drivers/staging/ft1000/ft1000-usb/ft1000_debug.c

/*
 *---------------------------------------------------------------------------
 * FT1000 driver for Flarion Flash OFDM NIC Device
 *
 * Copyright (C) 2006 Flarion Technologies, All rights reserved.
 *
 * 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.
 *---------------------------------------------------------------------------
 *
 * File:         ft1000_chdev.c
 *
 * Description:  Custom character device dispatch routines.
 *
 * History:
 * 8/29/02    Whc                Ported to Linux.
 * 6/05/06    Whc                Porting to Linux 2.6.9
 *
 *---------------------------------------------------------------------------
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/poll.h>
#include <linux/netdevice.h>
#include <linux/delay.h>

#include <linux/ioctl.h>
#include <linux/debugfs.h>
#include "ft1000_usb.h"

static int ft1000_flarion_cnt;

static int ft1000_open(struct inode *inode, struct file *file);
static unsigned int ft1000_poll_dev(struct file *file, poll_table *wait);
static long ft1000_ioctl(struct file *file, unsigned int command,
			 unsigned long argument);
static int ft1000_release(struct inode *inode, struct file *file);

/* List to free receive command buffer pool */
struct list_head freercvpool;

/* lock to arbitrate free buffer list for receive command data */
spinlock_t free_buff_lock;

int numofmsgbuf = 0;

/*
 * Table of entry-point routines for char device
 */
static const struct file_operations ft1000fops = {
	.unlocked_ioctl	= ft1000_ioctl,
	.poll		= ft1000_poll_dev,
	.open		= ft1000_open,
	.release	= ft1000_release,
	.llseek		= no_llseek,
};

/*
  ---------------------------------------------------------------------------
  * Function:    ft1000_get_buffer
  *
  * Parameters:
  *
  * Returns:
  *
  * Description:
  *
  * Notes:
  *
  *---------------------------------------------------------------------------
  */
struct dpram_blk *ft1000_get_buffer(struct list_head *bufflist)
{
	unsigned long flags;
	struct dpram_blk *ptr;

	spin_lock_irqsave(&free_buff_lock, flags);
	/* Check if buffer is available */
	if (list_empty(bufflist)) {
		pr_debug("No more buffer - %d\n", numofmsgbuf);
		ptr = NULL;
	} else {
		numofmsgbuf--;
		ptr = list_entry(bufflist->next, struct dpram_blk, list);
		list_del(&ptr->list);
		/* pr_debug("number of free msg buffers = %d\n", numofmsgbuf); */
	}
	spin_unlock_irqrestore(&free_buff_lock, flags);

	return ptr;
}




/*
 *---------------------------------------------------------------------------
 * Function:    ft1000_free_buffer
 *
 * Parameters:
 *
 * Returns:
 *
 * Description:
 *
 * Notes:
 *
 *---------------------------------------------------------------------------
 */
void ft1000_free_buffer(struct dpram_blk *pdpram_blk, struct list_head *plist)
{
	unsigned long flags;

	spin_lock_irqsave(&free_buff_lock, flags);
	/* Put memory back to list */
	list_add_tail(&pdpram_blk->list, plist);
	numofmsgbuf++;
	/*pr_debug("number of free msg buffers = %d\n", numofmsgbuf); */
	spin_unlock_irqrestore(&free_buff_lock, flags);
}

/*
 *---------------------------------------------------------------------------
 * Function:    ft1000_CreateDevice
 *
 * Parameters:  dev - pointer to adapter object
 *
 * Returns:     0 if successful
 *
 * Description: Creates a private char device.
 *
 * Notes:       Only called by init_module().
 *
 *---------------------------------------------------------------------------
 */
int ft1000_create_dev(struct ft1000_usb *dev)
{
	int result;
	int i;
	struct dentry *dir, *file;
	struct ft1000_debug_dirs *tmp;

	/* make a new device name */
	sprintf(dev->DeviceName, "%s%d", "FT1000_", dev->CardNumber);

	pr_debug("number of instance = %d\n", ft1000_flarion_cnt);
	pr_debug("DeviceCreated = %x\n", dev->DeviceCreated);

	if (dev->DeviceCreated) {
		pr_debug("\"%s\" already registered\n", dev->DeviceName);
		return -EIO;
	}


	/* register the device */
	pr_debug("\"%s\" debugfs device registration\n", dev->DeviceName);

	tmp = kmalloc(sizeof(struct ft1000_debug_dirs), GFP_KERNEL);
	if (tmp == NULL) {
		result = -1;
		goto fail;
	}

	dir = debugfs_create_dir(dev->DeviceName, NULL);
	if (IS_ERR(dir)) {
		result = PTR_ERR(dir);
		goto debug_dir_fail;
	}

	file = debugfs_create_file("device", S_IRUGO | S_IWUSR, dir,
				   dev, &ft1000fops);
	if (IS_ERR(file)) {
		result = PTR_ERR(file);
		goto debug_file_fail;
	}

	tmp->dent = dir;
	tmp->file = file;
	tmp->int_number = dev->CardNumber;
	list_add(&tmp->list, &dev->nodes.list);

	pr_debug("registered debugfs directory \"%s\"\n", dev->DeviceName);

	/* initialize application information */
	dev->appcnt = 0;
	for (i = 0; i < MAX_NUM_APP; i++) {
		dev->app_info[i].nTxMsg = 0;
		dev->app_info[i].nRxMsg = 0;
		dev->app_info[i].nTxMsgReject = 0;
		dev->app_info[i].nRxMsgMiss = 0;
		dev->app_info[i].fileobject = NULL;
		dev->app_info[i].app_id = i+1;
		dev->app_info[i].DspBCMsgFlag = 0;
		dev->app_info[i].NumOfMsg = 0;
		init_waitqueue_head(&dev->app_info[i].wait_dpram_msg);
		INIT_LIST_HEAD(&dev->app_info[i].app_sqlist);
	}

	dev->DeviceCreated = TRUE;
	ft1000_flarion_cnt++;

	return 0;

debug_file_fail:
	debugfs_remove(dir);
debug_dir_fail:
	kfree(tmp);
fail:
	return result;
}

/*
 *---------------------------------------------------------------------------
 * Function:    ft1000_DestroyDeviceDEBUG
 *
 * Parameters:  dev - pointer to adapter object
 *
 * Description: Destroys a private char device.
 *
 * Notes:       Only called by cleanup_module().
 *
 *---------------------------------------------------------------------------
 */
void ft1000_destroy_dev(struct net_device *netdev)
{
	struct ft1000_info *info = netdev_priv(netdev);
	struct ft1000_usb *dev = info->priv;
	int i;
	struct dpram_blk *pdpram_blk;
	struct dpram_blk *ptr;
	struct list_head *pos, *q;
	struct ft1000_debug_dirs *dir;

	if (dev->DeviceCreated) {
		ft1000_flarion_cnt--;
		list_for_each_safe(pos, q, &dev->nodes.list) {
			dir = list_entry(pos, struct ft1000_debug_dirs, list);
			if (dir->int_number == dev->CardNumber) {
				debugfs_remove(dir->file);
				debugfs_remove(dir->dent);
				list_del(pos);
				kfree(dir);
			}
		}
		pr_debug("unregistered device \"%s\"\n", dev->DeviceName);

		/* Make sure we free any memory reserve for slow Queue */
		for (i = 0; i < MAX_NUM_APP; i++) {
			while (list_empty(&dev->app_info[i].app_sqlist) == 0) {
				pdpram_blk = list_entry(dev->app_info[i].app_sqlist.next, struct dpram_blk, list);
				list_del(&pdpram_blk->list);
				ft1000_free_buffer(pdpram_blk, &freercvpool);

			}
			wake_up_interruptible(&dev->app_info[i].wait_dpram_msg);
		}

		/* Remove buffer allocated for receive command data */
		if (ft1000_flarion_cnt == 0) {
			while (list_empty(&freercvpool) == 0) {
				ptr = list_entry(freercvpool.next, struct dpram_blk, list);
				list_del(&ptr->list);
				kfree(ptr->pbuffer);
				kfree(ptr);
			}
		}
		dev->DeviceCreated = FALSE;
	}


}

/*
 *---------------------------------------------------------------------------
 * Function:    ft1000_open
 *
 * Parameters:
 *
 * Description:
 *
 * Notes:
 *
 *---------------------------------------------------------------------------
 */
static int ft1000_open(struct inode *inode, struct file *file)
{
	struct ft1000_info *info;
	struct ft1000_usb *dev = (struct ft1000_usb *)inode->i_private;
	int i, num;

	num = MINOR(inode->i_rdev) & 0xf;
	pr_debug("minor number=%d\n", num);

	info = file->private_data = netdev_priv(dev->net);

	pr_debug("f_owner = %p number of application = %d\n",
		 &file->f_owner, dev->appcnt);

	/* Check if maximum number of application exceeded */
	if (dev->appcnt > MAX_NUM_APP) {
		pr_debug("Maximum number of application exceeded\n");
		return -EACCES;
	}

	/* Search for available application info block */
	for (i = 0; i < MAX_NUM_APP; i++) {
		if ((dev->app_info[i].fileobject == NULL))
			break;
	}

	/* Fail due to lack of application info block */
	if (i == MAX_NUM_APP) {
		pr_debug("Could not find an application info block\n");
		return -EACCES;
	}

	dev->appcnt++;
	dev->app_info[i].fileobject = &file->f_owner;
	dev->app_info[i].nTxMsg = 0;
	dev->app_info[i].nRxMsg = 0;
	dev->app_info[i].nTxMsgReject = 0;
	dev->app_info[i].nRxMsgMiss = 0;

	nonseekable_open(inode, file);
	return 0;
}


/*
 *---------------------------------------------------------------------------
 * Function:    ft1000_poll_dev
 *
 * Parameters:
 *
 * Description:
 *
 * Notes:
 *
 *---------------------------------------------------------------------------
 */

static unsigned int ft1000_poll_dev(struct file *file, poll_table *wait)
{
	struct net_device *netdev = file->private_data;
	struct ft1000_info *info = netdev_priv(netdev);
	struct ft1000_usb *dev = info->priv;
	int i;

	if (ft1000_flarion_cnt == 0) {
		pr_debug("called with ft1000_flarion_cnt value zero\n");
		return -EBADF;
	}

	/* Search for matching file object */
	for (i = 0; i < MAX_NUM_APP; i++) {
		if (dev->app_info[i].fileobject == &file->f_owner) {
			/* pr_debug("Message is for AppId = %d\n", dev->app_info[i].app_id); */
			break;
		}
	}

	/* Could not find application info block */
	if (i == MAX_NUM_APP) {
		pr_debug("Could not find application info block\n");
		return -EACCES;
	}

	if (list_empty(&dev->app_info[i].app_sqlist) == 0) {
		pr_debug("Message detected in slow queue\n");
		return(POLLIN | POLLRDNORM | POLLPRI);
	}

	poll_wait(file, &dev->app_info[i].wait_dpram_msg, wait);
	/* pr_debug("Polling for data from DSP\n"); */

	return 0;
}

/*
 *---------------------------------------------------------------------------
 * Function:    ft1000_ioctl
 *
 * Parameters:
 *
 * Description:
 *
 * Notes:
 *
 *---------------------------------------------------------------------------
 */
static long ft1000_ioctl(struct file *file, unsigned int command,
			 unsigned long argument)
{
	void __user *argp = (void __user *)argument;
	struct ft1000_info *info;
	struct ft1000_usb *ft1000dev;
	int result = 0;
	int cmd;
	int i;
	u16 tempword;
	unsigned long flags;
	struct timeval tv;
	struct IOCTL_GET_VER get_ver_data;
	struct IOCTL_GET_DSP_STAT get_stat_data;
	u8 ConnectionMsg[] = {0x00, 0x44, 0x10, 0x20, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x93, 0x64,
			      0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x0a,
			      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
			      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
			      0x00, 0x00, 0x02, 0x37, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x7f, 0x00,
			      0x00, 0x01, 0x00, 0x00};

	unsigned short ledStat = 0;
	unsigned short conStat = 0;

	if (ft1000_flarion_cnt == 0) {
		pr_debug("called with ft1000_flarion_cnt of zero\n");
		return -EBADF;
	}

	/* pr_debug("command = 0x%x argument = 0x%8x\n", command, (u32)argument); */

	info = file->private_data;
	ft1000dev = info->priv;
	cmd = _IOC_NR(command);
	/* pr_debug("cmd = 0x%x\n", cmd); */

	/* process the command */
	switch (cmd) {
	case IOCTL_REGISTER_CMD:
		pr_debug("IOCTL_FT1000_REGISTER called\n");
		result = get_user(tempword, (__u16 __user *)argp);
		if (result) {
			pr_debug("result = %d failed to get_user\n", result);
			break;
		}
		if (tempword == DSPBCMSGID) {
			/* Search for matching file object */
			for (i = 0; i < MAX_NUM_APP; i++) {
				if (ft1000dev->app_info[i].fileobject == &file->f_owner) {
					ft1000dev->app_info[i].DspBCMsgFlag = 1;
					pr_debug("Registered for broadcast messages\n");
					break;
				}
			}
		}
		break;

	case IOCTL_GET_VER_CMD:
		pr_debug("IOCTL_FT1000_GET_VER called\n");

		get_ver_data.drv_ver = FT1000_DRV_VER;

		if (copy_to_user(argp, &get_ver_data, sizeof(get_ver_data))) {
			pr_debug("copy fault occurred\n");
			result = -EFAULT;
			break;
		}

		pr_debug("driver version = 0x%x\n",
			 (unsigned int)get_ver_data.drv_ver);

		break;
	case IOCTL_CONNECT:
		/* Connect Message */
		pr_debug("IOCTL_FT1000_CONNECT\n");
		ConnectionMsg[79] = 0xfc;
		result = card_send_command(ft1000dev, ConnectionMsg, 0x4c);

		break;
	case IOCTL_DISCONNECT:
		/* Disconnect Message */
		pr_debug("IOCTL_FT1000_DISCONNECT\n");
		ConnectionMsg[79] = 0xfd;
		result = card_send_command(ft1000dev, ConnectionMsg, 0x4c);
		break;
	case IOCTL_GET_DSP_STAT_CMD:
		/* pr_debug("IOCTL_FT1000_GET_DSP_STAT\n"); */
		memset(&get_stat_data, 0, sizeof(get_stat_data));
		memcpy(get_stat_data.DspVer, info->DspVer, DSPVERSZ);
		memcpy(get_stat_data.HwSerNum, info->HwSerNum, HWSERNUMSZ);
		memcpy(get_stat_data.Sku, info->Sku, SKUSZ);
		memcpy(get_stat_data.eui64, info->eui64, EUISZ);

		if (info->ProgConStat != 0xFF) {
			ft1000_read_dpram16(ft1000dev, FT1000_MAG_DSP_LED, (u8 *)&ledStat, FT1000_MAG_DSP_LED_INDX);
			get_stat_data.LedStat = ntohs(ledStat);
			pr_debug("LedStat = 0x%x\n", get_stat_data.LedStat);
			ft1000_read_dpram16(ft1000dev, FT1000_MAG_DSP_CON_STATE, (u8 *)&conStat, FT1000_MAG_DSP_CON_STATE_INDX);
			get_stat_data.ConStat = ntohs(conStat);
			pr_debug("ConStat = 0x%x\n", get_stat_data.ConStat);
		} else {
			get_stat_data.ConStat = 0x0f;
		}


		get_stat_data.nTxPkts = info->stats.tx_packets;
		get_stat_data.nRxPkts = info->stats.rx_packets;
		get_stat_data.nTxBytes = info->stats.tx_bytes;
		get_stat_data.nRxBytes = info->stats.rx_bytes;
		do_gettimeofday(&tv);
		get_stat_data.ConTm = (u32)(tv.tv_sec - info->ConTm);
		pr_debug("Connection Time = %d\n", (int)get_stat_data.ConTm);
		if (copy_to_user(argp, &get_stat_data, sizeof(get_stat_data))) {
			pr_debug("copy fault occurred\n");
			result = -EFAULT;
			break;
		}
		pr_debug("GET_DSP_STAT succeed\n");
		break;
	case IOCTL_SET_DPRAM_CMD:
	{
		struct IOCTL_DPRAM_BLK *dpram_data = NULL;
		/* struct IOCTL_DPRAM_COMMAND dpram_command; */
		u16 qtype;
		u16 msgsz;
		struct pseudo_hdr *ppseudo_hdr;
		u16 *pmsg;
		u16 total_len;
		u16 app_index;
		u16 status;

		/* pr_debug("IOCTL_FT1000_SET_DPRAM called\n");*/


		if (ft1000_flarion_cnt == 0)
			return -EBADF;

		if (ft1000dev->DrvMsgPend)
			return -ENOTTY;

		if (ft1000dev->fProvComplete == 0)
			return -EACCES;

		ft1000dev->fAppMsgPend = true;

		if (info->CardReady) {

			/* pr_debug("try to SET_DPRAM\n"); */

			/* Get the length field to see how many bytes to copy */
			result = get_user(msgsz, (__u16 __user *)argp);
			if (result)
				break;
			msgsz = ntohs(msgsz);
			/* pr_debug("length of message = %d\n", msgsz); */

			if (msgsz > MAX_CMD_SQSIZE) {
				pr_debug("bad message length = %d\n", msgsz);
				result = -EINVAL;
				break;
			}

			result = -ENOMEM;
			dpram_data = kmalloc(msgsz + 2, GFP_KERNEL);
			if (!dpram_data)
				break;

			if (copy_from_user(dpram_data, argp, msgsz+2)) {
				pr_debug("copy fault occurred\n");
				result = -EFAULT;
			} else {
				/* Check if this message came from a registered application */
				for (i = 0; i < MAX_NUM_APP; i++) {
					if (ft1000dev->app_info[i].fileobject == &file->f_owner)
						break;
				}
				if (i == MAX_NUM_APP) {
					pr_debug("No matching application fileobject\n");
					result = -EINVAL;
					kfree(dpram_data);
					break;
				}
				app_index = i;

				/* Check message qtype type which is the lower byte within qos_class */
				qtype = ntohs(dpram_data->pseudohdr.qos_class) & 0xff;
				/* pr_debug("qtype = %d\n", qtype); */
				if (qtype) {
				} else {
					/* Put message into Slow Queue */
					/* Only put a message into the DPRAM if msg doorbell is available */
					status = ft1000_read_register(ft1000dev, &tempword, FT1000_REG_DOORBELL);
					/* pr_debug("READ REGISTER tempword=%x\n", tempword); */
					if (tempword & FT1000_DB_DPRAM_TX) {
						/* Suspend for 2ms and try again due to DSP doorbell busy */
						mdelay(2);
						status = ft1000_read_register(ft1000dev, &tempword, FT1000_REG_DOORBELL);
						if (tempword & FT1000_DB_DPRAM_TX) {
							/* Suspend for 1ms and try again due to DSP doorbell busy */
							mdelay(1);
							status = ft1000_read_register(ft1000dev, &tempword, FT1000_REG_DOORBELL);
							if (tempword & FT1000_DB_DPRAM_TX) {
								status = ft1000_read_register(ft1000dev, &tempword, FT1000_REG_DOORBELL);
								if (tempword & FT1000_DB_DPRAM_TX) {
									/* Suspend for 3ms and try again due to DSP doorbell busy */
									mdelay(3);
									status = ft1000_read_register(ft1000dev, &tempword, FT1000_REG_DOORBELL);
									if (tempword & FT1000_DB_DPRAM_TX) {
										pr_debug("Doorbell not available\n");
										result = -ENOTTY;
										kfree(dpram_data);
										break;
									}
								}
							}
						}
					}

					/*pr_debug("finished reading register\n"); */

					/* Make sure we are within the limits of the slow queue memory limitation */
					if ((msgsz < MAX_CMD_SQSIZE) && (msgsz > PSEUDOSZ)) {
						/* Need to put sequence number plus new checksum for message */
						pmsg = (u16 *)&dpram_data->pseudohdr;
						ppseudo_hdr = (struct pseudo_hdr *)pmsg;
						total_len = msgsz+2;
						if (total_len & 0x1)
							total_len++;

						/* Insert slow queue sequence number */
						ppseudo_hdr->seq_num = info->squeseqnum++;
						ppseudo_hdr->portsrc = ft1000dev->app_info[app_index].app_id;
						/* Calculate new checksum */
						ppseudo_hdr->checksum = *pmsg++;
						/* pr_debug("checksum = 0x%x\n", ppseudo_hdr->checksum); */
						for (i = 1; i < 7; i++) {
							ppseudo_hdr->checksum ^= *pmsg++;
							/* pr_debug("checksum = 0x%x\n", ppseudo_hdr->checksum); */
						}
						pmsg++;
						ppseudo_hdr = (struct pseudo_hdr *)pmsg;
						result = card_send_command(ft1000dev, dpram_data, total_len+2);


						ft1000dev->app_info[app_index].nTxMsg++;
					} else {
						result = -EINVAL;
					}
				}
			}
		} else {
			pr_debug("Card not ready take messages\n");
			result = -EACCES;
		}
		kfree(dpram_data);

	}
	break;
	case IOCTL_GET_DPRAM_CMD:
	{
		struct dpram_blk *pdpram_blk;
		struct IOCTL_DPRAM_BLK __user *pioctl_dpram;
		int msglen;

		/* pr_debug("IOCTL_FT1000_GET_DPRAM called\n"); */

		if (ft1000_flarion_cnt == 0)
			return -EBADF;

		/* Search for matching file object */
		for (i = 0; i < MAX_NUM_APP; i++) {
			if (ft1000dev->app_info[i].fileobject == &file->f_owner) {
				/*pr_debug("Message is for AppId = %d\n", ft1000dev->app_info[i].app_id); */
				break;
			}
		}

		/* Could not find application info block */
		if (i == MAX_NUM_APP) {
			pr_debug("Could not find application info block\n");
			result = -EBADF;
			break;
		}

		result = 0;
		pioctl_dpram = argp;
		if (list_empty(&ft1000dev->app_info[i].app_sqlist) == 0) {
			/* pr_debug("Message detected in slow queue\n"); */
			spin_lock_irqsave(&free_buff_lock, flags);
			pdpram_blk = list_entry(ft1000dev->app_info[i].app_sqlist.next, struct dpram_blk, list);
			list_del(&pdpram_blk->list);
			ft1000dev->app_info[i].NumOfMsg--;
			/* pr_debug("NumOfMsg for app %d = %d\n", i, ft1000dev->app_info[i].NumOfMsg); */
			spin_unlock_irqrestore(&free_buff_lock, flags);
			msglen = ntohs(*(u16 *)pdpram_blk->pbuffer) + PSEUDOSZ;
			result = get_user(msglen, &pioctl_dpram->total_len);
			if (result)
				break;
			msglen = htons(msglen);
			/* pr_debug("msg length = %x\n", msglen); */
			if (copy_to_user(&pioctl_dpram->pseudohdr, pdpram_blk->pbuffer, msglen)) {
				pr_debug("copy fault occurred\n");
				result = -EFAULT;
				break;
			}

			ft1000_free_buffer(pdpram_blk, &freercvpool);
			result = msglen;
		}
		/* pr_debug("IOCTL_FT1000_GET_DPRAM no message\n"); */
	}
	break;

	default:
		pr_debug("unknown command: 0x%x\n", command);
		result = -ENOTTY;
		break;
	}
	ft1000dev->fAppMsgPend = false;
	return result;
}

/*
 *---------------------------------------------------------------------------
 * Function:    ft1000_release
 *
 * Parameters:
 *
 * Description:
 *
 * Notes:
 *
 *---------------------------------------------------------------------------
 */
static int ft1000_release(struct inode *inode, struct file *file)
{
	struct ft1000_info *info;
	struct net_device *dev;
	struct ft1000_usb *ft1000dev;
	int i;
	struct dpram_blk *pdpram_blk;
	struct dpram_blk *tmp;

	dev = file->private_data;
	info = netdev_priv(dev);
	ft1000dev = info->priv;

	if (ft1000_flarion_cnt == 0) {
		ft1000dev->appcnt--;
		return -EBADF;
	}

	/* Search for matching file object */
	for (i = 0; i < MAX_NUM_APP; i++) {
		if (ft1000dev->app_info[i].fileobject == &file->f_owner) {
			/* pr_debug("Message is for AppId = %d\n", ft1000dev->app_info[i].app_id); */
			break;
		}
	}

	if (i == MAX_NUM_APP)
		return 0;

	list_for_each_entry_safe(pdpram_blk, tmp, &ft1000dev->app_info[i].app_sqlist, list) {
		pr_debug("Remove and free memory queue up on slow queue\n");
		list_del(&pdpram_blk->list);
		ft1000_free_buffer(pdpram_blk, &freercvpool);
	}

	/* initialize application information */
	ft1000dev->appcnt--;
	pr_debug("appcnt = %d\n", ft1000dev->appcnt);
	ft1000dev->app_info[i].fileobject = NULL;

	return 0;
}