_buffer_length = size;
+
+	fill_isoc_descriptor(urb, size,
+			le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
+
+	usb_anchor_urb(urb, &data->isoc_anchor);
+
+	err = usb_submit_urb(urb, mem_flags);
+	if (err < 0) {
+		RTKBT_ERR("%s: Failed to submit urb %p, err %d", __func__, urb, err);
+		usb_unanchor_urb(urb);
+	}
+
+	usb_free_urb(urb);
+
+	return err;
+}
+
+static void btusb_tx_complete(struct urb *urb)
+{
+	struct sk_buff *skb = urb->context;
+	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		goto done;
+
+	if (!urb->status)
+		hdev->stat.byte_tx += urb->transfer_buffer_length;
+	else
+		hdev->stat.err_tx++;
+
+done:
+	spin_lock(&data->txlock);
+	data->tx_in_flight--;
+	spin_unlock(&data->txlock);
+
+	kfree(urb->setup_packet);
+
+	kfree_skb(skb);
+}
+
+static void btusb_isoc_tx_complete(struct urb *urb)
+{
+	struct sk_buff *skb = urb->context;
+	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
+
+	RTKBT_DBG("%s: urb %p status %d count %d",
+			__func__, urb, urb->status, urb->actual_length);
+
+	if (skb && hdev) {
+		if (!test_bit(HCI_RUNNING, &hdev->flags))
+			goto done;
+
+		if (!urb->status)
+			hdev->stat.byte_tx += urb->transfer_buffer_length;
+		else
+			hdev->stat.err_tx++;
+	} else
+		RTKBT_ERR("%s: skb 0x%p hdev 0x%p", __func__, skb, hdev);
+
+done:
+	kfree(urb->setup_packet);
+
+	kfree_skb(skb);
+}
+
+static int btusb_open(struct hci_dev *hdev)
+{
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+	int err = 0;
+
+	RTKBT_INFO("%s: Start, PM usage count %d", __func__,
+			atomic_read(&(data->intf->pm_usage_cnt)));
+
+	err = usb_autopm_get_interface(data->intf);
+	if (err < 0)
+		return err;
+
+	data->intf->needs_remote_wakeup = 1;
+
+	err = download_patch(data->fw_info, 1);
+	if (err < 0) goto failed;
+
+	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
+		goto done;
+
+	if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
+		goto done;
+
+	err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
+	if (err < 0)
+		goto failed;
+
+	err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
+	if (err < 0) {
+		mdelay(URB_CANCELING_DELAY_MS);
+		usb_kill_anchored_urbs(&data->intr_anchor);
+		goto failed;
+	}
+
+	set_bit(BTUSB_BULK_RUNNING, &data->flags);
+	btusb_submit_bulk_urb(hdev, GFP_KERNEL);
+
+done:
+	usb_autopm_put_interface(data->intf);
+	RTKBT_INFO("%s: End, PM usage count %d", __func__,
+			atomic_read(&(data->intf->pm_usage_cnt)));
+	return 0;
+
+failed:
+	clear_bit(BTUSB_INTR_RUNNING, &data->flags);
+	clear_bit(HCI_RUNNING, &hdev->flags);
+	usb_autopm_put_interface(data->intf);
+	RTKBT_ERR("%s: Failed, PM usage count %d", __func__,
+			atomic_read(&(data->intf->pm_usage_cnt)));
+	return err;
+}
+
+static void btusb_stop_traffic(struct btusb_data *data)
+{
+	mdelay(URB_CANCELING_DELAY_MS);
+	usb_kill_anchored_urbs(&data->intr_anchor);
+	usb_kill_anchored_urbs(&data->bulk_anchor);
+	usb_kill_anchored_urbs(&data->isoc_anchor);
+}
+
+static int btusb_close(struct hci_dev *hdev)
+{
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+	int i, err;
+
+	RTKBT_INFO("%s: hci running %lu", __func__, hdev->flags & HCI_RUNNING);
+
+	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
+		return 0;
+
+	for (i = 0; i < NUM_REASSEMBLY; i++) {
+		if (hdev->reassembly[i]) {
+			RTKBT_DBG("%s: free ressembly[%d]", __func__, i);
+			kfree_skb(hdev->reassembly[i]);
+			hdev->reassembly[i] = NULL;
+		}
+	}
+
+	cancel_work_sync(&data->work);
+	cancel_work_sync(&data->waker);
+
+	clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
+	clear_bit(BTUSB_BULK_RUNNING, &data->flags);
+	clear_bit(BTUSB_INTR_RUNNING, &data->flags);
+
+	btusb_stop_traffic(data);
+	err = usb_autopm_get_interface(data->intf);
+	if (err < 0)
+		goto failed;
+
+	data->intf->needs_remote_wakeup = 0;
+	usb_autopm_put_interface(data->intf);
+
+failed:
+	mdelay(URB_CANCELING_DELAY_MS);
+	usb_scuttle_anchored_urbs(&data->deferred);
+	return 0;
+}
+
+static int btusb_flush(struct hci_dev *hdev)
+{
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+
+	RTKBT_DBG("%s", __func__);
+
+	mdelay(URB_CANCELING_DELAY_MS);
+	usb_kill_anchored_urbs(&data->tx_anchor);
+
+	return 0;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
+static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+#else
+static int btusb_send_frame(struct sk_buff *skb)
+{
+	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
+#endif
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+	struct usb_ctrlrequest *dr;
+	struct urb *urb;
+	unsigned int pipe;
+	int err;
+	int retries = 0;
+
+	RTKBT_DBG("%s: hdev %p, btusb data %p, pkt type %d",
+			__func__, hdev, data, bt_cb(skb)->pkt_type);
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		return -EBUSY;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
+	skb->dev = (void *)hdev;
+#endif
+
+	switch (bt_cb(skb)->pkt_type) {
+	case HCI_COMMAND_PKT:
+		print_command(skb);
+		urb = usb_alloc_urb(0, GFP_ATOMIC);
+		if (!urb)
+			return -ENOMEM;
+
+		dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
+		if (!dr) {
+			usb_free_urb(urb);
+			return -ENOMEM;
+		}
+
+		dr->bRequestType = data->cmdreq_type;
+		dr->bRequest     = 0;
+		dr->wIndex       = 0;
+		dr->wValue       = 0;
+		dr->wLength      = __cpu_to_le16(skb->len);
+
+		pipe = usb_sndctrlpipe(data->udev, 0x00);
+
+		usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
+				skb->data, skb->len, btusb_tx_complete, skb);
+
+		hdev->stat.cmd_tx++;
+		break;
+
+	case HCI_ACLDATA_PKT:
+		print_acl(skb, 1);
+		if (!data->bulk_tx_ep)
+			return -ENODEV;
+
+		urb = usb_alloc_urb(0, GFP_ATOMIC);
+		if (!urb)
+			return -ENOMEM;
+
+		pipe = usb_sndbulkpipe(data->udev,
+					data->bulk_tx_ep->bEndpointAddress);
+
+		usb_fill_bulk_urb(urb, data->udev, pipe,
+				skb->data, skb->len, btusb_tx_complete, skb);
+
+		hdev->stat.acl_tx++;
+		break;
+
+	case HCI_SCODATA_PKT:
+		print_sco(skb, 1);
+		if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1) {
+			kfree(skb);
+			return -ENODEV;
+		}
+
+		urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
+		if (!urb) {
+			RTKBT_ERR("%s: Failed to allocate mem for sco pkts", __func__);
+			kfree(skb);
+			return -ENOMEM;
+		}
+
+		pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
+
+		usb_fill_int_urb(urb, data->udev, pipe,
+				skb->data, skb->len, btusb_isoc_tx_complete,
+				skb, data->isoc_tx_ep->bInterval);
+
+		urb->transfer_flags  = URB_ISO_ASAP;
+
+		fill_isoc_descriptor(urb, skb->len,
+				le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
+
+		hdev->stat.sco_tx++;
+		goto skip_waking;
+
+	default:
+		return -EILSEQ;
+	}
+
+	err = inc_tx(data);
+	if (err) {
+		usb_anchor_urb(urb, &data->deferred);
+		schedule_work(&data->waker);
+		err = 0;
+		goto done;
+	}
+
+skip_waking:
+	usb_anchor_urb(urb, &data->tx_anchor);
+retry:
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err < 0) {
+		RTKBT_ERR("%s: Failed to submit urb %p, pkt type %d, err %d, retries %d",
+				__func__, urb, bt_cb(skb)->pkt_type, err, retries);
+		if ((bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) && (retries < 10)) {
+			mdelay(1);
+
+			if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT)
+				print_error_command(skb);
+			retries++;
+			goto retry;
+		}
+		kfree(urb->setup_packet);
+		usb_unanchor_urb(urb);
+	} else
+		usb_mark_last_busy(data->udev);
+	usb_free_urb(urb);
+
+done:
+	return err;
+}
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(3, 4, 0)
+static void btusb_destruct(struct hci_dev *hdev)
+{
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+
+	RTKBT_DBG("%s: name %s", __func__, hdev->name);
+
+	kfree(data);
+}
+#endif
+
+static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
+{
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+
+	RTKBT_DBG("%s: name %s, evt %d", __func__, hdev->name, evt);
+
+	if (hdev->conn_hash.sco_num != data->sco_num) {
+		data->sco_num = hdev->conn_hash.sco_num;
+		schedule_work(&data->work);
+	}
+}
+
+static inline int set_isoc_interface(struct hci_dev *hdev, int altsetting)
+{
+	struct btusb_data *data = GET_DRV_DATA(hdev);
+	struct usb_interface *intf = data->isoc;
+	struct usb_endpoint_descriptor *ep_desc;
+	int i, err;
+
+	if (!data->isoc)
+		return -ENODEV;
+
+	err = usb_set_interface(data->udev, 1, altsetting);
+	if (err < 0) {
+		RTKBT_ERR("%s: Failed to set interface, altsetting %d, err %d",
+				__func__, altsetting, err);
+		return err;
+	}
+
+	data->isoc_altsetting = altsetting;
+
+	data->isoc_tx_ep = NULL;
+	data->isoc_rx_ep = NULL;
+
+	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
+		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
+
+		if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
+			data->isoc_tx_ep = ep_desc;
+			continue;
+		}
+
+		if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
+			data->isoc_rx_ep = ep_desc;
+			continue;
+		}
+	}
+
+	if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
+		RTKBT_ERR("%s: Invalid SCO descriptors", __func__);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void btusb_work(struct work_struct *work)
+{
+	struct btusb_data *data = container_of(work, struct btusb_data, work);
+	struct hci_dev *hdev = data->hdev;
+	int err;
+	int new_alts;
+
+	if (hdev->conn_hash.sco_num > 0) {
+		if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
+			err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
+			if (err < 0) {
+				clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
+				mdelay(URB_CANCELING_DELAY_MS);
+				usb_kill_anchored_urbs(&data->isoc_anchor);
+				return;
+			}
+
+			set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
+		}
+#if LINUX_VERSION_CODE > KERNEL_VERSION(3, 7, 1)
+		if (hdev->voice_setting & 0x0020) {
+			static const int alts[3] = { 2, 4, 5 };
+			new_alts = alts[hdev->conn_hash.sco_num - 1];
+		} else{
+			new_alts = hdev->conn_hash.sco_num;
+		}
+		if (data->isoc_altsetting != new_alts) {
+#else
+		if (data->isoc_altsetting != 2) {
+			new_alts = 2;
+#endif
+
+			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
+			mdelay(URB_CANCELING_DELAY_MS);
+			usb_kill_anchored_urbs(&data->isoc_anchor);
+
+			if (set_isoc_interface(hdev, new_alts) < 0)
+				return;
+		}
+
+		if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
+			if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
+				clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
+			else
+				btusb_submit_isoc_urb(hdev, GFP_KERNEL);
+		}
+	} else {
+		clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
+		mdelay(URB_CANCELING_DELAY_MS);
+		usb_kill_anchored_urbs(&data->isoc_anchor);
+
+		set_isoc_interface(hdev, 0);
+		if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
+			usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
+	}
+}
+
+static void btusb_waker(struct work_struct *work)
+{
+	struct btusb_data *data = container_of(work, struct btusb_data, waker);
+	int err;
+
+	RTKBT_DBG("%s: PM usage count %d", __func__,
+			atomic_read(&data->intf->pm_usage_cnt));
+
+	err = usb_autopm_get_interface(data->intf);
+	if (err < 0)
+		return;
+
+	usb_autopm_put_interface(data->intf);
+}
+
+
+//#ifdef CONFIG_HAS_EARLYSUSPEND
+#if 0
+static void btusb_early_suspend(struct early_suspend *h)
+{
+	struct btusb_data *data;
+	firmware_info *fw_info;
+	patch_info *patch_entry;
+
+	RTKBT_INFO("%s", __func__);
+
+	data = container_of(h, struct btusb_data, early_suspend);
+	fw_info = data->fw_info;
+	patch_entry = fw_info->patch_entry;
+
+	patch_entry->fw_len = load_firmware(fw_info, &patch_entry->fw_cache);
+	if (patch_entry->fw_len <= 0) {
+		/* We may encount failure in loading firmware, just give a warning */
+		RTKBT_WARN("%s: Failed to load firmware", __func__);
+	}
+}
+
+static void btusb_late_resume(struct early_suspend *h)
+{
+	struct btusb_data *data;
+	firmware_info *fw_info;
+	patch_info *patch_entry;
+
+	RTKBT_INFO("%s", __func__);
+
+	data = container_of(h, struct btusb_data, early_suspend);
+	fw_info = data->fw_info;
+	patch_entry = fw_info->patch_entry;
+
+	/* Reclaim fw buffer when bt usb resumed */
+	if (patch_entry->fw_len > 0) {
+		kfree(patch_entry->fw_cache);
+		patch_entry->fw_cache = NULL;
+		patch_entry->fw_len = 0;
+	}
+}
+#else
+int bt_pm_notify(struct notifier_block *notifier, ulong pm_event, void *unused)
+{
+	struct btusb_data *data;
+	firmware_info *fw_info;
+	patch_info *patch_entry;
+	struct usb_device *udev;
+
+	RTKBT_INFO("%s: pm event %ld", __func__, pm_event);
+
+	data = container_of(notifier, struct btusb_data, pm_notifier);
+	fw_info = data->fw_info;
+	patch_entry = fw_info->patch_entry;
+	udev = fw_info->udev;
+
+	switch (pm_event) {
+	case PM_SUSPEND_PREPARE:
+	case PM_HIBERNATION_PREPARE:
+		patch_entry->fw_len = load_firmware(fw_info, &patch_entry->fw_cache);
+		if (patch_entry->fw_len <= 0) {
+		/* We may encount failure in loading firmware, just give a warning */
+			RTKBT_WARN("%s: Failed to load firmware", __func__);
+		}
+
+		if (!device_may_wakeup(&udev->dev)) {
+#if (CONFIG_RESET_RESUME || CONFIG_BLUEDROID)
+			RTKBT_INFO("%s:remote wakeup not supported, reset resume supported", __func__);
+#else
+			fw_info->intf->needs_binding = 1;
+			RTKBT_INFO("%s:remote wakeup not supported, binding needed", __func__);
+#endif
+		}
+		break;
+
+	case PM_POST_SUSPEND:
+	case PM_POST_HIBERNATION:
+	case PM_POST_RESTORE:
+		/* Reclaim fw buffer when bt usb resumed */
+		if (patch_entry->fw_len > 0) {
+			kfree(patch_entry->fw_cache);
+			patch_entry->fw_cache = NULL;
+			patch_entry->fw_len = 0;
+		}
+#if BTUSB_RPM
+		usb_disable_autosuspend(udev);
+		usb_enable_autosuspend(udev);
+		pm_runtime_set_autosuspend_delay(&(udev->dev), 2000);
+#endif
+		break;
+
+	default:
+		break;
+	}
+
+	return NOTIFY_DONE;
+}
+#endif
+
+static int btusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	struct usb_device *udev = interface_to_usbdev(intf);
+	struct usb_endpoint_descriptor *ep_desc;
+	struct btusb_data *data;
+	struct hci_dev *hdev;
+	firmware_info *fw_info;
+	int i, err=0;
+
+	RTKBT_INFO("%s: usb_interface %p, bInterfaceNumber %d, idVendor 0x%04x, "
+			"idProduct 0x%04x", __func__, intf,
+			intf->cur_altsetting->desc.bInterfaceNumber,
+			id->idVendor, id->idProduct);
+
+	/* interface numbers are hardcoded in the spec */
+	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
+		return -ENODEV;
+
+	RTKBT_DBG("%s: can wakeup = %x, may wakeup = %x", __func__,
+			device_can_wakeup(&udev->dev), device_may_wakeup(&udev->dev));
+
+	data = rtk_alloc(intf);
+	if (!data)
+		return -ENOMEM;
+
+	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
+		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
+
+		if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
+			data->intr_ep = ep_desc;
+			continue;
+		}
+
+		if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
+			data->bulk_tx_ep = ep_desc;
+			continue;
+		}
+
+		if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
+			data->bulk_rx_ep = ep_desc;
+			continue;
+		}
+	}
+
+	if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
+		rtk_free(data);
+		return -ENODEV;
+	}
+
+	data->cmdreq_type = USB_TYPE_CLASS;
+
+	data->udev = udev;
+	data->intf = intf;
+
+	spin_lock_init(&data->lock);
+
+	INIT_WORK(&data->work, btusb_work);
+	INIT_WORK(&data->waker, btusb_waker);
+	spin_lock_init(&data->txlock);
+
+	init_usb_anchor(&data->tx_anchor);
+	init_usb_anchor(&data->intr_anchor);
+	init_usb_anchor(&data->bulk_anchor);
+	init_usb_anchor(&data->isoc_anchor);
+	init_usb_anchor(&data->deferred);
+
+	fw_info = firmware_info_init(intf);
+	if (fw_info)
+		data->fw_info = fw_info;
+	else {
+		RTKBT_WARN("%s: Failed to initialize fw info", __func__);
+		/* Skip download patch */
+		goto end;
+	}
+
+	RTKBT_INFO("%s: download begining...", __func__);
+
+#if CONFIG_BLUEDROID
+	mutex_lock(&btchr_mutex);
+#endif
+	err = download_patch(fw_info, 0);
+	/* If download failed, we just throw out a warning */
+	if (err < 0)
+		RTKBT_WARN("%s: Failed to download fw patch", __func__);
+#if CONFIG_BLUEDROID
+	mutex_unlock(&btchr_mutex);
+#endif
+
+	RTKBT_INFO("%s: download ending...", __func__);
+
+	hdev = hci_alloc_dev();
+	if (!hdev) {
+		rtk_free(data);
+		data = NULL;
+		return -ENOMEM;
+	}
+
+	HDEV_BUS = HCI_USB;
+
+	data->hdev = hdev;
+
+	SET_HCIDEV_DEV(hdev, &intf->dev);
+
+	hdev->open     = btusb_open;
+	hdev->close    = btusb_close;
+	hdev->flush    = btusb_flush;
+	hdev->send     = btusb_send_frame;
+	hdev->notify   = btusb_notify;
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(3, 4, 0)
+	hci_set_drvdata(hdev, data);
+#else
+	hdev->driver_data = data;
+	hdev->destruct = btusb_destruct;
+	hdev->owner = THIS_MODULE;
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 7, 1)
+	if (!reset_on_close){
+		/* set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); */
+		RTKBT_DBG("%s: Set HCI_QUIRK_RESET_ON_CLOSE", __func__);
+	}
+#endif
+
+	/* Interface numbers are hardcoded in the specification */
+	data->isoc = usb_ifnum_to_if(data->udev, 1);
+	if (data->isoc) {
+		err = usb_driver_claim_interface(&btusb_driver,
+							data->isoc, data);
+		if (err < 0) {
+			hci_free_dev(hdev);
+			hdev = NULL;
+			rtk_free(data);
+			data = NULL;
+			return err;
+		}
+	}
+
+	err = hci_register_dev(hdev);
+	if (err < 0) {
+		hci_free_dev(hdev);
+		hdev = NULL;
+		rtk_free(data);
+		data = NULL;
+		return err;
+	}
+
+	usb_set_intfdata(intf, data);
+
+//#ifdef CONFIG_HAS_EARLYSUSPEND
+#if 0
+	data->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN;
+	data->early_suspend.suspend = btusb_early_suspend;
+	data->early_suspend.resume = btusb_late_resume;
+	register_early_suspend(&data->early_suspend);
+#else
+	data->pm_notifier.notifier_call = bt_pm_notify;
+	register_pm_notifier(&data->pm_notifier);
+#endif
+
+#if CONFIG_BLUEDROID
+	RTKBT_INFO("%s: Check bt reset flag %d", __func__, bt_reset);
+	/* Report hci hardware error after everthing is ready,
+	 * especially hci register is completed. Or, btchr_poll
+	 * will get null hci dev when hotplug in.
+	 */
+	if (bt_reset == 1) {
+		hci_hardware_error();
+		bt_reset = 0;
+	} else
+		bt_reset = 0; /* Clear and reset it anyway */
+#endif
+
+end:
+	return 0;
+}
+
+static void btusb_disconnect(struct usb_interface *intf)
+{
+	struct btusb_data *data = usb_get_intfdata(intf);
+	struct hci_dev *hdev = NULL;
+
+	RTKBT_INFO("%s: usb_interface %p, bInterfaceNumber %d",
+			__func__, intf, intf->cur_altsetting->desc.bInterfaceNumber);
+
+	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
+		return;
+
+	if (data)
+		hdev = data->hdev;
+	else {
+		RTKBT_WARN("%s: Failed to get bt usb data[Null]", __func__);
+		return;
+	}
+
+//#ifdef CONFIG_HAS_EARLYSUSPEND
+#if 0
+	unregister_early_suspend(&data->early_suspend);
+#else
+	unregister_pm_notifier(&data->pm_notifier);
+#endif
+
+	firmware_info_destroy(intf);
+
+#if CONFIG_BLUEDROID
+	if (test_bit(HCI_RUNNING, &hdev->flags)) {
+		RTKBT_INFO("%s: Set BT reset flag", __func__);
+		bt_reset = 1;
+	}
+#endif
+
+	usb_set_intfdata(data->intf, NULL);
+
+	if (data->isoc)
+		usb_set_intfdata(data->isoc, NULL);
+
+	hci_unregister_dev(hdev);
+
+	if (intf == data->isoc)
+		usb_driver_release_interface(&btusb_driver, data->intf);
+	else if (data->isoc)
+		usb_driver_release_interface(&btusb_driver, data->isoc);
+
+#if !CONFIG_BLUEDROID
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(3, 4, 0)
+	__hci_dev_put(hdev);
+#endif
+#endif
+
+	hci_free_dev(hdev);
+	rtk_free(data);
+	data = NULL;
+}
+
+#ifdef CONFIG_PM
+static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct btusb_data *data = usb_get_intfdata(intf);
+	firmware_info *fw_info = data->fw_info;
+
+	RTKBT_INFO("%s: event 0x%x, suspend count %d", __func__,
+			message.event, data->suspend_count);
+
+	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
+		return 0;
+
+	if (!test_bit(HCI_RUNNING, &data->hdev->flags))
+		set_bt_onoff(fw_info, 1);
+
+	if (data->suspend_count++)
+		return 0;
+
+	spin_lock_irq(&data->txlock);
+	if (!((message.event & PM_EVENT_AUTO) && data->tx_in_flight)) {
+		set_bit(BTUSB_SUSPENDING, &data->flags);
+		spin_unlock_irq(&data->txlock);
+	} else {
+		spin_unlock_irq(&data->txlock);
+		data->suspend_count--;
+		RTKBT_ERR("%s: Failed to enter suspend", __func__);
+		return -EBUSY;
+	}
+
+	cancel_work_sync(&data->work);
+
+	btusb_stop_traffic(data);
+	mdelay(URB_CANCELING_DELAY_MS);
+	usb_kill_anchored_urbs(&data->tx_anchor);
+
+	return 0;
+}
+
+static void play_deferred(struct btusb_data *data)
+{
+	struct urb *urb;
+	int err;
+
+	while ((urb = usb_get_from_anchor(&data->deferred))) {
+		usb_anchor_urb(urb, &data->tx_anchor);
+		err = usb_submit_urb(urb, GFP_ATOMIC);
+		if (err < 0) {
+			RTKBT_ERR("%s: Failed to submit urb %p, err %d",
+					__func__, urb, err);
+			kfree(urb->setup_packet);
+			usb_unanchor_urb(urb);
+		} else {
+			usb_mark_last_busy(data->udev);
+		}
+		usb_free_urb(urb);
+
+		data->tx_in_flight++;
+	}
+	mdelay(URB_CANCELING_DELAY_MS);
+	usb_scuttle_anchored_urbs(&data->deferred);
+}
+
+static int btusb_resume(struct usb_interface *intf)
+{
+	struct btusb_data *data = usb_get_intfdata(intf);
+	struct hci_dev *hdev = data->hdev;
+	firmware_info *fw_info = data->fw_info;
+	int err = 0;
+
+	RTKBT_INFO("%s: Suspend count %d", __func__, data->suspend_count);
+
+	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
+		return 0;
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
+		RTKBT_INFO("%s: Bt is off, download patch before bt is on", __func__);
+		download_patch(fw_info, 1);
+	}
+
+	if (--data->suspend_count)
+		return 0;
+
+	if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
+		err = btusb_submit_intr_urb(hdev, GFP_NOIO);
+		if (err < 0) {
+			clear_bit(BTUSB_INTR_RUNNING, &data->flags);
+			goto failed;
+		}
+	}
+
+	if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
+		err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
+		if (err < 0) {
+			clear_bit(BTUSB_BULK_RUNNING, &data->flags);
+			goto failed;
+		}
+
+		btusb_submit_bulk_urb(hdev, GFP_NOIO);
+	}
+
+	if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
+		if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
+			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
+		else
+			btusb_submit_isoc_urb(hdev, GFP_NOIO);
+	}
+
+	spin_lock_irq(&data->txlock);
+	play_deferred(data);
+	clear_bit(BTUSB_SUSPENDING, &data->flags);
+	spin_unlock_irq(&data->txlock);
+	schedule_work(&data->work);
+
+	return 0;
+
+failed:
+	mdelay(URB_CANCELING_DELAY_MS);
+	usb_scuttle_anchored_urbs(&data->deferred);
+	spin_lock_irq(&data->txlock);
+	clear_bit(BTUSB_SUSPENDING, &data->flags);
+	spin_unlock_irq(&data->txlock);
+
+	return err;
+}
+#endif
+
+static struct usb_driver btusb_driver = {
+	.name		= "rtk_btusb",
+	.probe		= btusb_probe,
+	.disconnect	= btusb_disconnect,
+#ifdef CONFIG_PM
+	.suspend	= btusb_suspend,
+	.resume		= btusb_resume,
+#endif
+#if CONFIG_RESET_RESUME
+	.reset_resume	= btusb_resume,
+#endif
+	.id_table	= btusb_table,
+	.supports_autosuspend = 1,
+#if LINUX_VERSION_CODE > KERNEL_VERSION(3, 7, 1)
+	.disable_hub_initiated_lpm = 1,
+#endif
+};
+
+static int __init btusb_init(void)
+{
+	int err;
+	wifi_power_ctrl(1);//added by rubbit
+	RTKBT_INFO("Realtek Bluetooth USB driver module init, version %s", VERSION);
+#if CONFIG_BLUEDROID
+	err = btchr_init();
+	if (err < 0) {
+		/* usb register will go on, even bt char register failed */
+		RTKBT_ERR("Failed to register usb char device interfaces");
+	} else
+		bt_char_dev_registered = 1;
+#endif
+	err = usb_register(&btusb_driver);
+	if (err < 0)
+		RTKBT_ERR("Failed to register RTK bluetooth USB driver");
+	return err;
+}
+
+static void __exit btusb_exit(void)
+{
+	RTKBT_INFO("Realtek Bluetooth USB driver module exit");
+#if CONFIG_BLUEDROID
+	if (bt_char_dev_registered > 0)
+		btchr_exit();
+#endif
+	usb_deregister(&btusb_driver);
+	wifi_power_ctrl(0);//added by rubbit
+}
+
+module_init(btusb_init);
+module_exit(btusb_exit);
+
+MODULE_AUTHOR("Realtek Corporation");
+MODULE_DESCRIPTION("Realtek Bluetooth USB driver version");
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");