add backported HSO driver

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11938 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 2917 insertions, 1 deletions

diff --git a/target/linux/generic-2.6/config-2.6.26 b/target/linux/generic-2.6/config-2.6.26
index 61809491b5..1e6951d72f 100644
--- a/target/linux/generic-2.6/config-2.6.26
+++ b/target/linux/generic-2.6/config-2.6.26
@@ -1166,7 +1166,8 @@ CONFIG_RAMFS=y
 # CONFIG_RELAY is not set
 # CONFIG_RESOURCES_64BIT is not set
 # CONFIG_RFD_FTL is not set
-# CONFIG_RFKILL is not set
+CONFIG_RFKILL=m
+# CONFIG_RFKILL_INPUT is not set
 # CONFIG_ROMFS_FS is not set
 # CONFIG_ROSE is not set
 CONFIG_RPCSEC_GSS_KRB5=m
diff --git a/target/linux/generic-2.6/patches-2.6.26/915-hso-backport.patch b/target/linux/generic-2.6/patches-2.6.26/915-hso-backport.patch
new file mode 100644
index 0000000000..34c2d94259
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.26/915-hso-backport.patch
@@ -0,0 +1,2915 @@
+From: Greg Kroah-Hartman <gregkh@suse.de>
+Date: Wed, 14 May 2008 04:57:12 +0000 (-0700)
+Subject: HSO: add option hso driver
+X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=72dc1c096c7051a48ab1dbb12f71976656b55eb5;hp=44f74c046961bd1f21b7d35baaa9165572d1e975
+
+HSO: add option hso driver
+
+This driver is for a number of different Option devices.  Originally
+written by Option and Andrew Bird, but cleaned up massivly for
+acceptance into mainline by me and others.
+
+Many thanks to the following for their help in cleaning up the driver by
+providing feedback and patches to it:
+	- Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+	- Oliver Neukum <oliver@neukum.org>
+	- Alan Cox <alan@lxorguk.ukuu.org.uk>
+	- Javier Marcet <javier@krausbeck.org>
+
+Cc: Andrew Bird <ajb@spheresystems.co.uk>
+Cc: Javier Marcet <javier@krausbeck.org>
+Cc: Filip Aben <f.aben@option.com>
+Cc: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+Cc: Oliver Neukum <oliver@neukum.org>
+Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
+---
+
+diff --git a/drivers/net/Makefile b/drivers/net/Makefile
+index c52738a..c96fe20 100644
+--- a/drivers/net/Makefile
++++ b/drivers/net/Makefile
+@@ -237,6 +237,7 @@ obj-$(CONFIG_USB_CATC)          += usb/
+ obj-$(CONFIG_USB_KAWETH)        += usb/
+ obj-$(CONFIG_USB_PEGASUS)       += usb/
+ obj-$(CONFIG_USB_RTL8150)       += usb/
++obj-$(CONFIG_USB_HSO)		+= usb/
+ obj-$(CONFIG_USB_USBNET)        += usb/
+ obj-$(CONFIG_USB_ZD1201)        += usb/
+ 
+diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
+index 0604f3f..68e198b 100644
+--- a/drivers/net/usb/Kconfig
++++ b/drivers/net/usb/Kconfig
+@@ -154,6 +154,16 @@ config USB_NET_AX8817X
+ 	  This driver creates an interface named "ethX", where X depends on
+ 	  what other networking devices you have in use.
+ 
++config USB_HSO
++	tristate "Option USB High Speed Mobile Devices"
++	depends on USB && RFKILL
++	default n
++	help
++	  Choose this option if you have an Option HSDPA/HSUPA card.
++	  These cards support downlink speeds of 7.2Mbps or greater.
++
++	  To compile this driver as a module, choose M here: the
++	  module will be called hso.
+ 
+ config USB_NET_CDCETHER
+ 	tristate "CDC Ethernet support (smart devices such as cable modems)"
+diff --git a/drivers/net/usb/Makefile b/drivers/net/usb/Makefile
+index 595a539..24800c1 100644
+--- a/drivers/net/usb/Makefile
++++ b/drivers/net/usb/Makefile
+@@ -6,6 +6,7 @@ obj-$(CONFIG_USB_CATC)		+= catc.o
+ obj-$(CONFIG_USB_KAWETH)	+= kaweth.o
+ obj-$(CONFIG_USB_PEGASUS)	+= pegasus.o
+ obj-$(CONFIG_USB_RTL8150)	+= rtl8150.o
++obj-$(CONFIG_USB_HSO)		+= hso.o
+ obj-$(CONFIG_USB_NET_AX8817X)	+= asix.o
+ obj-$(CONFIG_USB_NET_CDCETHER)	+= cdc_ether.o
+ obj-$(CONFIG_USB_NET_DM9601)	+= dm9601.o
+diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
+new file mode 100644
+index 0000000..031d07b
+--- /dev/null
++++ b/drivers/net/usb/hso.c
+@@ -0,0 +1,2836 @@
++/******************************************************************************
++ *
++ * Driver for Option High Speed Mobile Devices.
++ *
++ *  Copyright (C) 2008 Option International
++ *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
++ *  			<ajb@spheresystems.co.uk>
++ *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
++ *  Copyright (C) 2008 Novell, Inc.
++ *
++ *  This program is free software; you can redistribute it and/or modify
++ *  it under the terms of the GNU General Public License version 2 as
++ *  published by the Free Software Foundation.
++ *
++ *  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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
++ *  USA
++ *
++ *
++ *****************************************************************************/
++
++/******************************************************************************
++ *
++ * Description of the device:
++ *
++ * Interface 0:	Contains the IP network interface on the bulk end points.
++ *		The multiplexed serial ports are using the interrupt and
++ *		control endpoints.
++ *		Interrupt contains a bitmap telling which multiplexed
++ *		serialport needs servicing.
++ *
++ * Interface 1:	Diagnostics port, uses bulk only, do not submit urbs until the
++ *		port is opened, as this have a huge impact on the network port
++ *		throughput.
++ *
++ * Interface 2:	Standard modem interface - circuit switched interface, should
++ *		not be used.
++ *
++ *****************************************************************************/
++
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <linux/netdevice.h>
++#include <linux/module.h>
++#include <linux/ethtool.h>
++#include <linux/usb.h>
++#include <linux/timer.h>
++#include <linux/tty.h>
++#include <linux/tty_driver.h>
++#include <linux/tty_flip.h>
++#include <linux/kmod.h>
++#include <linux/rfkill.h>
++#include <linux/ip.h>
++#include <linux/uaccess.h>
++#include <linux/usb/cdc.h>
++#include <net/arp.h>
++#include <asm/byteorder.h>
++
++
++#define DRIVER_VERSION			"1.2"
++#define MOD_AUTHOR			"Option Wireless"
++#define MOD_DESCRIPTION			"USB High Speed Option driver"
++#define MOD_LICENSE			"GPL"
++
++#define HSO_MAX_NET_DEVICES		10
++#define HSO__MAX_MTU			2048
++#define DEFAULT_MTU			1500
++#define DEFAULT_MRU			1500
++
++#define CTRL_URB_RX_SIZE		1024
++#define CTRL_URB_TX_SIZE		64
++
++#define BULK_URB_RX_SIZE		4096
++#define BULK_URB_TX_SIZE		8192
++
++#define MUX_BULK_RX_BUF_SIZE		HSO__MAX_MTU
++#define MUX_BULK_TX_BUF_SIZE		HSO__MAX_MTU
++#define MUX_BULK_RX_BUF_COUNT		4
++#define USB_TYPE_OPTION_VENDOR		0x20
++
++/* These definitions are used with the struct hso_net flags element */
++/* - use *_bit operations on it. (bit indices not values.) */
++#define HSO_NET_RUNNING			0
++
++#define	HSO_NET_TX_TIMEOUT		(HZ*10)
++
++/* Serial port defines and structs. */
++#define HSO_SERIAL_FLAG_RX_SENT		0
++
++#define HSO_SERIAL_MAGIC		0x48534f31
++
++/* Number of ttys to handle */
++#define HSO_SERIAL_TTY_MINORS		256
++
++#define MAX_RX_URBS			2
++
++#define get_serial_by_tty(x)	\
++	(x ? (struct hso_serial *)x->driver_data : NULL)
++
++/*****************************************************************************/
++/* Debugging functions                                                       */
++/*****************************************************************************/
++#define D__(lvl_, fmt, arg...)				\
++	do {						\
++		printk(lvl_ "[%d:%s]: " fmt "\n",	\
++		       __LINE__, __func__, ## arg);	\
++	} while (0)
++
++#define D_(lvl, args...)				\
++	do {						\
++		if (lvl & debug)			\
++			D__(KERN_INFO, args);		\
++	} while (0)
++
++#define D1(args...)	D_(0x01, ##args)
++#define D2(args...)	D_(0x02, ##args)
++#define D3(args...)	D_(0x04, ##args)
++#define D4(args...)	D_(0x08, ##args)
++#define D5(args...)	D_(0x10, ##args)
++
++/*****************************************************************************/
++/* Enumerators                                                               */
++/*****************************************************************************/
++enum pkt_parse_state {
++	WAIT_IP,
++	WAIT_DATA,
++	WAIT_SYNC
++};
++
++/*****************************************************************************/
++/* Structs                                                                   */
++/*****************************************************************************/
++
++struct hso_shared_int {
++	struct usb_endpoint_descriptor *intr_endp;
++	void *shared_intr_buf;
++	struct urb *shared_intr_urb;
++	struct usb_device *usb;
++	int use_count;
++	int ref_count;
++	struct mutex shared_int_lock;
++};
++
++struct hso_net {
++	struct hso_device *parent;
++	struct net_device *net;
++	struct rfkill *rfkill;
++
++	struct usb_endpoint_descriptor *in_endp;
++	struct usb_endpoint_descriptor *out_endp;
++
++	struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
++	struct urb *mux_bulk_tx_urb;
++	void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
++	void *mux_bulk_tx_buf;
++
++	struct sk_buff *skb_rx_buf;
++	struct sk_buff *skb_tx_buf;
++
++	enum pkt_parse_state rx_parse_state;
++	spinlock_t net_lock;
++
++	unsigned short rx_buf_size;
++	unsigned short rx_buf_missing;
++	struct iphdr rx_ip_hdr;
++
++	unsigned long flags;
++};
++
++struct hso_serial {
++	struct hso_device *parent;
++	int magic;
++	u8 minor;
++
++	struct hso_shared_int *shared_int;
++
++	/* rx/tx urb could be either a bulk urb or a control urb depending
++	   on which serial port it is used on. */
++	struct urb *rx_urb[MAX_RX_URBS];
++	u8 num_rx_urbs;
++	u8 *rx_data[MAX_RX_URBS];
++	u16 rx_data_length;	/* should contain allocated length */
++
++	struct urb *tx_urb;
++	u8 *tx_data;
++	u8 *tx_buffer;
++	u16 tx_data_length;	/* should contain allocated length */
++	u16 tx_data_count;
++	u16 tx_buffer_count;
++	struct usb_ctrlrequest ctrl_req_tx;
++	struct usb_ctrlrequest ctrl_req_rx;
++
++	struct usb_endpoint_descriptor *in_endp;
++	struct usb_endpoint_descriptor *out_endp;
++
++	unsigned long flags;
++	u8 rts_state;
++	u8 dtr_state;
++	unsigned tx_urb_used:1;
++
++	/* from usb_serial_port */
++	struct tty_struct *tty;
++	int open_count;
++	spinlock_t serial_lock;
++
++	int (*write_data) (struct hso_serial *serial);
++};
++
++struct hso_device {
++	union {
++		struct hso_serial *dev_serial;
++		struct hso_net *dev_net;
++	} port_data;
++
++	u32 port_spec;
++
++	u8 is_active;
++	u8 usb_gone;
++	struct work_struct async_get_intf;
++	struct work_struct async_put_intf;
++
++	struct usb_device *usb;
++	struct usb_interface *interface;
++
++	struct device *dev;
++	struct kref ref;
++	struct mutex mutex;
++};
++
++/* Type of interface */
++#define HSO_INTF_MASK		0xFF00
++#define	HSO_INTF_MUX		0x0100
++#define	HSO_INTF_BULK   	0x0200
++
++/* Type of port */
++#define HSO_PORT_MASK		0xFF
++#define HSO_PORT_NO_PORT	0x0
++#define	HSO_PORT_CONTROL	0x1
++#define	HSO_PORT_APP		0x2
++#define	HSO_PORT_GPS		0x3
++#define	HSO_PORT_PCSC		0x4
++#define	HSO_PORT_APP2		0x5
++#define HSO_PORT_GPS_CONTROL	0x6
++#define HSO_PORT_MSD		0x7
++#define HSO_PORT_VOICE		0x8
++#define HSO_PORT_DIAG2		0x9
++#define	HSO_PORT_DIAG		0x10
++#define	HSO_PORT_MODEM		0x11
++#define	HSO_PORT_NETWORK	0x12
++
++/* Additional device info */
++#define HSO_INFO_MASK		0xFF000000
++#define HSO_INFO_CRC_BUG	0x01000000
++
++/*****************************************************************************/
++/* Prototypes                                                                */
++/*****************************************************************************/
++/* Serial driver functions */
++static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
++			       unsigned int set, unsigned int clear);
++static void ctrl_callback(struct urb *urb);
++static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
++static void hso_kick_transmit(struct hso_serial *serial);
++/* Helper functions */
++static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
++				   struct usb_device *usb, gfp_t gfp);
++static void log_usb_status(int status, const char *function);
++static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
++						  int type, int dir);
++static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
++static void hso_free_interface(struct usb_interface *intf);
++static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
++static int hso_stop_serial_device(struct hso_device *hso_dev);
++static int hso_start_net_device(struct hso_device *hso_dev);
++static void hso_free_shared_int(struct hso_shared_int *shared_int);
++static int hso_stop_net_device(struct hso_device *hso_dev);
++static void hso_serial_ref_free(struct kref *ref);
++static void async_get_intf(struct work_struct *data);
++static void async_put_intf(struct work_struct *data);
++static int hso_put_activity(struct hso_device *hso_dev);
++static int hso_get_activity(struct hso_device *hso_dev);
++
++/*****************************************************************************/
++/* Helping functions                                                         */
++/*****************************************************************************/
++
++/* #define DEBUG */
++
++#define dev2net(x) (x->port_data.dev_net)
++#define dev2ser(x) (x->port_data.dev_serial)
++
++/* Debugging functions */
++#ifdef DEBUG
++static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
++		     unsigned int len)
++{
++	u8 i = 0;
++
++	printk(KERN_DEBUG "[%d:%s]: len %d", line_count, func_name, len);
++
++	for (i = 0; i < len; i++) {
++		if (!(i % 16))
++			printk("\n    0x%03x:  ", i);
++		printk("%02x ", (unsigned char)buf[i]);
++	}
++	printk("\n");
++}
++
++#define DUMP(buf_, len_)	\
++	dbg_dump(__LINE__, __func__, buf_, len_)
++
++#define DUMP1(buf_, len_)			\
++	do {					\
++		if (0x01 & debug)		\
++			DUMP(buf_, len_);	\
++	} while (0)
++#else
++#define DUMP(buf_, len_)
++#define DUMP1(buf_, len_)
++#endif
++
++/* module parameters */
++static int debug;
++static int tty_major;
++static int disable_net;
++
++/* driver info */
++static const char driver_name[] = "hso";
++static const char tty_filename[] = "ttyHS";
++static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
++/* the usb driver itself (registered in hso_init) */
++static struct usb_driver hso_driver;
++/* serial structures */
++static struct tty_driver *tty_drv;
++static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
++static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
++static spinlock_t serial_table_lock;
++static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS];
++static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS];
++
++static const s32 default_port_spec[] = {
++	HSO_INTF_MUX | HSO_PORT_NETWORK,
++	HSO_INTF_BULK | HSO_PORT_DIAG,
++	HSO_INTF_BULK | HSO_PORT_MODEM,
++	0
++};
++
++static const s32 icon321_port_spec[] = {
++	HSO_INTF_MUX | HSO_PORT_NETWORK,
++	HSO_INTF_BULK | HSO_PORT_DIAG2,
++	HSO_INTF_BULK | HSO_PORT_MODEM,
++	HSO_INTF_BULK | HSO_PORT_DIAG,
++	0
++};
++
++#define default_port_device(vendor, product)	\
++	USB_DEVICE(vendor, product),	\
++		.driver_info = (kernel_ulong_t)default_port_spec
++
++#define icon321_port_device(vendor, product)	\
++	USB_DEVICE(vendor, product),	\
++		.driver_info = (kernel_ulong_t)icon321_port_spec
++
++/* list of devices we support */
++static const struct usb_device_id hso_ids[] = {
++	{default_port_device(0x0af0, 0x6711)},
++	{default_port_device(0x0af0, 0x6731)},
++	{default_port_device(0x0af0, 0x6751)},
++	{default_port_device(0x0af0, 0x6771)},
++	{default_port_device(0x0af0, 0x6791)},
++	{default_port_device(0x0af0, 0x6811)},
++	{default_port_device(0x0af0, 0x6911)},
++	{default_port_device(0x0af0, 0x6951)},
++	{default_port_device(0x0af0, 0x6971)},
++	{default_port_device(0x0af0, 0x7011)},
++	{default_port_device(0x0af0, 0x7031)},
++	{default_port_device(0x0af0, 0x7051)},
++	{default_port_device(0x0af0, 0x7071)},
++	{default_port_device(0x0af0, 0x7111)},
++	{default_port_device(0x0af0, 0x7211)},
++	{default_port_device(0x0af0, 0x7251)},
++	{default_port_device(0x0af0, 0x7271)},
++	{default_port_device(0x0af0, 0x7311)},
++	{default_port_device(0x0af0, 0xc031)},	/* Icon-Edge */
++	{icon321_port_device(0x0af0, 0xd013)},	/* Module HSxPA */
++	{icon321_port_device(0x0af0, 0xd031)},	/* Icon-321 */
++	{default_port_device(0x0af0, 0xd033)},	/* Icon-322 */
++	{USB_DEVICE(0x0af0, 0x7301)},		/* GE40x */
++	{USB_DEVICE(0x0af0, 0x7361)},		/* GE40x */
++	{USB_DEVICE(0x0af0, 0x7401)},		/* GI 0401 */
++	{USB_DEVICE(0x0af0, 0x7501)},		/* GTM 382 */
++	{USB_DEVICE(0x0af0, 0x7601)},		/* GE40x */
++	{}
++};
++MODULE_DEVICE_TABLE(usb, hso_ids);
++
++/* Sysfs attribute */
++static ssize_t hso_sysfs_show_porttype(struct device *dev,
++				       struct device_attribute *attr,
++				       char *buf)
++{
++	struct hso_device *hso_dev = dev->driver_data;
++	char *port_name;
++
++	if (!hso_dev)
++		return 0;
++
++	switch (hso_dev->port_spec & HSO_PORT_MASK) {
++	case HSO_PORT_CONTROL:
++		port_name = "Control";
++		break;
++	case HSO_PORT_APP:
++		port_name = "Application";
++		break;
++	case HSO_PORT_APP2:
++		port_name = "Application2";
++		break;
++	case HSO_PORT_GPS:
++		port_name = "GPS";
++		break;
++	case HSO_PORT_GPS_CONTROL:
++		port_name = "GPS Control";
++		break;
++	case HSO_PORT_PCSC:
++		port_name = "PCSC";
++		break;
++	case HSO_PORT_DIAG:
++		port_name = "Diagnostic";
++		break;
++	case HSO_PORT_DIAG2:
++		port_name = "Diagnostic2";
++		break;
++	case HSO_PORT_MODEM:
++		port_name = "Modem";
++		break;
++	case HSO_PORT_NETWORK:
++		port_name = "Network";
++		break;
++	default:
++		port_name = "Unknown";
++		break;
++	}
++
++	return sprintf(buf, "%s\n", port_name);
++}
++static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
++
++/* converts mux value to a port spec value */
++static u32 hso_mux_to_port(int mux)
++{
++	u32 result;
++
++	switch (mux) {
++	case 0x1:
++		result = HSO_PORT_CONTROL;
++		break;
++	case 0x2:
++		result = HSO_PORT_APP;
++		break;
++	case 0x4:
++		result = HSO_PORT_PCSC;
++		break;
++	case 0x8:
++		result = HSO_PORT_GPS;
++		break;
++	case 0x10:
++		result = HSO_PORT_APP2;
++		break;
++	default:
++		result = HSO_PORT_NO_PORT;
++	}
++	return result;
++}
++
++/* converts port spec value to a mux value */
++static u32 hso_port_to_mux(int port)
++{
++	u32 result;
++
++	switch (port & HSO_PORT_MASK) {
++	case HSO_PORT_CONTROL:
++		result = 0x0;
++		break;
++	case HSO_PORT_APP:
++		result = 0x1;
++		break;
++	case HSO_PORT_PCSC:
++		result = 0x2;
++		break;
++	case HSO_PORT_GPS:
++		result = 0x3;
++		break;
++	case HSO_PORT_APP2:
++		result = 0x4;
++		break;
++	default:
++		result = 0x0;
++	}
++	return result;
++}
++
++static struct hso_serial *get_serial_by_shared_int_and_type(
++					struct hso_shared_int *shared_int,
++					int mux)
++{
++	int i, port;
++
++	port = hso_mux_to_port(mux);
++
++	for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
++		if (serial_table[i]
++		    && (dev2ser(serial_table[i])->shared_int == shared_int)
++		    && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
++			return dev2ser(serial_table[i]);
++		}
++	}
++
++	return NULL;
++}
++
++static struct hso_serial *get_serial_by_index(unsigned index)
++{
++	struct hso_serial *serial;
++	unsigned long flags;
++
++	if (!serial_table[index])
++		return NULL;
++	spin_lock_irqsave(&serial_table_lock, flags);
++	serial = dev2ser(serial_table[index]);
++	spin_unlock_irqrestore(&serial_table_lock, flags);
++
++	return serial;
++}
++
++static int get_free_serial_index(void)
++{
++	int index;
++	unsigned long flags;
++
++	spin_lock_irqsave(&serial_table_lock, flags);
++	for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
++		if (serial_table[index] == NULL) {
++			spin_unlock_irqrestore(&serial_table_lock, flags);
++			return index;
++		}
++	}
++	spin_unlock_irqrestore(&serial_table_lock, flags);
++
++	printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
++	return -1;
++}
++
++static void set_serial_by_index(unsigned index, struct hso_serial *serial)
++{
++	unsigned long flags;
++	spin_lock_irqsave(&serial_table_lock, flags);
++	if (serial)
++		serial_table[index] = serial->parent;
++	else
++		serial_table[index] = NULL;
++	spin_unlock_irqrestore(&serial_table_lock, flags);
++}
++
++/* log a meaningfull explanation of an USB status */
++static void log_usb_status(int status, const char *function)
++{
++	char *explanation;
++
++	switch (status) {
++	case -ENODEV:
++		explanation = "no device";
++		break;
++	case -ENOENT:
++		explanation = "endpoint not enabled";
++		break;
++	case -EPIPE:
++		explanation = "endpoint stalled";
++		break;
++	case -ENOSPC:
++		explanation = "not enough bandwidth";
++		break;
++	case -ESHUTDOWN:
++		explanation = "device disabled";
++		break;
++	case -EHOSTUNREACH:
++		explanation = "device suspended";
++		break;
++	case -EINVAL:
++	case -EAGAIN:
++	case -EFBIG:
++	case -EMSGSIZE:
++		explanation = "internal error";
++		break;
++	default:
++		explanation = "unknown status";
++		break;
++	}
++	D1("%s: received USB status - %s (%d)", function, explanation, status);
++}
++
++/* Network interface functions */
++
++/* called when net interface is brought up by ifconfig */
++static int hso_net_open(struct net_device *net)
++{
++	struct hso_net *odev = netdev_priv(net);
++	unsigned long flags = 0;
++
++	if (!odev) {
++		dev_err(&net->dev, "No net device !\n");
++		return -ENODEV;
++	}
++
++	odev->skb_tx_buf = NULL;
++
++	/* setup environment */
++	spin_lock_irqsave(&odev->net_lock, flags);
++	odev->rx_parse_state = WAIT_IP;
++	odev->rx_buf_size = 0;
++	odev->rx_buf_missing = sizeof(struct iphdr);
++	spin_unlock_irqrestore(&odev->net_lock, flags);
++
++	hso_start_net_device(odev->parent);
++
++	/* We are up and running. */
++	set_bit(HSO_NET_RUNNING, &odev->flags);
++
++	/* Tell the kernel we are ready to start receiving from it */
++	netif_start_queue(net);
++
++	return 0;
++}
++
++/* called when interface is brought down by ifconfig */
++static int hso_net_close(struct net_device *net)
++{
++	struct hso_net *odev = netdev_priv(net);
++
++	/* we don't need the queue anymore */
++	netif_stop_queue(net);
++	/* no longer running */
++	clear_bit(HSO_NET_RUNNING, &odev->flags);
++
++	hso_stop_net_device(odev->parent);
++
++	/* done */
++	return 0;
++}
++
++/* USB tells is xmit done, we should start the netqueue again */
++static void write_bulk_callback(struct urb *urb)
++{
++	struct hso_net *odev = urb->context;
++	int status = urb->status;
++
++	/* Sanity check */
++	if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
++		dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
++		return;
++	}
++
++	/* Do we still have a valid kernel network device? */
++	if (!netif_device_present(odev->net)) {
++		dev_err(&urb->dev->dev, "%s: net device not present\n",
++			__func__);
++		return;
++	}
++
++	/* log status, but don't act on it, we don't need to resubmit anything
++	 * anyhow */
++	if (status)
++		log_usb_status(status, __func__);
++
++	hso_put_activity(odev->parent);
++
++	/* Tell the network interface we are ready for another frame */
++	netif_wake_queue(odev->net);
++}
++
++/* called by kernel when we need to transmit a packet */
++static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
++{
++	struct hso_net *odev = netdev_priv(net);
++	int result;
++
++	/* Tell the kernel, "No more frames 'til we are done with this one." */
++	netif_stop_queue(net);
++	if (hso_get_activity(odev->parent) == -EAGAIN) {
++		odev->skb_tx_buf = skb;
++		return 0;
++	}
++
++	/* log if asked */
++	DUMP1(skb->data, skb->len);
++	/* Copy it from kernel memory to OUR memory */
++	memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
++	D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
++
++	/* Fill in the URB for shipping it out. */
++	usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
++			  odev->parent->usb,
++			  usb_sndbulkpipe(odev->parent->usb,
++					  odev->out_endp->
++					  bEndpointAddress & 0x7F),
++			  odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
++			  odev);
++
++	/* Deal with the Zero Length packet problem, I hope */
++	odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
++
++	/* Send the URB on its merry way. */
++	result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
++	if (result) {
++		dev_warn(&odev->parent->interface->dev,
++			"failed mux_bulk_tx_urb %d", result);
++		net->stats.tx_errors++;
++		netif_start_queue(net);
++	} else {
++		net->stats.tx_packets++;
++		net->stats.tx_bytes += skb->len;
++		/* And tell the kernel when the last transmit started. */
++		net->trans_start = jiffies;
++	}
++	dev_kfree_skb(skb);
++	/* we're done */
++	return result;
++}
++
++static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
++{
++	struct hso_net *odev = netdev_priv(net);
++
++	strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
++	strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
++	usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
++}
++
++static struct ethtool_ops ops = {
++	.get_drvinfo = hso_get_drvinfo,
++	.get_link = ethtool_op_get_link
++};
++
++/* called when a packet did not ack after watchdogtimeout */
++static void hso_net_tx_timeout(struct net_device *net)
++{
++	struct hso_net *odev = netdev_priv(net);
++
++	if (!odev)
++		return;
++
++	/* Tell syslog we are hosed. */
++	dev_warn(&net->dev, "Tx timed out.\n");
++
++	/* Tear the waiting frame off the list */
++	if (odev->mux_bulk_tx_urb
++	    && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
++		usb_unlink_urb(odev->mux_bulk_tx_urb);
++
++	/* Update statistics */
++	net->stats.tx_errors++;
++}
++
++/* make a real packet from the received USB buffer */
++static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
++			unsigned int count, unsigned char is_eop)
++{
++	unsigned short temp_bytes;
++	unsigned short buffer_offset = 0;
++	unsigned short frame_len;
++	unsigned char *tmp_rx_buf;
++
++	/* log if needed */
++	D1("Rx %d bytes", count);
++	DUMP(ip_pkt, min(128, (int)count));
++
++	while (count) {
++		switch (odev->rx_parse_state) {
++		case WAIT_IP:
++			/* waiting for IP header. */
++			/* wanted bytes - size of ip header */
++			temp_bytes =
++			    (count <
++			     odev->rx_buf_missing) ? count : odev->
++			    rx_buf_missing;
++
++			memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
++			       odev->rx_buf_size, ip_pkt + buffer_offset,
++			       temp_bytes);
++
++			odev->rx_buf_size += temp_bytes;
++			buffer_offset += temp_bytes;
++			odev->rx_buf_missing -= temp_bytes;
++			count -= temp_bytes;
++
++			if (!odev->rx_buf_missing) {
++				/* header is complete allocate an sk_buffer and
++				 * continue to WAIT_DATA */
++				frame_len = ntohs(odev->rx_ip_hdr.tot_len);
++
++				if ((frame_len > DEFAULT_MRU) ||
++				    (frame_len < sizeof(struct iphdr))) {
++					dev_err(&odev->net->dev,
++						"Invalid frame (%d) length\n",
++						frame_len);
++					odev->rx_parse_state = WAIT_SYNC;
++					continue;
++				}
++				/* Allocate an sk_buff */
++				odev->skb_rx_buf = dev_alloc_skb(frame_len);
++				if (!odev->skb_rx_buf) {
++					/* We got no receive buffer. */
++					D1("could not allocate memory");
++					odev->rx_parse_state = WAIT_SYNC;
++					return;
++				}
++				/* Here's where it came from */
++				odev->skb_rx_buf->dev = odev->net;
++
++				/* Copy what we got so far. make room for iphdr
++				 * after tail. */
++				tmp_rx_buf =
++				    skb_put(odev->skb_rx_buf,
++					    sizeof(struct iphdr));
++				memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
++				       sizeof(struct iphdr));
++
++				/* ETH_HLEN */
++				odev->rx_buf_size = sizeof(struct iphdr);
++
++				/* Filip actually use .tot_len */
++				odev->rx_buf_missing =
++				    frame_len - sizeof(struct iphdr);
++				odev->rx_parse_state = WAIT_DATA;
++			}
++			break;
++
++		case WAIT_DATA:
++			temp_bytes = (count < odev->rx_buf_missing)
++					? count : odev->rx_buf_missing;
++
++			/* Copy the rest of the bytes that are left in the
++			 * buffer into the waiting sk_buf. */
++			/* Make room for temp_bytes after tail. */
++			tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
++			memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
++
++			odev->rx_buf_missing -= temp_bytes;
++			count -= temp_bytes;
++			buffer_offset += temp_bytes;
++			odev->rx_buf_size += temp_bytes;
++			if (!odev->rx_buf_missing) {
++				/* Packet is complete. Inject into stack. */
++				/* We have IP packet here */
++				odev->skb_rx_buf->protocol =
++						__constant_htons(ETH_P_IP);
++				/* don't check it */
++				odev->skb_rx_buf->ip_summed =
++					CHECKSUM_UNNECESSARY;
++
++				skb_reset_mac_header(odev->skb_rx_buf);
++
++				/* Ship it off to the kernel */
++				netif_rx(odev->skb_rx_buf);
++				/* No longer our buffer. */
++				odev->skb_rx_buf = NULL;
++
++				/* update out statistics */
++				odev->net->stats.rx_packets++;
++
++				odev->net->stats.rx_bytes += odev->rx_buf_size;
++
++				odev->rx_buf_size = 0;
++				odev->rx_buf_missing = sizeof(struct iphdr);
++				odev->rx_parse_state = WAIT_IP;
++			}
++			break;
++
++		case WAIT_SYNC:
++			D1(" W_S");
++			count = 0;
++			break;
++		default:
++			D1(" ");
++			count--;
++			break;
++		}
++	}
++
++	/* Recovery mechanism for WAIT_SYNC state. */
++	if (is_eop) {
++		if (odev->rx_parse_state == WAIT_SYNC) {
++			odev->rx_parse_state = WAIT_IP;
++			odev->rx_buf_size = 0;
++			odev->rx_buf_missing = sizeof(struct iphdr);
++		}
++	}
++}
++
++/* Moving data from usb to kernel (in interrupt state) */
++static void read_bulk_callback(struct urb *urb)
++{
++	struct hso_net *odev = urb->context;
++	struct net_device *net;
++	int result;
++	int status = urb->status;
++
++	/* is al ok?  (Filip: Who's Al ?) */
++	if (status) {
++		log_usb_status(status, __func__);
++		return;
++	}
++
++	/* Sanity check */
++	if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
++		D1("BULK IN callback but driver is not active!");
++		return;
++	}
++	usb_mark_last_busy(urb->dev);
++
++	net = odev->net;
++
++	if (!netif_device_present(net)) {
++		/* Somebody killed our network interface... */
++		return;
++	}
++
++	if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
++		u32 rest;
++		u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
++		rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
++		if (((rest == 5) || (rest == 6))
++		    && !memcmp(((u8 *) urb->transfer_buffer) +
++			       urb->actual_length - 4, crc_check, 4)) {
++			urb->actual_length -= 4;
++		}
++	}
++
++	/* do we even have a packet? */
++	if (urb->actual_length) {
++		/* Handle the IP stream, add header and push it onto network
++		 * stack if the packet is complete. */
++		spin_lock(&odev->net_lock);
++		packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
++			    (urb->transfer_buffer_length >
++			     urb->actual_length) ? 1 : 0);
++		spin_unlock(&odev->net_lock);
++	}
++
++	/* We are done with this URB, resubmit it. Prep the USB to wait for
++	 * another frame. Reuse same as received. */
++	usb_fill_bulk_urb(urb,
++			  odev->parent->usb,
++			  usb_rcvbulkpipe(odev->parent->usb,
++					  odev->in_endp->
++					  bEndpointAddress & 0x7F),
++			  urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
++			  read_bulk_callback, odev);
++
++	/* Give this to the USB subsystem so it can tell us when more data
++	 * arrives. */
++	result = usb_submit_urb(urb, GFP_ATOMIC);
++	if (result)
++		dev_warn(&odev->parent->interface->dev,
++			 "%s failed submit mux_bulk_rx_urb %d", __func__,
++			 result);
++}
++
++/* Serial driver functions */
++
++static void _hso_serial_set_termios(struct tty_struct *tty,
++				    struct ktermios *old)
++{
++	struct hso_serial *serial = get_serial_by_tty(tty);
++	struct ktermios *termios;
++
++	if ((!tty) || (!tty->termios) || (!serial)) {
++		printk(KERN_ERR "%s: no tty structures", __func__);
++		return;
++	}
++
++	D4("port %d", serial->minor);
++
++	/*
++	 * The default requirements for this device are:
++	 */
++	termios = tty->termios;
++	termios->c_iflag &=
++		~(IGNBRK	/* disable ignore break */
++		| BRKINT	/* disable break causes interrupt */
++		| PARMRK	/* disable mark parity errors */
++		| ISTRIP	/* disable clear high bit of input characters */
++		| INLCR		/* disable translate NL to CR */
++		| IGNCR		/* disable ignore CR */
++		| ICRNL		/* disable translate CR to NL */
++		| IXON);	/* disable enable XON/XOFF flow control */
++
++	/* disable postprocess output characters */
++	termios->c_oflag &= ~OPOST;
++
++	termios->c_lflag &=
++		~(ECHO		/* disable echo input characters */
++		| ECHONL	/* disable echo new line */
++		| ICANON	/* disable erase, kill, werase, and rprnt
++				   special characters */
++		| ISIG		/* disable interrupt, quit, and suspend special
++				   characters */
++		| IEXTEN);	/* disable non-POSIX special characters */
++
++	termios->c_cflag &=
++		~(CSIZE		/* no size */
++		| PARENB	/* disable parity bit */
++		| CBAUD		/* clear current baud rate */
++		| CBAUDEX);	/* clear current buad rate */
++
++	termios->c_cflag |= CS8;	/* character size 8 bits */
++
++	/* baud rate 115200 */
++	tty_encode_baud_rate(serial->tty, 115200, 115200);
++
++	/*
++	 * Force low_latency on; otherwise the pushes are scheduled;
++	 * this is bad as it opens up the possibility of dropping bytes
++	 * on the floor.  We don't want to drop bytes on the floor. :)
++	 */
++	serial->tty->low_latency = 1;
++	return;
++}
++
++/* open the requested serial port */
++static int hso_serial_open(struct tty_struct *tty, struct file *filp)
++{
++	struct hso_serial *serial = get_serial_by_index(tty->index);
++	int result;
++
++	/* sanity check */
++	if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
++		tty->driver_data = NULL;
++		D1("Failed to open port");
++		return -ENODEV;
++	}
++
++	mutex_lock(&serial->parent->mutex);
++	result = usb_autopm_get_interface(serial->parent->interface);
++	if (result < 0)
++		goto err_out;
++
++	D1("Opening %d", serial->minor);
++	kref_get(&serial->parent->ref);
++
++	/* setup */
++	tty->driver_data = serial;
++	serial->tty = tty;
++
++	/* check for port allready opened, if not set the termios */
++	serial->open_count++;
++	if (serial->open_count == 1) {
++		tty->low_latency = 1;
++		serial->flags = 0;
++		/* Force default termio settings */
++		_hso_serial_set_termios(tty, NULL);
++		result = hso_start_serial_device(serial->parent, GFP_KERNEL);
++		if (result) {
++			hso_stop_serial_device(serial->parent);
++			serial->open_count--;
++			kref_put(&serial->parent->ref, hso_serial_ref_free);
++		}
++	} else {
++		D1("Port was already open");
++	}
++
++	usb_autopm_put_interface(serial->parent->interface);
++
++	/* done */
++	if (result)
++		hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
++err_out:
++	mutex_unlock(&serial->parent->mutex);
++	return result;
++}
++
++/* close the requested serial port */
++static void hso_serial_close(struct tty_struct *tty, struct file *filp)
++{
++	struct hso_serial *serial = tty->driver_data;
++	u8 usb_gone;
++
++	D1("Closing serial port");
++
++	mutex_lock(&serial->parent->mutex);
++	usb_gone = serial->parent->usb_gone;
++
++	if (!usb_gone)
++		usb_autopm_get_interface(serial->parent->interface);
++
++	/* reset the rts and dtr */
++	/* do the actual close */
++	serial->open_count--;
++	if (serial->open_count <= 0) {
++		kref_put(&serial->parent->ref, hso_serial_ref_free);
++		serial->open_count = 0;
++		if (serial->tty) {
++			serial->tty->driver_data = NULL;
++			serial->tty = NULL;
++		}
++		if (!usb_gone)
++			hso_stop_serial_device(serial->parent);
++	}
++	if (!usb_gone)
++		usb_autopm_put_interface(serial->parent->interface);
++	mutex_unlock(&serial->parent->mutex);
++}
++
++/* close the requested serial port */
++static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
++			    int count)
++{
++	struct hso_serial *serial = get_serial_by_tty(tty);
++	int space, tx_bytes;
++	unsigned long flags;
++
++	/* sanity check */
++	if (serial == NULL) {
++		printk(KERN_ERR "%s: serial is NULL\n", __func__);
++		return -ENODEV;
++	}
++
++	spin_lock_irqsave(&serial->serial_lock, flags);
++
++	space = serial->tx_data_length - serial->tx_buffer_count;
++	tx_bytes = (count < space) ? count : space;
++
++	if (!tx_bytes)
++		goto out;
++
++	memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
++	serial->tx_buffer_count += tx_bytes;
++
++out:
++	spin_unlock_irqrestore(&serial->serial_lock, flags);
++
++	hso_kick_transmit(serial);
++	/* done */
++	return tx_bytes;
++}
++
++/* how much room is there for writing */
++static int hso_serial_write_room(struct tty_struct *tty)
++{
++	struct hso_serial *serial = get_serial_by_tty(tty);
++	int room;
++	unsigned long flags;
++
++	spin_lock_irqsave(&serial->serial_lock, flags);
++	room = serial->tx_data_length - serial->tx_buffer_count;
++	spin_unlock_irqrestore(&serial->serial_lock, flags);
++
++	/* return free room */
++	return room;
++}
++
++/* setup the term */
++static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
++{
++	struct hso_serial *serial = get_serial_by_tty(tty);
++	unsigned long flags;
++
++	if (old)
++		D5("Termios called with: cflags new[%d] - old[%d]",
++		   tty->termios->c_cflag, old->c_cflag);
++
++	/* the actual setup */
++	spin_lock_irqsave(&serial->serial_lock, flags);
++	if (serial->open_count)
++		_hso_serial_set_termios(tty, old);
++	else
++		tty->termios = old;
++	spin_unlock_irqrestore(&serial->serial_lock, flags);
++
++	/* done */
++	return;
++}
++
++/* how many characters in the buffer */
++static int hso_serial_chars_in_buffer(struct tty_struct *tty)
++{
++	struct hso_serial *serial = get_serial_by_tty(tty);
++	int chars;
++	unsigned long flags;
++
++	/* sanity check */
++	if (serial == NULL)
++		return 0;
++
++	spin_lock_irqsave(&serial->serial_lock, flags);
++	chars = serial->tx_buffer_count;
++	spin_unlock_irqrestore(&serial->serial_lock, flags);
++
++	return chars;
++}
++
++static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
++{
++	unsigned int value;
++	struct hso_serial *serial = get_serial_by_tty(tty);
++	unsigned long flags;
++
++	/* sanity check */
++	if (!serial) {
++		D1("no tty structures");
++		return -EINVAL;
++	}
++
++	spin_lock_irqsave(&serial->serial_lock, flags);
++	value = ((serial->rts_state) ? TIOCM_RTS : 0) |
++	    ((serial->dtr_state) ? TIOCM_DTR : 0);
++	spin_unlock_irqrestore(&serial->serial_lock, flags);
++
++	return value;
++}
++
++static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
++			       unsigned int set, unsigned int clear)
++{
++	int val = 0;
++	unsigned long flags;
++	int if_num;
++	struct hso_serial *serial = get_serial_by_tty(tty);
++
++	/* sanity check */
++	if (!serial) {
++		D1("no tty structures");
++		return -EINVAL;
++	}
++	if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
++
++	spin_lock_irqsave(&serial->serial_lock, flags);
++	if (set & TIOCM_RTS)
++		serial->rts_state = 1;
++	if (set & TIOCM_DTR)
++		serial->dtr_state = 1;
++
++	if (clear & TIOCM_RTS)
++		serial->rts_state = 0;
++	if (clear & TIOCM_DTR)
++		serial->dtr_state = 0;
++
++	if (serial->dtr_state)
++		val |= 0x01;
++	if (serial->rts_state)
++		val |= 0x02;
++
++	spin_unlock_irqrestore(&serial->serial_lock, flags);
++
++	return usb_control_msg(serial->parent->usb,
++			       usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
++			       0x21, val, if_num, NULL, 0,
++			       USB_CTRL_SET_TIMEOUT);
++}
++
++/* starts a transmit */
++static void hso_kick_transmit(struct hso_serial *serial)
++{
++	u8 *temp;
++	unsigned long flags;
++	int res;
++
++	spin_lock_irqsave(&serial->serial_lock, flags);
++	if (!serial->tx_buffer_count)
++		goto out;
++
++	if (serial->tx_urb_used)
++		goto out;
++
++	/* Wakeup USB interface if necessary */
++	if (hso_get_activity(serial->parent) == -EAGAIN)
++		goto out;
++
++	/* Switch pointers around to avoid memcpy */
++	temp = serial->tx_buffer;
++	serial->tx_buffer = serial->tx_data;
++	serial->tx_data = temp;
++	serial->tx_data_count = serial->tx_buffer_count;
++	serial->tx_buffer_count = 0;
++
++	/* If temp is set, it means we switched buffers */
++	if (temp && serial->write_data) {
++		res = serial->write_data(serial);
++		if (res >= 0)
++			serial->tx_urb_used = 1;
++	}
++out:
++	spin_unlock_irqrestore(&serial->serial_lock, flags);
++}
++
++/* make a request (for reading and writing data to muxed serial port) */
++static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
++			      struct urb *ctrl_urb,
++			      struct usb_ctrlrequest *ctrl_req,
++			      u8 *ctrl_urb_data, u32 size)
++{
++	int result;
++	int pipe;
++
++	/* Sanity check */
++	if (!serial || !ctrl_urb || !ctrl_req) {
++		printk(KERN_ERR "%s: Wrong arguments\n", __func__);
++		return -EINVAL;
++	}
++
++	/* initialize */
++	ctrl_req->wValue = 0;
++	ctrl_req->wIndex = hso_port_to_mux(port);
++	ctrl_req->wLength = size;
++
++	if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
++		/* Reading command */
++		ctrl_req->bRequestType = USB_DIR_IN |
++					 USB_TYPE_OPTION_VENDOR |
++					 USB_RECIP_INTERFACE;
++		ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
++		pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
++	} else {
++		/* Writing command */
++		ctrl_req->bRequestType = USB_DIR_OUT |
++					 USB_TYPE_OPTION_VENDOR |
++					 USB_RECIP_INTERFACE;
++		ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
++		pipe = usb_sndctrlpipe(serial->parent->usb, 0);
++	}
++	/* syslog */
++	D2("%s command (%02x) len: %d, port: %d",
++	   type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
++	   ctrl_req->bRequestType, ctrl_req->wLength, port);
++
++	/* Load ctrl urb */
++	ctrl_urb->transfer_flags = 0;
++	usb_fill_control_urb(ctrl_urb,
++			     serial->parent->usb,
++			     pipe,
++			     (u8 *) ctrl_req,
++			     ctrl_urb_data, size, ctrl_callback, serial);
++	/* Send it on merry way */
++	result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
++	if (result) {
++		dev_err(&ctrl_urb->dev->dev,
++			"%s failed submit ctrl_urb %d type %d", __func__,
++			result, type);
++		return result;
++	}
++
++	/* done */
++	return size;
++}
++
++/* called by intr_callback when read occurs */
++static int hso_mux_serial_read(struct hso_serial *serial)
++{
++	if (!serial)
++		return -EINVAL;
++
++	/* clean data */
++	memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
++	/* make the request */
++
++	if (serial->num_rx_urbs != 1) {
++		dev_err(&serial->parent->interface->dev,
++			"ERROR: mux'd reads with multiple buffers "
++			"not possible\n");
++		return 0;
++	}
++	return mux_device_request(serial,
++				  USB_CDC_GET_ENCAPSULATED_RESPONSE,
++				  serial->parent->port_spec & HSO_PORT_MASK,
++				  serial->rx_urb[0],
++				  &serial->ctrl_req_rx,
++				  serial->rx_data[0], serial->rx_data_length);
++}
++
++/* used for muxed serial port callback (muxed serial read) */
++static void intr_callback(struct urb *urb)
++{
++	struct hso_shared_int *shared_int = urb->context;
++	struct hso_serial *serial;
++	unsigned char *port_req;
++	int status = urb->status;
++	int i;
++
++	usb_mark_last_busy(urb->dev);
++
++	/* sanity check */
++	if (!shared_int)
++		return;
++
++	/* status check */
++	if (status) {
++		log_usb_status(status, __func__);
++		return;
++	}
++	D4("\n--- Got intr callback 0x%02X ---", status);
++
++	/* what request? */
++	port_req = urb->transfer_buffer;
++	D4(" port_req = 0x%.2X\n", *port_req);
++	/* loop over all muxed ports to find the one sending this */
++	for (i = 0; i < 8; i++) {
++		/* max 8 channels on MUX */
++		if (*port_req & (1 << i)) {
++			serial = get_serial_by_shared_int_and_type(shared_int,
++								   (1 << i));
++			if (serial != NULL) {
++				D1("Pending read interrupt on port %d\n", i);
++				if (!test_and_set_bit(HSO_SERIAL_FLAG_RX_SENT,
++						      &serial->flags)) {
++					/* Setup and send a ctrl req read on
++					 * port i */
++					hso_mux_serial_read(serial);
++				} else {
++					D1("Already pending a read on "
++					   "port %d\n", i);
++				}
++			}
++		}
++	}
++	/* Resubmit interrupt urb */
++	hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
++}
++
++/* called for writing to muxed serial port */
++static int hso_mux_serial_write_data(struct hso_serial *serial)
++{
++	if (NULL == serial)
++		return -EINVAL;
++
++	return mux_device_request(serial,
++				  USB_CDC_SEND_ENCAPSULATED_COMMAND,
++				  serial->parent->port_spec & HSO_PORT_MASK,
++				  serial->tx_urb,
++				  &serial->ctrl_req_tx,
++				  serial->tx_data, serial->tx_data_count);
++}
++
++/* write callback for Diag and CS port */
++static void hso_std_serial_write_bulk_callback(struct urb *urb)
++{
++	struct hso_serial *serial = urb->context;
++	int status = urb->status;
++
++	/* sanity check */
++	if (!serial) {
++		D1("serial == NULL");
++		return;
++	}
++
++	spin_lock(&serial->serial_lock);
++	serial->tx_urb_used = 0;
++	spin_unlock(&serial->serial_lock);
++	if (status) {
++		log_usb_status(status, __func__);
++		return;
++	}
++	hso_put_activity(serial->parent);
++	tty_wakeup(serial->tty);
++	hso_kick_transmit(serial);
++
++	D1(" ");
++	return;
++}
++
++/* called for writing diag or CS serial port */
++static int hso_std_serial_write_data(struct hso_serial *serial)
++{
++	int count = serial->tx_data_count;
++	int result;
++
++	usb_fill_bulk_urb(serial->tx_urb,
++			  serial->parent->usb,
++			  usb_sndbulkpipe(serial->parent->usb,
++					  serial->out_endp->
++					  bEndpointAddress & 0x7F),
++			  serial->tx_data, serial->tx_data_count,
++			  hso_std_serial_write_bulk_callback, serial);
++
++	result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
++	if (result) {
++		dev_warn(&serial->parent->usb->dev,
++			 "Failed to submit urb - res %d\n", result);
++		return result;
++	}
++
++	return count;
++}
++
++/* callback after read or write on muxed serial port */
++static void ctrl_callback(struct urb *urb)
++{
++	struct hso_serial *serial = urb->context;
++	struct usb_ctrlrequest *req;
++	int status = urb->status;
++
++	/* sanity check */
++	if (!serial)
++		return;
++
++	spin_lock(&serial->serial_lock);
++	serial->tx_urb_used = 0;
++	spin_unlock(&serial->serial_lock);
++	if (status) {
++		log_usb_status(status, __func__);
++		return;
++	}
++
++	/* what request? */
++	req = (struct usb_ctrlrequest *)(urb->setup_packet);
++	D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
++	D4("Actual length of urb = %d\n", urb->actual_length);
++	DUMP1(urb->transfer_buffer, urb->actual_length);
++
++	if (req->bRequestType ==
++	    (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
++		/* response to a read command */
++		if (serial->open_count > 0) {
++			/* handle RX data the normal way */
++			put_rxbuf_data(urb, serial);
++		}
++
++		/* Re issue a read as long as we receive data. */
++		if (urb->actual_length != 0)
++			hso_mux_serial_read(serial);
++		else
++			clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags);
++	} else {
++		hso_put_activity(serial->parent);
++		tty_wakeup(serial->tty);
++		/* response to a write command */
++		hso_kick_transmit(serial);
++	}
++}
++
++/* handle RX data for serial port */
++static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
++{
++	struct tty_struct *tty = serial->tty;
++
++	/* Sanity check */
++	if (urb == NULL || serial == NULL) {
++		D1("serial = NULL");
++		return;
++	}
++
++	/* Push data to tty */
++	if (tty && urb->actual_length) {
++		D1("data to push to tty");
++		tty_insert_flip_string(tty, urb->transfer_buffer,
++				       urb->actual_length);
++		tty_flip_buffer_push(tty);
++	}
++}
++
++/* read callback for Diag and CS port */
++static void hso_std_serial_read_bulk_callback(struct urb *urb)
++{
++	struct hso_serial *serial = urb->context;
++	int result;
++	int status = urb->status;
++
++	/* sanity check */
++	if (!serial) {
++		D1("serial == NULL");
++		return;
++	} else if (status) {
++		log_usb_status(status, __func__);
++		return;
++	}
++
++	D4("\n--- Got serial_read_bulk callback %02x ---", status);
++	D1("Actual length = %d\n", urb->actual_length);
++	DUMP1(urb->transfer_buffer, urb->actual_length);
++
++	/* Anyone listening? */
++	if (serial->open_count == 0)
++		return;
++
++	if (status == 0) {
++		if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
++			u32 rest;
++			u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
++			rest =
++			    urb->actual_length %
++			    serial->in_endp->wMaxPacketSize;
++			if (((rest == 5) || (rest == 6))
++			    && !memcmp(((u8 *) urb->transfer_buffer) +
++				       urb->actual_length - 4, crc_check, 4)) {
++				urb->actual_length -= 4;
++			}
++		}
++		/* Valid data, handle RX data */
++		put_rxbuf_data(urb, serial);
++	} else if (status == -ENOENT || status == -ECONNRESET) {
++		/* Unlinked - check for throttled port. */
++		D2("Port %d, successfully unlinked urb", serial->minor);
++	} else {
++		D2("Port %d, status = %d for read urb", serial->minor, status);
++		return;
++	}
++
++	usb_mark_last_busy(urb->dev);
++
++	/* We are done with this URB, resubmit it. Prep the USB to wait for
++	 * another frame */
++	usb_fill_bulk_urb(urb, serial->parent->usb,
++			  usb_rcvbulkpipe(serial->parent->usb,
++					  serial->in_endp->
++					  bEndpointAddress & 0x7F),
++			  urb->transfer_buffer, serial->rx_data_length,
++			  hso_std_serial_read_bulk_callback, serial);
++	/* Give this to the USB subsystem so it can tell us when more data
++	 * arrives. */
++	result = usb_submit_urb(urb, GFP_ATOMIC);
++	if (result) {
++		dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d",
++			__func__, result);
++	}
++}
++
++/* Base driver functions */
++
++static void hso_log_port(struct hso_device *hso_dev)
++{
++	char *port_type;
++	char port_dev[20];
++
++	switch (hso_dev->port_spec & HSO_PORT_MASK) {
++	case HSO_PORT_CONTROL:
++		port_type = "Control";
++		break;
++	case HSO_PORT_APP:
++		port_type = "Application";
++		break;
++	case HSO_PORT_GPS:
++		port_type = "GPS";
++		break;
++	case HSO_PORT_GPS_CONTROL:
++		port_type = "GPS control";
++		break;
++	case HSO_PORT_APP2:
++		port_type = "Application2";
++		break;
++	case HSO_PORT_PCSC:
++		port_type = "PCSC";
++		break;
++	case HSO_PORT_DIAG:
++		port_type = "Diagnostic";
++		break;
++	case HSO_PORT_DIAG2:
++		port_type = "Diagnostic2";
++		break;
++	case HSO_PORT_MODEM:
++		port_type = "Modem";
++		break;
++	case HSO_PORT_NETWORK:
++		port_type = "Network";
++		break;
++	default:
++		port_type = "Unknown";
++		break;
++	}
++	if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
++		sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
++	} else
++		sprintf(port_dev, "/dev/%s%d", tty_filename,
++			dev2ser(hso_dev)->minor);
++
++	dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
++		port_type, port_dev);
++}
++
++static int hso_start_net_device(struct hso_device *hso_dev)
++{
++	int i, result = 0;
++	struct hso_net *hso_net = dev2net(hso_dev);
++
++	if (!hso_net)
++		return -ENODEV;
++
++	/* send URBs for all read buffers */
++	for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
++
++		/* Prep a receive URB */
++		usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
++				  hso_dev->usb,
++				  usb_rcvbulkpipe(hso_dev->usb,
++						  hso_net->in_endp->
++						  bEndpointAddress & 0x7F),
++				  hso_net->mux_bulk_rx_buf_pool[i],
++				  MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
++				  hso_net);
++
++		/* Put it out there so the device can send us stuff */
++		result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
++					GFP_NOIO);
++		if (result)
++			dev_warn(&hso_dev->usb->dev,
++				"%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
++				i, result);
++	}
++
++	return result;
++}
++
++static int hso_stop_net_device(struct hso_device *hso_dev)
++{
++	int i;
++	struct hso_net *hso_net = dev2net(hso_dev);
++
++	if (!hso_net)
++		return -ENODEV;
++
++	for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
++		if (hso_net->mux_bulk_rx_urb_pool[i])
++			usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
++
++	}
++	if (hso_net->mux_bulk_tx_urb)
++		usb_kill_urb(hso_net->mux_bulk_tx_urb);
++
++	return 0;
++}
++
++static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
++{
++	int i, result = 0;
++	struct hso_serial *serial = dev2ser(hso_dev);
++
++	if (!serial)
++		return -ENODEV;
++
++	/* If it is not the MUX port fill in and submit a bulk urb (already
++	 * allocated in hso_serial_start) */
++	if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
++		for (i = 0; i < serial->num_rx_urbs; i++) {
++			usb_fill_bulk_urb(serial->rx_urb[i],
++					  serial->parent->usb,
++					  usb_rcvbulkpipe(serial->parent->usb,
++							  serial->in_endp->
++							  bEndpointAddress &
++							  0x7F),
++					  serial->rx_data[i],
++					  serial->rx_data_length,
++					  hso_std_serial_read_bulk_callback,
++					  serial);
++			result = usb_submit_urb(serial->rx_urb[i], flags);
++			if (result) {
++				dev_warn(&serial->parent->usb->dev,
++					 "Failed to submit urb - res %d\n",
++					 result);
++				break;
++			}
++		}
++	} else {
++		mutex_lock(&serial->shared_int->shared_int_lock);
++		if (!serial->shared_int->use_count) {
++			result =
++			    hso_mux_submit_intr_urb(serial->shared_int,
++						    hso_dev->usb, flags);
++		}
++		serial->shared_int->use_count++;
++		mutex_unlock(&serial->shared_int->shared_int_lock);
++	}
++
++	return result;
++}
++
++static int hso_stop_serial_device(struct hso_device *hso_dev)
++{
++	int i;
++	struct hso_serial *serial = dev2ser(hso_dev);
++
++	if (!serial)
++		return -ENODEV;
++
++	for (i = 0; i < serial->num_rx_urbs; i++) {
++		if (serial->rx_urb[i])
++				usb_kill_urb(serial->rx_urb[i]);
++	}
++
++	if (serial->tx_urb)
++		usb_kill_urb(serial->tx_urb);
++
++	if (serial->shared_int) {
++		mutex_lock(&serial->shared_int->shared_int_lock);
++		if (serial->shared_int->use_count &&
++		    (--serial->shared_int->use_count == 0)) {
++			struct urb *urb;
++
++			urb = serial->shared_int->shared_intr_urb;
++			if (urb)
++				usb_kill_urb(urb);
++		}
++		mutex_unlock(&serial->shared_int->shared_int_lock);
++	}
++
++	return 0;
++}
++
++static void hso_serial_common_free(struct hso_serial *serial)
++{
++	int i;
++
++	if (serial->parent->dev)
++		device_remove_file(serial->parent->dev, &dev_attr_hsotype);
++
++	tty_unregister_device(tty_drv, serial->minor);
++
++	for (i = 0; i < serial->num_rx_urbs; i++) {
++		/* unlink and free RX URB */
++		usb_free_urb(serial->rx_urb[i]);
++		/* free the RX buffer */
++		kfree(serial->rx_data[i]);
++	}
++
++	/* unlink and free TX URB */
++	usb_free_urb(serial->tx_urb);
++	kfree(serial->tx_data);
++}
++
++static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
++				    int rx_size, int tx_size)
++{
++	struct device *dev;
++	int minor;
++	int i;
++
++	minor = get_free_serial_index();
++	if (minor < 0)
++		goto exit;
++
++	/* register our minor number */
++	serial->parent->dev = tty_register_device(tty_drv, minor,
++					&serial->parent->interface->dev);
++	dev = serial->parent->dev;
++	dev->driver_data = serial->parent;
++	i = device_create_file(dev, &dev_attr_hsotype);
++
++	/* fill in specific data for later use */
++	serial->minor = minor;
++	serial->magic = HSO_SERIAL_MAGIC;
++	spin_lock_init(&serial->serial_lock);
++	serial->num_rx_urbs = num_urbs;
++
++	/* RX, allocate urb and initialize */
++
++	/* prepare our RX buffer */
++	serial->rx_data_length = rx_size;
++	for (i = 0; i < serial->num_rx_urbs; i++) {
++		serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
++		if (!serial->rx_urb[i]) {
++			dev_err(dev, "Could not allocate urb?\n");
++			goto exit;
++		}
++		serial->rx_urb[i]->transfer_buffer = NULL;
++		serial->rx_urb[i]->transfer_buffer_length = 0;
++		serial->rx_data[i] = kzalloc(serial->rx_data_length,
++					     GFP_KERNEL);
++		if (!serial->rx_data[i]) {
++			dev_err(dev, "%s - Out of memory\n", __func__);
++			goto exit;
++		}
++	}
++
++	/* TX, allocate urb and initialize */
++	serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
++	if (!serial->tx_urb) {
++		dev_err(dev, "Could not allocate urb?\n");
++		goto exit;
++	}
++	serial->tx_urb->transfer_buffer = NULL;
++	serial->tx_urb->transfer_buffer_length = 0;
++	/* prepare our TX buffer */
++	serial->tx_data_count = 0;
++	serial->tx_buffer_count = 0;
++	serial->tx_data_length = tx_size;
++	serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
++	if (!serial->tx_data) {
++		dev_err(dev, "%s - Out of memory", __func__);
++		goto exit;
++	}
++	serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
++	if (!serial->tx_buffer) {
++		dev_err(dev, "%s - Out of memory", __func__);
++		goto exit;
++	}
++
++	return 0;
++exit:
++	hso_serial_common_free(serial);
++	return -1;
++}
++
++/* Frees a general hso device */
++static void hso_free_device(struct hso_device *hso_dev)
++{
++	kfree(hso_dev);
++}
++
++/* Creates a general hso device */
++static struct hso_device *hso_create_device(struct usb_interface *intf,
++					    int port_spec)
++{
++	struct hso_device *hso_dev;
++
++	hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
++	if (!hso_dev)
++		return NULL;
++
++	hso_dev->port_spec = port_spec;
++	hso_dev->usb = interface_to_usbdev(intf);
++	hso_dev->interface = intf;
++	kref_init(&hso_dev->ref);
++	mutex_init(&hso_dev->mutex);
++
++	INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
++	INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
++
++	return hso_dev;
++}
++
++/* Removes a network device in the network device table */
++static int remove_net_device(struct hso_device *hso_dev)
++{
++	int i;
++
++	for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
++		if (network_table[i] == hso_dev) {
++			network_table[i] = NULL;
++			break;
++		}
++	}
++	if (i == HSO_MAX_NET_DEVICES)
++		return -1;
++	return 0;
++}
++
++/* Frees our network device */
++static void hso_free_net_device(struct hso_device *hso_dev)
++{
++	int i;
++	struct hso_net *hso_net = dev2net(hso_dev);
++
++	if (!hso_net)
++		return;
++
++	/* start freeing */
++	for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
++		usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
++		kfree(hso_net->mux_bulk_rx_buf_pool[i]);
++	}
++	usb_free_urb(hso_net->mux_bulk_tx_urb);
++	kfree(hso_net->mux_bulk_tx_buf);
++
++	remove_net_device(hso_net->parent);
++
++	if (hso_net->net) {
++		unregister_netdev(hso_net->net);
++		free_netdev(hso_net->net);
++	}
++
++	hso_free_device(hso_dev);
++}
++
++/* initialize the network interface */
++static void hso_net_init(struct net_device *net)
++{
++	struct hso_net *hso_net = netdev_priv(net);
++
++	D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
++
++	/* fill in the other fields */
++	net->open = hso_net_open;
++	net->stop = hso_net_close;
++	net->hard_start_xmit = hso_net_start_xmit;
++	net->tx_timeout = hso_net_tx_timeout;
++	net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
++	net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
++	net->type = ARPHRD_NONE;
++	net->mtu = DEFAULT_MTU - 14;
++	net->tx_queue_len = 10;
++	SET_ETHTOOL_OPS(net, &ops);
++
++	/* and initialize the semaphore */
++	spin_lock_init(&hso_net->net_lock);
++}
++
++/* Adds a network device in the network device table */
++static int add_net_device(struct hso_device *hso_dev)
++{
++	int i;
++
++	for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
++		if (network_table[i] == NULL) {
++			network_table[i] = hso_dev;
++			break;
++		}
++	}
++	if (i == HSO_MAX_NET_DEVICES)
++		return -1;
++	return 0;
++}
++
++static int hso_radio_toggle(void *data, enum rfkill_state state)
++{
++	struct hso_device *hso_dev = data;
++	int enabled = (state == RFKILL_STATE_ON);
++	int rv;
++
++	mutex_lock(&hso_dev->mutex);
++	if (hso_dev->usb_gone)
++		rv = 0;
++	else
++		rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
++				       enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
++				       USB_CTRL_SET_TIMEOUT);
++	mutex_unlock(&hso_dev->mutex);
++	return rv;
++}
++
++/* Creates and sets up everything for rfkill */
++static void hso_create_rfkill(struct hso_device *hso_dev,
++			     struct usb_interface *interface)
++{
++	struct hso_net *hso_net = dev2net(hso_dev);
++	struct device *dev = hso_dev->dev;
++	char *rfkn;
++
++	hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
++				 RFKILL_TYPE_WLAN);
++	if (!hso_net->rfkill) {
++		dev_err(dev, "%s - Out of memory", __func__);
++		return;
++	}
++	rfkn = kzalloc(20, GFP_KERNEL);
++	if (!rfkn) {
++		rfkill_free(hso_net->rfkill);
++		dev_err(dev, "%s - Out of memory", __func__);
++		return;
++	}
++	snprintf(rfkn, 20, "hso-%d",
++		 interface->altsetting->desc.bInterfaceNumber);
++	hso_net->rfkill->name = rfkn;
++	hso_net->rfkill->state = RFKILL_STATE_ON;
++	hso_net->rfkill->data = hso_dev;
++	hso_net->rfkill->toggle_radio = hso_radio_toggle;
++	if (rfkill_register(hso_net->rfkill) < 0) {
++		kfree(rfkn);
++		hso_net->rfkill->name = NULL;
++		rfkill_free(hso_net->rfkill);
++		dev_err(dev, "%s - Failed to register rfkill", __func__);
++		return;
++	}
++}
++
++/* Creates our network device */
++static struct hso_device *hso_create_net_device(struct usb_interface *interface)
++{
++	int result, i;
++	struct net_device *net;
++	struct hso_net *hso_net;
++	struct hso_device *hso_dev;
++
++	hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
++	if (!hso_dev)
++		return NULL;
++
++	/* allocate our network device, then we can put in our private data */
++	/* call hso_net_init to do the basic initialization */
++	net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
++	if (!net) {
++		dev_err(&interface->dev, "Unable to create ethernet device\n");
++		goto exit;
++	}
++
++	hso_net = netdev_priv(net);
++
++	hso_dev->port_data.dev_net = hso_net;
++	hso_net->net = net;
++	hso_net->parent = hso_dev;
++
++	hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
++				      USB_DIR_IN);
++	if (!hso_net->in_endp) {
++		dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
++		goto exit;
++	}
++	hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
++				       USB_DIR_OUT);
++	if (!hso_net->out_endp) {
++		dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
++		goto exit;
++	}
++	SET_NETDEV_DEV(net, &interface->dev);
++
++	/* registering our net device */
++	result = register_netdev(net);
++	if (result) {
++		dev_err(&interface->dev, "Failed to register device\n");
++		goto exit;
++	}
++
++	/* start allocating */
++	for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
++		hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
++		if (!hso_net->mux_bulk_rx_urb_pool[i]) {
++			dev_err(&interface->dev, "Could not allocate rx urb\n");
++			goto exit;
++		}
++		hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
++							   GFP_KERNEL);
++		if (!hso_net->mux_bulk_rx_buf_pool[i]) {
++			dev_err(&interface->dev, "Could not allocate rx buf\n");
++			goto exit;
++		}
++	}
++	hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
++	if (!hso_net->mux_bulk_tx_urb) {
++		dev_err(&interface->dev, "Could not allocate tx urb\n");
++		goto exit;
++	}
++	hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
++	if (!hso_net->mux_bulk_tx_buf) {
++		dev_err(&interface->dev, "Could not allocate tx buf\n");
++		goto exit;
++	}
++
++	add_net_device(hso_dev);
++
++	hso_log_port(hso_dev);
++
++	hso_create_rfkill(hso_dev, interface);
++
++	return hso_dev;
++exit:
++	hso_free_net_device(hso_dev);
++	return NULL;
++}
++
++/* Frees an AT channel ( goes for both mux and non-mux ) */
++static void hso_free_serial_device(struct hso_device *hso_dev)
++{
++	struct hso_serial *serial = dev2ser(hso_dev);
++
++	if (!serial)
++		return;
++	set_serial_by_index(serial->minor, NULL);
++
++	hso_serial_common_free(serial);
++
++	if (serial->shared_int) {
++		mutex_lock(&serial->shared_int->shared_int_lock);
++		if (--serial->shared_int->ref_count == 0)
++			hso_free_shared_int(serial->shared_int);
++		else
++			mutex_unlock(&serial->shared_int->shared_int_lock);
++	}
++	kfree(serial);
++	hso_free_device(hso_dev);
++}
++
++/* Creates a bulk AT channel */
++static struct hso_device *hso_create_bulk_serial_device(
++			struct usb_interface *interface, int port)
++{
++	struct hso_device *hso_dev;
++	struct hso_serial *serial;
++	int num_urbs;
++
++	hso_dev = hso_create_device(interface, port);
++	if (!hso_dev)
++		return NULL;
++
++	serial = kzalloc(sizeof(*serial), GFP_KERNEL);
++	if (!serial)
++		goto exit;
++
++	serial->parent = hso_dev;
++	hso_dev->port_data.dev_serial = serial;
++
++	if (port & HSO_PORT_MODEM)
++		num_urbs = 2;
++	else
++		num_urbs = 1;
++
++	if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
++				     BULK_URB_TX_SIZE))
++		goto exit;
++
++	serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
++				     USB_DIR_IN);
++	if (!serial->in_endp) {
++		dev_err(&interface->dev, "Failed to find BULK IN ep\n");
++		goto exit;
++	}
++
++	if (!
++	    (serial->out_endp =
++	     hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
++		dev_err(&interface->dev, "Failed to find BULK IN ep\n");
++		goto exit;
++	}
++
++	serial->write_data = hso_std_serial_write_data;
++
++	/* and record this serial */
++	set_serial_by_index(serial->minor, serial);
++
++	/* setup the proc dirs and files if needed */
++	hso_log_port(hso_dev);
++
++	/* done, return it */
++	return hso_dev;
++exit:
++	if (hso_dev && serial)
++		hso_serial_common_free(serial);
++	kfree(serial);
++	hso_free_device(hso_dev);
++	return NULL;
++}
++
++/* Creates a multiplexed AT channel */
++static
++struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
++						int port,
++						struct hso_shared_int *mux)
++{
++	struct hso_device *hso_dev;
++	struct hso_serial *serial;
++	int port_spec;
++
++	port_spec = HSO_INTF_MUX;
++	port_spec &= ~HSO_PORT_MASK;
++
++	port_spec |= hso_mux_to_port(port);
++	if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
++		return NULL;
++
++	hso_dev = hso_create_device(interface, port_spec);
++	if (!hso_dev)
++		return NULL;
++
++	serial = kzalloc(sizeof(*serial), GFP_KERNEL);
++	if (!serial)
++		goto exit;
++
++	hso_dev->port_data.dev_serial = serial;
++	serial->parent = hso_dev;
++
++	if (hso_serial_common_create
++	    (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
++		goto exit;
++
++	serial->tx_data_length--;
++	serial->write_data = hso_mux_serial_write_data;
++
++	serial->shared_int = mux;
++	mutex_lock(&serial->shared_int->shared_int_lock);
++	serial->shared_int->ref_count++;
++	mutex_unlock(&serial->shared_int->shared_int_lock);
++
++	/* and record this serial */
++	set_serial_by_index(serial->minor, serial);
++
++	/* setup the proc dirs and files if needed */
++	hso_log_port(hso_dev);
++
++	/* done, return it */
++	return hso_dev;
++
++exit:
++	if (serial) {
++		tty_unregister_device(tty_drv, serial->minor);
++		kfree(serial);
++	}
++	if (hso_dev)
++		hso_free_device(hso_dev);
++	return NULL;
++
++}
++
++static void hso_free_shared_int(struct hso_shared_int *mux)
++{
++	usb_free_urb(mux->shared_intr_urb);
++	kfree(mux->shared_intr_buf);
++	mutex_unlock(&mux->shared_int_lock);
++	kfree(mux);
++}
++
++static
++struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
++{
++	struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
++
++	if (!mux)
++		return NULL;
++
++	mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
++				    USB_DIR_IN);
++	if (!mux->intr_endp) {
++		dev_err(&interface->dev, "Can't find INT IN endpoint\n");
++		goto exit;
++	}
++
++	mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
++	if (!mux->shared_intr_urb) {
++		dev_err(&interface->dev, "Could not allocate intr urb?");
++		goto exit;
++	}
++	mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
++				       GFP_KERNEL);
++	if (!mux->shared_intr_buf) {
++		dev_err(&interface->dev, "Could not allocate intr buf?");
++		goto exit;
++	}
++
++	mutex_init(&mux->shared_int_lock);
++
++	return mux;
++
++exit:
++	kfree(mux->shared_intr_buf);
++	usb_free_urb(mux->shared_intr_urb);
++	kfree(mux);
++	return NULL;
++}
++
++/* Gets the port spec for a certain interface */
++static int hso_get_config_data(struct usb_interface *interface)
++{
++	struct usb_device *usbdev = interface_to_usbdev(interface);
++	u8 config_data[17];
++	u32 if_num = interface->altsetting->desc.bInterfaceNumber;
++	s32 result;
++
++	if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
++			    0x86, 0xC0, 0, 0, config_data, 17,
++			    USB_CTRL_SET_TIMEOUT) != 0x11) {
++		return -EIO;
++	}
++
++	switch (config_data[if_num]) {
++	case 0x0:
++		result = 0;
++		break;
++	case 0x1:
++		result = HSO_PORT_DIAG;
++		break;
++	case 0x2:
++		result = HSO_PORT_GPS;
++		break;
++	case 0x3:
++		result = HSO_PORT_GPS_CONTROL;
++		break;
++	case 0x4:
++		result = HSO_PORT_APP;
++		break;
++	case 0x5:
++		result = HSO_PORT_APP2;
++		break;
++	case 0x6:
++		result = HSO_PORT_CONTROL;
++		break;
++	case 0x7:
++		result = HSO_PORT_NETWORK;
++		break;
++	case 0x8:
++		result = HSO_PORT_MODEM;
++		break;
++	case 0x9:
++		result = HSO_PORT_MSD;
++		break;
++	case 0xa:
++		result = HSO_PORT_PCSC;
++		break;
++	case 0xb:
++		result = HSO_PORT_VOICE;
++		break;
++	default:
++		result = 0;
++	}
++
++	if (result)
++		result |= HSO_INTF_BULK;
++
++	if (config_data[16] & 0x1)
++		result |= HSO_INFO_CRC_BUG;
++
++	return result;
++}
++
++/* called once for each interface upon device insertion */
++static int hso_probe(struct usb_interface *interface,
++		     const struct usb_device_id *id)
++{
++	int mux, i, if_num, port_spec;
++	unsigned char port_mask;
++	struct hso_device *hso_dev = NULL;
++	struct hso_shared_int *shared_int;
++	struct hso_device *tmp_dev = NULL;
++
++	if_num = interface->altsetting->desc.bInterfaceNumber;
++
++	/* Get the interface/port specification from either driver_info or from
++	 * the device itself */
++	if (id->driver_info)
++		port_spec = ((u32 *)(id->driver_info))[if_num];
++	else
++		port_spec = hso_get_config_data(interface);
++
++	if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
++		dev_err(&interface->dev, "Not our interface\n");
++		return -ENODEV;
++	}
++	/* Check if we need to switch to alt interfaces prior to port
++	 * configuration */
++	if (interface->num_altsetting > 1)
++		usb_set_interface(interface_to_usbdev(interface), if_num, 1);
++	interface->needs_remote_wakeup = 1;
++
++	/* Allocate new hso device(s) */
++	switch (port_spec & HSO_INTF_MASK) {
++	case HSO_INTF_MUX:
++		if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
++			/* Create the network device */
++			if (!disable_net) {
++				hso_dev = hso_create_net_device(interface);
++				if (!hso_dev)
++					goto exit;
++				tmp_dev = hso_dev;
++			}
++		}
++
++		if (hso_get_mux_ports(interface, &port_mask))
++			/* TODO: de-allocate everything */
++			goto exit;
++
++		shared_int = hso_create_shared_int(interface);
++		if (!shared_int)
++			goto exit;
++
++		for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
++			if (port_mask & i) {
++				hso_dev = hso_create_mux_serial_device(
++						interface, i, shared_int);
++				if (!hso_dev)
++					goto exit;
++			}
++		}
++
++		if (tmp_dev)
++			hso_dev = tmp_dev;
++		break;
++
++	case HSO_INTF_BULK:
++		/* It's a regular bulk interface */
++		if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
++		    && !disable_net)
++			hso_dev = hso_create_net_device(interface);
++		else
++			hso_dev =
++			    hso_create_bulk_serial_device(interface, port_spec);
++		if (!hso_dev)
++			goto exit;
++		break;
++	default:
++		goto exit;
++	}
++
++	usb_driver_claim_interface(&hso_driver, interface, hso_dev);
++
++	/* save our data pointer in this device */
++	usb_set_intfdata(interface, hso_dev);
++
++	/* done */
++	return 0;
++exit:
++	hso_free_interface(interface);
++	return -ENODEV;
++}
++
++/* device removed, cleaning up */
++static void hso_disconnect(struct usb_interface *interface)
++{
++	hso_free_interface(interface);
++
++	/* remove reference of our private data */
++	usb_set_intfdata(interface, NULL);
++
++	usb_driver_release_interface(&hso_driver, interface);
++}
++
++static void async_get_intf(struct work_struct *data)
++{
++	struct hso_device *hso_dev =
++	    container_of(data, struct hso_device, async_get_intf);
++	usb_autopm_get_interface(hso_dev->interface);
++}
++
++static void async_put_intf(struct work_struct *data)
++{
++	struct hso_device *hso_dev =
++	    container_of(data, struct hso_device, async_put_intf);
++	usb_autopm_put_interface(hso_dev->interface);
++}
++
++static int hso_get_activity(struct hso_device *hso_dev)
++{
++	if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
++		if (!hso_dev->is_active) {
++			hso_dev->is_active = 1;
++			schedule_work(&hso_dev->async_get_intf);
++		}
++	}
++
++	if (hso_dev->usb->state != USB_STATE_CONFIGURED)
++		return -EAGAIN;
++
++	usb_mark_last_busy(hso_dev->usb);
++
++	return 0;
++}
++
++static int hso_put_activity(struct hso_device *hso_dev)
++{
++	if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
++		if (hso_dev->is_active) {
++			hso_dev->is_active = 0;
++			schedule_work(&hso_dev->async_put_intf);
++			return -EAGAIN;
++		}
++	}
++	hso_dev->is_active = 0;
++	return 0;
++}
++
++/* called by kernel when we need to suspend device */
++static int hso_suspend(struct usb_interface *iface, pm_message_t message)
++{
++	int i, result;
++
++	/* Stop all serial ports */
++	for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
++		if (serial_table[i] && (serial_table[i]->interface == iface)) {
++			result = hso_stop_serial_device(serial_table[i]);
++			if (result)
++				goto out;
++		}
++	}
++
++	/* Stop all network ports */
++	for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
++		if (network_table[i] &&
++		    (network_table[i]->interface == iface)) {
++			result = hso_stop_net_device(network_table[i]);
++			if (result)
++				goto out;
++		}
++	}
++
++out:
++	return 0;
++}
++
++/* called by kernel when we need to resume device */
++static int hso_resume(struct usb_interface *iface)
++{
++	int i, result = 0;
++	struct hso_net *hso_net;
++
++	/* Start all serial ports */
++	for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
++		if (serial_table[i] && (serial_table[i]->interface == iface)) {
++			if (dev2ser(serial_table[i])->open_count) {
++				result =
++				    hso_start_serial_device(serial_table[i], GFP_NOIO);
++				hso_kick_transmit(dev2ser(serial_table[i]));
++				if (result)
++					goto out;
++			}
++		}
++	}
++
++	/* Start all network ports */
++	for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
++		if (network_table[i] &&
++		    (network_table[i]->interface == iface)) {
++			hso_net = dev2net(network_table[i]);
++			/* First transmit any lingering data, then restart the
++			 * device. */
++			if (hso_net->skb_tx_buf) {
++				dev_dbg(&iface->dev,
++					"Transmitting lingering data\n");
++				hso_net_start_xmit(hso_net->skb_tx_buf,
++						   hso_net->net);
++			}
++			result = hso_start_net_device(network_table[i]);
++			if (result)
++				goto out;
++		}
++	}
++
++out:
++	return result;
++}
++
++static void hso_serial_ref_free(struct kref *ref)
++{
++	struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
++
++	hso_free_serial_device(hso_dev);
++}
++
++static void hso_free_interface(struct usb_interface *interface)
++{
++	struct hso_serial *hso_dev;
++	int i;
++
++	for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
++		if (serial_table[i]
++		    && (serial_table[i]->interface == interface)) {
++			hso_dev = dev2ser(serial_table[i]);
++			if (hso_dev->tty)
++				tty_hangup(hso_dev->tty);
++			mutex_lock(&hso_dev->parent->mutex);
++			hso_dev->parent->usb_gone = 1;
++			mutex_unlock(&hso_dev->parent->mutex);
++			kref_put(&serial_table[i]->ref, hso_serial_ref_free);
++		}
++	}
++
++	for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
++		if (network_table[i]
++		    && (network_table[i]->interface == interface)) {
++			struct rfkill *rfk = dev2net(network_table[i])->rfkill;
++			/* hso_stop_net_device doesn't stop the net queue since
++			 * traffic needs to start it again when suspended */
++			netif_stop_queue(dev2net(network_table[i])->net);
++			hso_stop_net_device(network_table[i]);
++			cancel_work_sync(&network_table[i]->async_put_intf);
++			cancel_work_sync(&network_table[i]->async_get_intf);
++			if(rfk)
++				rfkill_unregister(rfk);
++			hso_free_net_device(network_table[i]);
++		}
++	}
++}
++
++/* Helper functions */
++
++/* Get the endpoint ! */
++static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
++						  int type, int dir)
++{
++	int i;
++	struct usb_host_interface *iface = intf->cur_altsetting;
++	struct usb_endpoint_descriptor *endp;
++
++	for (i = 0; i < iface->desc.bNumEndpoints; i++) {
++		endp = &iface->endpoint[i].desc;
++		if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
++		    ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == type))
++			return endp;
++	}
++
++	return NULL;
++}
++
++/* Get the byte that describes which ports are enabled */
++static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
++{
++	int i;
++	struct usb_host_interface *iface = intf->cur_altsetting;
++
++	if (iface->extralen == 3) {
++		*ports = iface->extra[2];
++		return 0;
++	}
++
++	for (i = 0; i < iface->desc.bNumEndpoints; i++) {
++		if (iface->endpoint[i].extralen == 3) {
++			*ports = iface->endpoint[i].extra[2];
++			return 0;
++		}
++	}
++
++	return -1;
++}
++
++/* interrupt urb needs to be submitted, used for serial read of muxed port */
++static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
++				   struct usb_device *usb, gfp_t gfp)
++{
++	int result;
++
++	usb_fill_int_urb(shared_int->shared_intr_urb, usb,
++			 usb_rcvintpipe(usb,
++				shared_int->intr_endp->bEndpointAddress & 0x7F),
++			 shared_int->shared_intr_buf,
++			 shared_int->intr_endp->wMaxPacketSize,
++			 intr_callback, shared_int,
++			 shared_int->intr_endp->bInterval);
++
++	result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
++	if (result)
++		dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
++			result);
++
++	return result;
++}
++
++/* operations setup of the serial interface */
++static struct tty_operations hso_serial_ops = {
++	.open = hso_serial_open,
++	.close = hso_serial_close,
++	.write = hso_serial_write,
++	.write_room = hso_serial_write_room,
++	.set_termios = hso_serial_set_termios,
++	.chars_in_buffer = hso_serial_chars_in_buffer,
++	.tiocmget = hso_serial_tiocmget,
++	.tiocmset = hso_serial_tiocmset,
++};
++
++static struct usb_driver hso_driver = {
++	.name = driver_name,
++	.probe = hso_probe,
++	.disconnect = hso_disconnect,
++	.id_table = hso_ids,
++	.suspend = hso_suspend,
++	.resume = hso_resume,
++	.supports_autosuspend = 1,
++};
++
++static int __init hso_init(void)
++{
++	int i;
++	int result;
++
++	/* put it in the log */
++	printk(KERN_INFO "hso: %s\n", version);
++
++	/* Initialise the serial table semaphore and table */
++	spin_lock_init(&serial_table_lock);
++	for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
++		serial_table[i] = NULL;
++
++	/* allocate our driver using the proper amount of supported minors */
++	tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
++	if (!tty_drv)
++		return -ENOMEM;
++
++	/* fill in all needed values */
++	tty_drv->magic = TTY_DRIVER_MAGIC;
++	tty_drv->owner = THIS_MODULE;
++	tty_drv->driver_name = driver_name;
++	tty_drv->name = tty_filename;
++
++	/* if major number is provided as parameter, use that one */
++	if (tty_major)
++		tty_drv->major = tty_major;
++
++	tty_drv->minor_start = 0;
++	tty_drv->num = HSO_SERIAL_TTY_MINORS;
++	tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
++	tty_drv->subtype = SERIAL_TYPE_NORMAL;
++	tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
++	tty_drv->init_termios = tty_std_termios;
++	tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
++	tty_drv->termios = hso_serial_termios;
++	tty_drv->termios_locked = hso_serial_termios_locked;
++	tty_set_operations(tty_drv, &hso_serial_ops);
++
++	/* register the tty driver */
++	result = tty_register_driver(tty_drv);
++	if (result) {
++		printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
++			__func__, result);
++		return result;
++	}
++
++	/* register this module as an usb driver */
++	result = usb_register(&hso_driver);
++	if (result) {
++		printk(KERN_ERR "Could not register hso driver? error: %d\n",
++			result);
++		/* cleanup serial interface */
++		tty_unregister_driver(tty_drv);
++		return result;
++	}
++
++	/* done */
++	return 0;
++}
++
++static void __exit hso_exit(void)
++{
++	printk(KERN_INFO "hso: unloaded\n");
++
++	tty_unregister_driver(tty_drv);
++	/* deregister the usb driver */
++	usb_deregister(&hso_driver);
++}
++
++/* Module definitions */
++module_init(hso_init);
++module_exit(hso_exit);
++
++MODULE_AUTHOR(MOD_AUTHOR);
++MODULE_DESCRIPTION(MOD_DESCRIPTION);
++MODULE_LICENSE(MOD_LICENSE);
++MODULE_INFO(Version, DRIVER_VERSION);
++
++/* change the debug level (eg: insmod hso.ko debug=0x04) */
++MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
++module_param(debug, int, S_IRUGO | S_IWUSR);
++
++/* set the major tty number (eg: insmod hso.ko tty_major=245) */
++MODULE_PARM_DESC(tty_major, "Set the major tty number");
++module_param(tty_major, int, S_IRUGO | S_IWUSR);
++
++/* disable network interface (eg: insmod hso.ko disable_net=1) */
++MODULE_PARM_DESC(disable_net, "Disable the network interface");
++module_param(disable_net, int, S_IRUGO | S_IWUSR);