コード例 #1
0
ファイル: multipdp.c プロジェクト: mb-14/gt-s7500_kernel
static void cplog_work_func(struct work_struct *work)
{
	struct pdp_info *dev = pdp_get_serdev("ttyCPLOG");
	struct sk_buff *skb;
	int ret = 0;
	int reschedule = 0;

	if (fp_vsCPLOG > 0) {
		while ((skb = skb_dequeue(&cplog_sk_buf_rx_q))) {
			ret = multipdp_tty_insert_data(dev->vs_dev.tty,
					skb->data, skb->len);
			if (ret == 0) {
				skb_queue_head(&cplog_sk_buf_rx_q, skb);
				reschedule = 1;
				pr_err("[MULTIPDP] insert_data_size is ZERO!!\n");
				break;
			} else if (ret != skb->len) {
				skb_pull(skb, ret);
				skb_queue_head(&cplog_sk_buf_rx_q, skb);
				tty_flip_buffer_push(dev->vs_dev.tty);
				break;
			} else {
				tty_flip_buffer_push(dev->vs_dev.tty);
				dev_kfree_skb_any(skb);
			}
		}
		if (reschedule == 1)
			queue_work(cplog_rx_wq, &cplog_work);
	} else {
		/* Do Something */
		pr_err("[MULTIPDP] RIL didn't open CPLop node (ch.29)\n");
		return;
	}
}
コード例 #2
0
ファイル: multipdp.c プロジェクト: ARMP/samsung_kernel_cooper
static int multipdp_vs_read(struct pdp_info *dev, char *buf, size_t len)
{
	int ret = 0;

	if (!dev) {
		return 0;
	}
#ifndef	NO_TTY_RX_BUFF
	if(len > 1500) {
#else
	if(len > MAX_RX_BUFF_LEN) {
#endif
		unsigned char *prx_buf = kzalloc(len, GFP_ATOMIC);

		if(prx_buf == NULL)
			return 0;

	    memcpy(prx_buf, buf, len);
	    ret = len;

		if(ret != len)
			return ret;
		
		if(dev->vs_dev.tty == NULL)
			printk(">>>>> TTY is NULL : (1)~ !!!! \n");

		if (ret > 0 && dev->vs_dev.tty != NULL) {
			ret = multipdp_tty_insert_data(dev->vs_dev.tty, prx_buf, ret);
			if( ret > 0 )
				tty_flip_buffer_push(dev->vs_dev.tty);
		}
		printk("RF cal data read.(1) len: %d ret: %d\n", len, ret);
		kfree(prx_buf);
	}
	else {

		/* pdp data length.. */
	    memcpy(pdp_rx_buf, buf, len);
	    ret = len;
		if (ret != len) {
			return ret;
		}

#ifdef LOOP_BACK_TEST
		if (dev->id == LOOP_BACK_CHANNEL) {
			// compare and resend , update stastic data
			//printk("receive loopback packet[%d]\n",loopback_res.nTransfered);
			//printk("read data : %x %x %x %x %x %x\n",pdp_rx_buf[0],pdp_rx_buf[1],pdp_rx_buf[2],pdp_rx_buf[3],pdp_rx_buf[4],pdp_rx_buf[5]);
			//printk("write data : %x %x %x %x %x %x\n",loopback_data[0],loopback_data[1],loopback_data[2],loopback_data[3],loopback_data[4],loopback_data[5]);
			if (loopback_ongoing) {
				if (strncmp(pdp_rx_buf, loopback_data, loopback_res.nPacketDataSize)){
					//printk("receive packet is not identical to that sent\n");
				}
				else {
					send_loop_back_packet(loopback_data, loopback_res.nPacketDataSize);
				}
			}
			else {
				//do nothing
				//printk("loopback channel has gotten data, but test is no ongoing\n");
			}
			
		}
		else if (ret > 0 && dev->vs_dev.tty != NULL) {
			tty_insert_flip_string(dev->vs_dev.tty, pdp_rx_buf, ret);
			tty_flip_buffer_push(dev->vs_dev.tty);
		}
#else
		if(dev->vs_dev.tty == NULL)
			printk(">>>>> TTY is NULL : (2)~ !!!! \n");
		
		if (ret > 0 && dev->vs_dev.tty != NULL) {
	#if 1
			ret = multipdp_tty_insert_data(dev->vs_dev.tty, pdp_rx_buf, ret);
	#else			
			ret = tty_insert_flip_string(dev->vs_dev.tty, pdp_rx_buf, ret);
	#endif
			if( ret > 0 )
				tty_flip_buffer_push(dev->vs_dev.tty);
		}
		//printk("RF cal data read.(2) len: %d ret: %d\n", len, ret);
#endif		
	}
	//printk("multipdp_vs_read : len = %d\n", ret);
	return ret;
}
////////////
#endif

static int vs_read(struct pdp_info *dev, size_t len)
{
	int retval = 0;
	u32 size;
	u32 copied_size;
	int insert_size = 0;

	if (dev) {
		/* pdp data length. */

		if (len > MAX_PDP_DATA_LEN) {	// RF cal data?

            DPRINTK(1, "CAL DATA\n");
            size = dpram_read(dpram_filp, prx_buf, len);
            DPRINTK(1, "multipdp_thread request read size : %d readed size %d, count : %d\n",len ,size,count);

            if ((dev->id == 1 && !fp_vsCSD) || (dev->id == 5 && !fp_vsGPS) || (dev->id == 8 && !fp_vsEFS)|| (dev->id == 25 && !fp_vsSMD)){
                EPRINTK("vs_read : %s, discard data.\n", dev->vs_dev.tty->name);
            }
            else {
                while (size) {
        			copied_size = (size > MAX_PDP_DATA_LEN) ? MAX_PDP_DATA_LEN : size;
        			if (size > 0 && dev->vs_dev.tty != NULL) 
        				insert_size = tty_insert_flip_string(dev->vs_dev.tty, prx_buf+retval, copied_size);
                    if (insert_size != copied_size) {
                        EPRINTK("flip buffer full : %s, insert size : %d, real size : %d\n",dev->vs_dev.tty->name,copied_size,insert_size);
                        return -1; 
                    }
        			size = size - copied_size;
        			retval += copied_size;
	}
                DPRINTK(1, "retval : %d\n",retval);
    		    tty_flip_buffer_push(dev->vs_dev.tty);
                count++;
            }
		}

		else {
			retval = dpram_read(dpram_filp, pdp_rx_buf, len);

			if (retval != len)
				return retval;

            if(retval > 0){
                if((dev->id == 1 && !fp_vsCSD) || (dev->id == 5 && !fp_vsGPS) || (dev->id == 8 && !fp_vsEFS)|| (dev->id == 25 && !fp_vsSMD)) {
        			EPRINTK("vs_read : %s, discard data.\n", dev->vs_dev.tty->name);
        		}
        		else {
        			insert_size = tty_insert_flip_string(dev->vs_dev.tty, pdp_rx_buf, retval);
                    if (insert_size != retval) {
                        EPRINTK("flip buffer full : %s, insert size : %d, real size : %d\n",dev->vs_dev.tty->name,retval,insert_size);
                        return -1; 
                    }
		tty_flip_buffer_push(dev->vs_dev.tty);
	}
            }
		}
	}

	return 0;
}
コード例 #3
0
static int multipdp_vs_read(struct pdp_info *dev, char *buf, size_t len)
{
	int ret = 0;

	if (!dev) {
		return 0;
	}
#ifndef	NO_TTY_RX_BUFF
	if(len > 1500) {
#else
	if(len > MAX_RX_BUFF_LEN) {
#endif
		unsigned char *prx_buf = kzalloc(len, GFP_ATOMIC);

		if(prx_buf == NULL)
			return 0;

	    memcpy(prx_buf, buf, len);
	    ret = len;

		if(ret != len)
			return ret;
		
		if(dev->vs_dev.tty == NULL)
			printk(">>>>> TTY is NULL : (1)~ !!!! \n");

		if (ret > 0 && dev->vs_dev.tty != NULL) {
			ret = multipdp_tty_insert_data(dev->vs_dev.tty, prx_buf, ret);
			if( ret > 0 )
				tty_flip_buffer_push(dev->vs_dev.tty);
		}
		printk("RF cal data read.(1) len: %d ret: %d\n", len, ret);
		kfree(prx_buf);
	}
	else {

		/* pdp data length.. */
	    memcpy(pdp_rx_buf, buf, len);
	    ret = len;
		if (ret != len) {
			return ret;
		}

#ifdef LOOP_BACK_TEST
		if (dev->id == LOOP_BACK_CHANNEL) {
			// compare and resend , update stastic data
			//printk("receive loopback packet[%d]\n",loopback_res.nTransfered);
			//printk("read data : %x %x %x %x %x %x\n",pdp_rx_buf[0],pdp_rx_buf[1],pdp_rx_buf[2],pdp_rx_buf[3],pdp_rx_buf[4],pdp_rx_buf[5]);
			//printk("write data : %x %x %x %x %x %x\n",loopback_data[0],loopback_data[1],loopback_data[2],loopback_data[3],loopback_data[4],loopback_data[5]);
			if (loopback_ongoing) {
				if (strncmp(pdp_rx_buf, loopback_data, loopback_res.nPacketDataSize)){
					//printk("receive packet is not identical to that sent\n");
				}
				else {
					send_loop_back_packet(loopback_data, loopback_res.nPacketDataSize);
				}
			}
			else {
				//do nothing
				//printk("loopback channel has gotten data, but test is no ongoing\n");
			}
			
		}
		else if (ret > 0 && dev->vs_dev.tty != NULL) {
			tty_insert_flip_string(dev->vs_dev.tty, pdp_rx_buf, ret);
			tty_flip_buffer_push(dev->vs_dev.tty);
		}
#else
		if(dev->vs_dev.tty == NULL)
			printk(">>>>> TTY is NULL : (2)~ !!!! \n");
		
		if (ret > 0 && dev->vs_dev.tty != NULL) {
	#if 1
			ret = multipdp_tty_insert_data(dev->vs_dev.tty, pdp_rx_buf, ret);
	#else			
			ret = tty_insert_flip_string(dev->vs_dev.tty, pdp_rx_buf, ret);
	#endif
			if( ret > 0 )
				tty_flip_buffer_push(dev->vs_dev.tty);
		}
		//printk("RF cal data read.(2) len: %d ret: %d\n", len, ret);
#endif		
	}
	//printk("multipdp_vs_read : len = %d\n", ret);
	return ret;
}
////////////
#endif

static int vs_read(struct pdp_info *dev, size_t len)
{
	int retval = 0;
	u32 size;
	u32 copied_size;
	int insert_size = 0;

	if (dev) {
		/* pdp data length. */

		if (len > MAX_PDP_DATA_LEN) {	// RF cal data?

            DPRINTK(1, "CAL DATA\n");
            size = dpram_read(dpram_filp, prx_buf, len);
            DPRINTK(1, "multipdp_thread request read size : %d readed size %d, count : %d\n",len ,size,count);

#ifdef CONFIG_ENABLE_TTY_CIQ
            if ((dev->id == 26 && !fp_vsCIQ0) ||(dev->id == 9 && !fp_vsCIQ1)||(dev->id == 1 && !fp_vsCSD) || (dev->id == 5 && !fp_vsGPS) || (dev->id == 8 && !fp_vsEFS)|| (dev->id == 25 && !fp_vsSMD)){
#else
            if ((dev->id == 1 && !fp_vsCSD) || (dev->id == 5 && !fp_vsGPS) || (dev->id == 8 && !fp_vsEFS)|| (dev->id == 25 && !fp_vsSMD)){
#endif
                EPRINTK("vs_read : %s, discard data.\n", dev->vs_dev.tty->name);
            }
            else {
                while (size) {
        			copied_size = (size > MAX_PDP_DATA_LEN) ? MAX_PDP_DATA_LEN : size;
        			if (size > 0 && dev->vs_dev.tty != NULL) 
        				insert_size = tty_insert_flip_string(dev->vs_dev.tty, prx_buf+retval, copied_size);
                    if (insert_size != copied_size) {
                        EPRINTK("flip buffer full : %s, insert size : %d, real size : %d\n",dev->vs_dev.tty->name,copied_size,insert_size);
                        return -1; 
                    }
        			size = size - copied_size;
        			retval += copied_size;
	}
                DPRINTK(1, "retval : %d\n",retval);
    		    tty_flip_buffer_push(dev->vs_dev.tty);
                count++;
            }
		}

		else {
			retval = dpram_read(dpram_filp, pdp_rx_buf, len);

			if (retval != len)
				return retval;

            if(retval > 0){
#ifdef CONFIG_ENABLE_TTY_CIQ
                if((dev->id == 26 && !fp_vsCIQ0) ||(dev->id == 9 && !fp_vsCIQ1) ||( dev->id == 1 && !fp_vsCSD) || (dev->id == 5 && !fp_vsGPS) || (dev->id == 8 && !fp_vsEFS)|| (dev->id == 25 && !fp_vsSMD)) {
#else
                if((dev->id == 1 && !fp_vsCSD) || (dev->id == 5 && !fp_vsGPS) || (dev->id == 8 && !fp_vsEFS)|| (dev->id == 25 && !fp_vsSMD)) {
#endif
        			EPRINTK("vs_read : %s, discard data.\n", dev->vs_dev.tty->name);
        		}
        		else {
        			insert_size = tty_insert_flip_string(dev->vs_dev.tty, pdp_rx_buf, retval);
                    if (insert_size != retval) {
                        EPRINTK("flip buffer full : %s, insert size : %d, real size : %d\n",dev->vs_dev.tty->name,retval,insert_size);
                        return -1; 
                    }
		tty_flip_buffer_push(dev->vs_dev.tty);
	}
            }
		}
	}

	return 0;
}
static int vs_ioctl(struct tty_struct *tty, unsigned int cmd,
			unsigned long arg)
{
	return -ENOIOCTLCMD;
}

#if 0
static void vs_break_ctl(struct tty_struct *tty, int break_state)
{
}
#endif

static struct tty_operations multipdp_tty_ops = {
	.open 		= vs_open,
	.close 		= vs_close,
	.write 		= vs_write,
	.write_room = vs_write_room,
	.ioctl 		= vs_ioctl,
	.chars_in_buffer = vs_chars_in_buffer,
	/* TODO: add more operations */
};

static int vs_add_dev(struct pdp_info *dev)
{
	struct tty_driver *tty_driver;

	tty_driver = get_tty_driver_by_id(dev);

    kref_init(&tty_driver->kref);

	tty_driver->magic	= TTY_DRIVER_MAGIC;
	tty_driver->driver_name	= "multipdp";
	tty_driver->name	= dev->vs_dev.tty_name;
	tty_driver->major	= CSD_MAJOR_NUM;
	tty_driver->minor_start = get_minor_start_index(dev->id);
	tty_driver->num		= 1;
	tty_driver->type	= TTY_DRIVER_TYPE_SERIAL;
	tty_driver->subtype	= SERIAL_TYPE_NORMAL;
	tty_driver->flags	= TTY_DRIVER_REAL_RAW;
	// tty_driver->refcount	= dev->vs_dev.refcount;
	tty_driver->ttys	= dev->vs_dev.tty_table; // 2.6 kernel porting
	tty_driver->termios	= dev->vs_dev.termios;
	tty_driver->termios_locked	= dev->vs_dev.termios_locked;

	tty_set_operations(tty_driver, &multipdp_tty_ops);
	return tty_register_driver(tty_driver);
}

static void vs_del_dev(struct pdp_info *dev)
{
	struct tty_driver *tty_driver = NULL;

	tty_driver = get_tty_driver_by_id(dev);
	tty_unregister_driver(tty_driver);
	return;
}

/*
 * PDP context and mux/demux functions
 */

static inline struct pdp_info * pdp_get_dev(u8 id)
{
	int slot;

	for (slot = 0; slot < MAX_PDP_CONTEXT; slot++) {
		if (pdp_table[slot] && pdp_table[slot]->id == id) {
			return pdp_table[slot];
		}
	}
	return NULL;
}

static inline struct pdp_info * pdp_get_serdev(const char *name)
{
	int slot;
	struct pdp_info *dev;

	for (slot = 0; slot < MAX_PDP_CONTEXT; slot++) {
		dev = pdp_table[slot];
		if (dev && dev->type == DEV_TYPE_SERIAL &&
		    strcmp(name, dev->vs_dev.tty_name) == 0) {
			return dev;
		}
	}
	return NULL;
}
コード例 #4
0
ファイル: multipdp.c プロジェクト: AustinBleax/Bali_SK4G
static int multipdp_vs_read(struct pdp_info *dev, char *buf, size_t len)
{
	int ret = 0;

	if (!dev) {
		return 0;
	}

#ifndef	NO_TTY_RX_BUFF
	if(len > 1500) {
#else
	if(len > MAX_RX_BUFF_LEN) {
#endif
		unsigned char *prx_buf = kzalloc(len, GFP_ATOMIC);
		//unsigned char *prx_buf = kzalloc(len, GFP_NOIO);

		if(prx_buf == NULL)
			return 0;

	    memcpy(prx_buf, buf, len);
	    ret = len;

		if(ret != len)
			return ret;
		
		if(dev->vs_dev.tty == NULL)
			printk(">>>>> TTY is NULL : (1)~ !!!! \n");

		if (ret > 0 && dev->vs_dev.tty != NULL) {
			ret = multipdp_tty_insert_data(dev->vs_dev.tty, prx_buf, ret);
			if( ret > 0 )
				tty_flip_buffer_push(dev->vs_dev.tty);
		}
		printk("RF cal data read.(1) len: %d ret: %d\n", len, ret);
		kfree(prx_buf);
	}
	else {

		/* pdp data length.. */
	    memcpy(pdp_rx_buf, buf, len);
	    ret = len;
		if (ret != len) {
			return ret;
		}

#ifdef LOOP_BACK_TEST
		if (dev->id == LOOP_BACK_CHANNEL) {
			// compare and resend , update stastic data
			//printk("receive loopback packet[%d]\n",loopback_res.nTransfered);
			//printk("read data : %x %x %x %x %x %x\n",pdp_rx_buf[0],pdp_rx_buf[1],pdp_rx_buf[2],pdp_rx_buf[3],pdp_rx_buf[4],pdp_rx_buf[5]);
			//printk("write data : %x %x %x %x %x %x\n",loopback_data[0],loopback_data[1],loopback_data[2],loopback_data[3],loopback_data[4],loopback_data[5]);
			if (loopback_ongoing) {
				if (strncmp(pdp_rx_buf, loopback_data, loopback_res.nPacketDataSize)){
					//printk("receive packet is not identical to that sent\n");
				}
				else {
					send_loop_back_packet(loopback_data, loopback_res.nPacketDataSize);
				}
			}
			else {
				//do nothing
				//printk("loopback channel has gotten data, but test is no ongoing\n");
			}
			
		}
		else if (ret > 0 && dev->vs_dev.tty != NULL) {
			tty_insert_flip_string(dev->vs_dev.tty, pdp_rx_buf, ret);
			tty_flip_buffer_push(dev->vs_dev.tty);
		}
#else
		if(dev->vs_dev.tty == NULL)
			printk(">>>>> TTY is NULL : (2)~ !!!! \n");
		
		if (ret > 0 && dev->vs_dev.tty != NULL) {
	#if 1
			ret = multipdp_tty_insert_data(dev->vs_dev.tty, pdp_rx_buf, ret);
	#else			
			ret = tty_insert_flip_string(dev->vs_dev.tty, pdp_rx_buf, ret);
	#endif
			if( ret > 0 )
				tty_flip_buffer_push(dev->vs_dev.tty);
		}
		//printk("RF cal data read.(2) len: %d ret: %d\n", len, ret);
#endif		
	}
	//printk("multipdp_vs_read : len = %d\n", ret);
	return ret;
}
////////////
#endif
static int vs_read(struct pdp_info *dev, size_t len)
{
	int ret = 0;

	if (!dev) {
		return 0;
	}

	if(len > 1500) {
		unsigned char *prx_buf = kzalloc(len, GFP_ATOMIC);

		if(prx_buf == NULL)
			return 0;

		ret = dpram_read(dpram_filp, prx_buf, len);

		if(ret != len){
            kfree(prx_buf);
			return ret;
        }
		if (dev->vs_dev.tty == NULL) 
			printk("vs_read : #1 vs_dev.tty is NULL =====\n");
		if (ret > 0 && dev->vs_dev.tty != NULL) {
			ret = tty_insert_flip_string(dev->vs_dev.tty, prx_buf, ret);
			tty_flip_buffer_push(dev->vs_dev.tty);
		}
		printk("RF cal data read. len: %d ret: %d\n", len, ret);
		kfree(prx_buf);
	}
	else {

		/* pdp data length.. */
		ret = dpram_read(dpram_filp, pdp_rx_buf, len);
		if (ret != len) {
			return ret;
		}

#ifdef LOOP_BACK_TEST
		if (dev->id == LOOP_BACK_CHANNEL) {
			// compare and resend , update stastic data
			//printk("receive loopback packet[%d]\n",loopback_res.nTransfered);
			//printk("read data : %x %x %x %x %x %x\n",pdp_rx_buf[0],pdp_rx_buf[1],pdp_rx_buf[2],pdp_rx_buf[3],pdp_rx_buf[4],pdp_rx_buf[5]);
			//printk("write data : %x %x %x %x %x %x\n",loopback_data[0],loopback_data[1],loopback_data[2],loopback_data[3],loopback_data[4],loopback_data[5]);
			if (loopback_ongoing) {
				if (strncmp(pdp_rx_buf, loopback_data, loopback_res.nPacketDataSize)){
					//printk("receive packet is not identical to that sent\n");
				}
				else {
					send_loop_back_packet(loopback_data, loopback_res.nPacketDataSize);
				}
			}
			else {
				//do nothing
				//printk("loopback channel has gotten data, but test is no ongoing\n");
			}
			
		}
		else if (ret > 0 && dev->vs_dev.tty != NULL) {	//hobac.
			tty_insert_flip_string(dev->vs_dev.tty, pdp_rx_buf, ret);
			tty_flip_buffer_push(dev->vs_dev.tty);
		}
#else
		if (dev->vs_dev.tty == NULL) 
			printk("vs_read : #2 vs_dev.tty is NULL =====\n");
		if (ret > 0 && dev->vs_dev.tty != NULL) {	//hobac.
			tty_insert_flip_string(dev->vs_dev.tty, pdp_rx_buf, ret);
			tty_flip_buffer_push(dev->vs_dev.tty);
		}
#endif		
	}
	return 0;
}
コード例 #5
0
ファイル: multipdp.c プロジェクト: mb-14/gt-s7500_kernel
static int multipdp_vs_read(struct pdp_info *dev, char *buf, size_t len)
{
	int ret = -1;
	struct sk_buff *skb;

	if (!dev) {
		pr_err("[MULTIPDP] dev is null!\n");
		return 0;
	}
#ifndef	NO_TTY_RX_BUFF
	if (len > 1500) {
#else
	if (len > MAX_RX_BUFF_LEN) {
#endif
		unsigned char *prx_buf = kzalloc(len, GFP_ATOMIC);

		if (prx_buf == NULL) {
			pr_err("[MULTIPDP] prx_buf is null!\n");
			return 0;
		}

		memcpy(prx_buf, buf, len);
		ret = len;

		if (ret != len) {
			pr_err("[MULTIPDP] ret != len!\n");
			return ret;
		}

		if (dev->vs_dev.tty == NULL || (dev->id == 1 && !fp_vsCSD)
		    || (dev->id == 5 && !fp_vsGPS) || (dev->id == 8
						       && !fp_vsEFS)
		    || (dev->id == 25 && !fp_vsSMD)
		    || (dev->id == 6 && !fp_vsEXGPS) || (dev->id == 29
							 && !fp_vsCPLOG)
		    || (dev->id == 31 && !fp_vsLOOPBACK)) {
			pr_err("[MULTIPDP] TTY is NULL : (1)~ !!!!\n");
			return 0;
		}

		if (ret > 0 && dev->vs_dev.tty != NULL) {
			if (dev->id == 29) {
				skb = alloc_skb(len, GFP_ATOMIC);
				if (unlikely(!skb))
					pr_err("[MULTIPDP] sk_buff alloc failed!\n");

				memcpy(skb_put(skb, len), prx_buf, len);
				skb_queue_tail(&cplog_sk_buf_rx_q, skb);
				queue_work(cplog_rx_wq, &cplog_work);
			} else {
				ret = multipdp_tty_insert_data(
						dev->vs_dev.tty, prx_buf, ret);
				if (ret > 0) {
					dev->vs_dev.tty->low_latency = 0;
					tty_flip_buffer_push(dev->vs_dev.tty);
				}
			}
		}
		kfree(prx_buf);
	} else {
		/* pdp data length.. */
		memcpy(pdp_rx_buf, buf, len);

		ret = len;
		if (ret != len) {
			pr_err("[MULTIPDP] ret != len!\n");
			return ret;
		}
#ifdef LOOP_BACK_TEST
		if (dev->id == LOOP_BACK_CHANNEL) {
			if (loopback_ongoing) {
				if (strncmp(pdp_rx_buf,
							loopback_data,
							loopback_res.
							nPacketDataSize)) {
					/* DO SOMETHING */
				} else {
					send_loop_back_packet(
							loopback_data,
							loopback_res.
							nPacketDataSize);
				}
			} else {
				/* DO SOMETHING */
			}
		} else if (ret > 0 && dev->vs_dev.tty != NULL) {
			tty_insert_flip_string(
					dev->vs_dev.tty,
					pdp_rx_buf, ret);
			dev->vs_dev.tty->low_latency = 0;
			tty_flip_buffer_push(dev->vs_dev.tty);
		}
#else
		if (dev->vs_dev.tty == NULL)
			pr_err("[MULTIPDP] TTY is NULL : (2)~ !!!!\n");

		if (ret > 0 && dev->vs_dev.tty != NULL) {
			if (dev->id == 29) {
				skb = alloc_skb(len, GFP_ATOMIC);

				if (unlikely(!skb))
					pr_err("[MULTIPDP] Allocation sk_buff error!\n");

				memcpy(skb_put(skb, len), pdp_rx_buf, len);
				skb_queue_tail(&cplog_sk_buf_rx_q, skb);
				queue_work(cplog_rx_wq, &cplog_work);
			} else {
				ret = multipdp_tty_insert_data(
						dev->vs_dev.tty,
						pdp_rx_buf, ret);
				if (ret > 0) {
					dev->vs_dev.tty->low_latency = 0;
					tty_flip_buffer_push(dev->vs_dev.tty);
				}
			}
		}
#endif
	}
	return ret;
}
#endif

static int vs_read(struct pdp_info *dev, size_t len)
{
	int retval = 0;
	u32 size;
	u32 copied_size;
	int insert_size = 0;

	if (dev) {
		/* pdp data length. */

		if (len > MAX_PDP_DATA_LEN) {

			DPRINTK(2, "CAL DATA\n");
			size = dpram_read(dpram_filp, prx_buf, len);
			DPRINTK(2,
				"multipdp_thread request read size : %d readed size %d, count : %d\n",
				len, size, count);

			if ((dev->id == 1 && !fp_vsCSD)
			    || (dev->id == 5 && !fp_vsGPS) || (dev->id == 8
							       && !fp_vsEFS)
			    || (dev->id == 25 && !fp_vsSMD)
			    || (dev->id == 6 && !fp_vsEXGPS) || (dev->id == 29
								 && !fp_vsCPLOG)
			    || (dev->id == 31 && !fp_vsLOOPBACK)) {
				pr_err("[MULTIPDP] %s, discard data.\n",
					dev->vs_dev.tty->name);
			} else {
				while (size) {
					copied_size = (size >
							MAX_PDP_DATA_LEN) ?
						MAX_PDP_DATA_LEN : size;

					if (size > 0
						&& dev->vs_dev.tty != NULL) {
						insert_size =
							tty_insert_flip_string
							(dev->vs_dev.tty,
							 prx_buf + retval,
							 copied_size);
					}

					if (insert_size != copied_size) {
						pr_err("[MULTIPDP] flip buffer full : %s,"
								"insert size : %d,"
								"real size : %d\n",
								dev->vs_dev.
								tty->name,
								copied_size,
								insert_size);
						return -ERANGE;
					}
					size = size - copied_size;
					retval += copied_size;
				}

				DPRINTK(2, "retval : %d\n", retval);
				tty_flip_buffer_push(dev->vs_dev.tty);
				count++;
			}
		} else {
			retval = dpram_read(dpram_filp, pdp_rx_buf, len);

			if (retval != len)
				return retval;

			if (retval > 0) {
				if ((dev->id == 1 && !fp_vsCSD)
				    || (dev->id == 5 && !fp_vsGPS)
				    || (dev->id == 8 && !fp_vsEFS)
				    || (dev->id == 25 && !fp_vsSMD)
				    || (dev->id == 6 && !fp_vsEXGPS)
				    || (dev->id == 29 && !fp_vsCPLOG)
				    || (dev->id == 31 && !fp_vsLOOPBACK)) {
					pr_err("[MULTIPDP] %s, discard data.\n",
						dev->vs_dev.tty->name);
				} else {
					insert_size =
					    tty_insert_flip_string(dev->
								   vs_dev.tty,
								   pdp_rx_buf,
								   retval);

					if (insert_size != retval) {
						pr_err("[MULTIPDP] flip buffer full : %s,"
								"insert size : %d,"
								"real size : %d\n",
								dev->vs_dev.
								tty->name,
								retval,
								insert_size);
						return -ERANGE;
					}

					tty_flip_buffer_push(dev->vs_dev.tty);
				}
			}
		}
	}

	return 0;
}