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linux/drivers/usb/serial/kobil_sct.c

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/*
* KOBIL USB Smart Card Terminal Driver
*
* Copyright (C) 2002 KOBIL Systems GmbH
* Author: Thomas Wahrenbruch
*
* Contact: linuxusb@kobil.de
*
* This program is largely derived from work by the linux-usb group
* and associated source files. Please see the usb/serial files for
* individual credits and copyrights.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and
* patience.
*
* Supported readers: USB TWIN, KAAN Standard Plus and SecOVID Reader Plus
* (Adapter K), B1 Professional and KAAN Professional (Adapter B)
*
* (21/05/2004) tw
* Fix bug with P'n'P readers
*
* (28/05/2003) tw
* Add support for KAAN SIM
*
* (12/09/2002) tw
* Adapted to 2.5.
*
* (11/08/2002) tw
* Initial version.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/ioctl.h>
#include "kobil_sct.h"
static int debug;
/* Version Information */
#define DRIVER_VERSION "21/05/2004"
#define DRIVER_AUTHOR "KOBIL Systems GmbH - http://www.kobil.com"
#define DRIVER_DESC "KOBIL USB Smart Card Terminal Driver (experimental)"
#define KOBIL_VENDOR_ID 0x0D46
#define KOBIL_ADAPTER_B_PRODUCT_ID 0x2011
#define KOBIL_ADAPTER_K_PRODUCT_ID 0x2012
#define KOBIL_USBTWIN_PRODUCT_ID 0x0078
#define KOBIL_KAAN_SIM_PRODUCT_ID 0x0081
#define KOBIL_TIMEOUT 500
#define KOBIL_BUF_LENGTH 300
/* Function prototypes */
static int kobil_startup(struct usb_serial *serial);
static void kobil_shutdown(struct usb_serial *serial);
static int kobil_open(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp);
static void kobil_close(struct tty_struct *tty, struct usb_serial_port *port,
struct file *filp);
static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
const unsigned char *buf, int count);
static int kobil_write_room(struct tty_struct *tty);
static int kobil_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg);
static int kobil_tiocmget(struct tty_struct *tty, struct file *file);
static int kobil_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
static void kobil_read_int_callback(struct urb *urb);
static void kobil_write_callback(struct urb *purb);
static void kobil_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old);
static struct usb_device_id id_table [] = {
{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_B_PRODUCT_ID) },
{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_K_PRODUCT_ID) },
{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_USBTWIN_PRODUCT_ID) },
{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_KAAN_SIM_PRODUCT_ID) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, id_table);
static struct usb_driver kobil_driver = {
.name = "kobil",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table,
.no_dynamic_id = 1,
};
static struct usb_serial_driver kobil_device = {
.driver = {
.owner = THIS_MODULE,
.name = "kobil",
},
.description = "KOBIL USB smart card terminal",
.usb_driver = &kobil_driver,
.id_table = id_table,
.num_ports = 1,
.attach = kobil_startup,
.shutdown = kobil_shutdown,
.ioctl = kobil_ioctl,
.set_termios = kobil_set_termios,
.tiocmget = kobil_tiocmget,
.tiocmset = kobil_tiocmset,
.open = kobil_open,
.close = kobil_close,
.write = kobil_write,
.write_room = kobil_write_room,
.read_int_callback = kobil_read_int_callback,
};
struct kobil_private {
int write_int_endpoint_address;
int read_int_endpoint_address;
unsigned char buf[KOBIL_BUF_LENGTH]; /* buffer for the APDU to send */
int filled; /* index of the last char in buf */
int cur_pos; /* index of the next char to send in buf */
__u16 device_type;
};
static int kobil_startup(struct usb_serial *serial)
{
int i;
struct kobil_private *priv;
struct usb_device *pdev;
struct usb_host_config *actconfig;
struct usb_interface *interface;
struct usb_host_interface *altsetting;
struct usb_host_endpoint *endpoint;
priv = kmalloc(sizeof(struct kobil_private), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->filled = 0;
priv->cur_pos = 0;
priv->device_type = le16_to_cpu(serial->dev->descriptor.idProduct);
switch (priv->device_type) {
case KOBIL_ADAPTER_B_PRODUCT_ID:
printk(KERN_DEBUG "KOBIL B1 PRO / KAAN PRO detected\n");
break;
case KOBIL_ADAPTER_K_PRODUCT_ID:
printk(KERN_DEBUG
"KOBIL KAAN Standard Plus / SecOVID Reader Plus detected\n");
break;
case KOBIL_USBTWIN_PRODUCT_ID:
printk(KERN_DEBUG "KOBIL USBTWIN detected\n");
break;
case KOBIL_KAAN_SIM_PRODUCT_ID:
printk(KERN_DEBUG "KOBIL KAAN SIM detected\n");
break;
}
usb_set_serial_port_data(serial->port[0], priv);
/* search for the necessary endpoints */
pdev = serial->dev;
actconfig = pdev->actconfig;
interface = actconfig->interface[0];
altsetting = interface->cur_altsetting;
endpoint = altsetting->endpoint;
for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
endpoint = &altsetting->endpoint[i];
if (usb_endpoint_is_int_out(&endpoint->desc)) {
dbg("%s Found interrupt out endpoint. Address: %d",
__func__, endpoint->desc.bEndpointAddress);
priv->write_int_endpoint_address =
endpoint->desc.bEndpointAddress;
}
if (usb_endpoint_is_int_in(&endpoint->desc)) {
dbg("%s Found interrupt in endpoint. Address: %d",
__func__, endpoint->desc.bEndpointAddress);
priv->read_int_endpoint_address =
endpoint->desc.bEndpointAddress;
}
}
return 0;
}
static void kobil_shutdown(struct usb_serial *serial)
{
int i;
dbg("%s - port %d", __func__, serial->port[0]->number);
for (i = 0; i < serial->num_ports; ++i) {
while (serial->port[i]->port.count > 0)
kobil_close(NULL, serial->port[i], NULL);
kfree(usb_get_serial_port_data(serial->port[i]));
usb_set_serial_port_data(serial->port[i], NULL);
}
}
static int kobil_open(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp)
{
int result = 0;
struct kobil_private *priv;
unsigned char *transfer_buffer;
int transfer_buffer_length = 8;
int write_urb_transfer_buffer_length = 8;
dbg("%s - port %d", __func__, port->number);
priv = usb_get_serial_port_data(port);
/* someone sets the dev to 0 if the close method has been called */
port->interrupt_in_urb->dev = port->serial->dev;
/* force low_latency on so that our tty_push actually forces
* the data through, otherwise it is scheduled, and with high
* data rates (like with OHCI) data can get lost.
*/
if (tty) {
tty->low_latency = 1;
/* Default to echo off and other sane device settings */
tty->termios->c_lflag = 0;
tty->termios->c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN |
XCASE);
tty->termios->c_iflag = IGNBRK | IGNPAR | IXOFF;
/* do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D) */
tty->termios->c_oflag &= ~ONLCR;
}
/* allocate memory for transfer buffer */
transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
if (!transfer_buffer)
return -ENOMEM;
/* allocate write_urb */
if (!port->write_urb) {
dbg("%s - port %d Allocating port->write_urb",
__func__, port->number);
port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!port->write_urb) {
dbg("%s - port %d usb_alloc_urb failed",
__func__, port->number);
kfree(transfer_buffer);
return -ENOMEM;
}
}
/* allocate memory for write_urb transfer buffer */
port->write_urb->transfer_buffer =
kmalloc(write_urb_transfer_buffer_length, GFP_KERNEL);
if (!port->write_urb->transfer_buffer) {
kfree(transfer_buffer);
usb_free_urb(port->write_urb);
port->write_urb = NULL;
return -ENOMEM;
}
/* get hardware version */
result = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
SUSBCRequest_GetMisc,
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
SUSBCR_MSC_GetHWVersion,
0,
transfer_buffer,
transfer_buffer_length,
KOBIL_TIMEOUT
);
dbg("%s - port %d Send get_HW_version URB returns: %i",
__func__, port->number, result);
dbg("Harware version: %i.%i.%i",
transfer_buffer[0], transfer_buffer[1], transfer_buffer[2]);
/* get firmware version */
result = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
SUSBCRequest_GetMisc,
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
SUSBCR_MSC_GetFWVersion,
0,
transfer_buffer,
transfer_buffer_length,
KOBIL_TIMEOUT
);
dbg("%s - port %d Send get_FW_version URB returns: %i",
__func__, port->number, result);
dbg("Firmware version: %i.%i.%i",
transfer_buffer[0], transfer_buffer[1], transfer_buffer[2]);
if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
/* Setting Baudrate, Parity and Stopbits */
result = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
SUSBCRequest_SetBaudRateParityAndStopBits,
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity |
SUSBCR_SPASB_1StopBit,
0,
transfer_buffer,
0,
KOBIL_TIMEOUT
);
dbg("%s - port %d Send set_baudrate URB returns: %i",
__func__, port->number, result);
/* reset all queues */
result = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
SUSBCRequest_Misc,
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
SUSBCR_MSC_ResetAllQueues,
0,
transfer_buffer,
0,
KOBIL_TIMEOUT
);
dbg("%s - port %d Send reset_all_queues URB returns: %i",
__func__, port->number, result);
}
if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
/* start reading (Adapter B 'cause PNP string) */
result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
dbg("%s - port %d Send read URB returns: %i",
__func__, port->number, result);
}
kfree(transfer_buffer);
return 0;
}
static void kobil_close(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp)
{
dbg("%s - port %d", __func__, port->number);
if (port->write_urb) {
usb_kill_urb(port->write_urb);
usb_free_urb(port->write_urb);
port->write_urb = NULL;
}
usb_kill_urb(port->interrupt_in_urb);
}
static void kobil_read_int_callback(struct urb *urb)
{
int result;
struct usb_serial_port *port = urb->context;
struct tty_struct *tty;
unsigned char *data = urb->transfer_buffer;
int status = urb->status;
/* char *dbg_data; */
dbg("%s - port %d", __func__, port->number);
if (status) {
dbg("%s - port %d Read int status not zero: %d",
__func__, port->number, status);
return;
}
tty = tty_port_tty_get(&port->port);
if (urb->actual_length) {
/* BEGIN DEBUG */
/*
dbg_data = kzalloc((3 * purb->actual_length + 10)
* sizeof(char), GFP_KERNEL);
if (! dbg_data) {
return;
}
for (i = 0; i < purb->actual_length; i++) {
sprintf(dbg_data +3*i, "%02X ", data[i]);
}
dbg(" <-- %s", dbg_data);
kfree(dbg_data);
*/
/* END DEBUG */
tty_buffer_request_room(tty, urb->actual_length);
tty_insert_flip_string(tty, data, urb->actual_length);
tty_flip_buffer_push(tty);
}
tty_kref_put(tty);
/* someone sets the dev to 0 if the close method has been called */
port->interrupt_in_urb->dev = port->serial->dev;
result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
dbg("%s - port %d Send read URB returns: %i",
__func__, port->number, result);
}
static void kobil_write_callback(struct urb *purb)
{
}
static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
const unsigned char *buf, int count)
{
int length = 0;
int result = 0;
int todo = 0;
struct kobil_private *priv;
if (count == 0) {
dbg("%s - port %d write request of 0 bytes",
__func__, port->number);
return 0;
}
priv = usb_get_serial_port_data(port);
if (count > (KOBIL_BUF_LENGTH - priv->filled)) {
dbg("%s - port %d Error: write request bigger than buffer size", __func__, port->number);
return -ENOMEM;
}
/* Copy data to buffer */
memcpy(priv->buf + priv->filled, buf, count);
usb_serial_debug_data(debug, &port->dev, __func__, count,
priv->buf + priv->filled);
priv->filled = priv->filled + count;
/* only send complete block. TWIN, KAAN SIM and adapter K
use the same protocol. */
if (((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) ||
((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4)))) {
/* stop reading (except TWIN and KAAN SIM) */
if ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID)
|| (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID))
usb_kill_urb(port->interrupt_in_urb);
todo = priv->filled - priv->cur_pos;
while (todo > 0) {
/* max 8 byte in one urb (endpoint size) */
length = (todo < 8) ? todo : 8;
/* copy data to transfer buffer */
memcpy(port->write_urb->transfer_buffer,
priv->buf + priv->cur_pos, length);
usb_fill_int_urb(port->write_urb,
port->serial->dev,
usb_sndintpipe(port->serial->dev,
priv->write_int_endpoint_address),
port->write_urb->transfer_buffer,
length,
kobil_write_callback,
port,
8
);
priv->cur_pos = priv->cur_pos + length;
result = usb_submit_urb(port->write_urb, GFP_NOIO);
dbg("%s - port %d Send write URB returns: %i",
__func__, port->number, result);
todo = priv->filled - priv->cur_pos;
if (todo > 0)
msleep(24);
}
priv->filled = 0;
priv->cur_pos = 0;
/* someone sets the dev to 0 if the close method
has been called */
port->interrupt_in_urb->dev = port->serial->dev;
/* start reading (except TWIN and KAAN SIM) */
if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
/* someone sets the dev to 0 if the close method has
been called */
port->interrupt_in_urb->dev = port->serial->dev;
result = usb_submit_urb(port->interrupt_in_urb,
GFP_NOIO);
dbg("%s - port %d Send read URB returns: %i",
__func__, port->number, result);
}
}
return count;
}
static int kobil_write_room(struct tty_struct *tty)
{
/* dbg("%s - port %d", __func__, port->number); */
/* FIXME */
return 8;
}
static int kobil_tiocmget(struct tty_struct *tty, struct file *file)
{
struct usb_serial_port *port = tty->driver_data;
struct kobil_private *priv;
int result;
unsigned char *transfer_buffer;
int transfer_buffer_length = 8;
priv = usb_get_serial_port_data(port);
if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID
|| priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
/* This device doesn't support ioctl calls */
return -EINVAL;
}
/* allocate memory for transfer buffer */
transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
if (!transfer_buffer)
return -ENOMEM;
result = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
SUSBCRequest_GetStatusLineState,
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
0,
0,
transfer_buffer,
transfer_buffer_length,
KOBIL_TIMEOUT);
dbg("%s - port %d Send get_status_line_state URB returns: %i. Statusline: %02x",
__func__, port->number, result, transfer_buffer[0]);
result = 0;
if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0)
result = TIOCM_DSR;
kfree(transfer_buffer);
return result;
}
static int kobil_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear)
{
struct usb_serial_port *port = tty->driver_data;
struct kobil_private *priv;
int result;
int dtr = 0;
int rts = 0;
unsigned char *transfer_buffer;
int transfer_buffer_length = 8;
/* FIXME: locking ? */
priv = usb_get_serial_port_data(port);
if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID
|| priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
/* This device doesn't support ioctl calls */
return -EINVAL;
}
/* allocate memory for transfer buffer */
transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
if (!transfer_buffer)
return -ENOMEM;
if (set & TIOCM_RTS)
rts = 1;
if (set & TIOCM_DTR)
dtr = 1;
if (clear & TIOCM_RTS)
rts = 0;
if (clear & TIOCM_DTR)
dtr = 0;
if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) {
if (dtr != 0)
dbg("%s - port %d Setting DTR",
__func__, port->number);
else
dbg("%s - port %d Clearing DTR",
__func__, port->number);
result = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
SUSBCRequest_SetStatusLinesOrQueues,
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR),
0,
transfer_buffer,
0,
KOBIL_TIMEOUT);
} else {
if (rts != 0)
dbg("%s - port %d Setting RTS",
__func__, port->number);
else
dbg("%s - port %d Clearing RTS",
__func__, port->number);
result = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
SUSBCRequest_SetStatusLinesOrQueues,
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS),
0,
transfer_buffer,
0,
KOBIL_TIMEOUT);
}
dbg("%s - port %d Send set_status_line URB returns: %i",
__func__, port->number, result);
kfree(transfer_buffer);
return (result < 0) ? result : 0;
}
static void kobil_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old)
{
struct kobil_private *priv;
int result;
unsigned short urb_val = 0;
int c_cflag = tty->termios->c_cflag;
speed_t speed;
void *settings;
priv = usb_get_serial_port_data(port);
if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
/* This device doesn't support ioctl calls */
*tty->termios = *old;
return;
}
speed = tty_get_baud_rate(tty);
switch (speed) {
case 1200:
urb_val = SUSBCR_SBR_1200;
break;
default:
speed = 9600;
case 9600:
urb_val = SUSBCR_SBR_9600;
break;
}
urb_val |= (c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits :
SUSBCR_SPASB_1StopBit;
settings = kzalloc(50, GFP_KERNEL);
if (!settings)
return;
sprintf(settings, "%d ", speed);
if (c_cflag & PARENB) {
if (c_cflag & PARODD) {
urb_val |= SUSBCR_SPASB_OddParity;
strcat(settings, "Odd Parity");
} else {
urb_val |= SUSBCR_SPASB_EvenParity;
strcat(settings, "Even Parity");
}
} else {
urb_val |= SUSBCR_SPASB_NoParity;
strcat(settings, "No Parity");
}
tty->termios->c_cflag &= ~CMSPAR;
tty_encode_baud_rate(tty, speed, speed);
result = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
SUSBCRequest_SetBaudRateParityAndStopBits,
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
urb_val,
0,
settings,
0,
KOBIL_TIMEOUT
);
kfree(settings);
}
static int kobil_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct usb_serial_port *port = tty->driver_data;
struct kobil_private *priv = usb_get_serial_port_data(port);
unsigned char *transfer_buffer;
int transfer_buffer_length = 8;
int result;
if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)
/* This device doesn't support ioctl calls */
return -ENOIOCTLCMD;
switch (cmd) {
case TCFLSH:
transfer_buffer = kmalloc(transfer_buffer_length, GFP_KERNEL);
if (!transfer_buffer)
return -ENOBUFS;
result = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
SUSBCRequest_Misc,
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
SUSBCR_MSC_ResetAllQueues,
0,
NULL, /* transfer_buffer, */
0,
KOBIL_TIMEOUT
);
dbg("%s - port %d Send reset_all_queues (FLUSH) URB returns: %i", __func__, port->number, result);
kfree(transfer_buffer);
return (result < 0) ? -EIO: 0;
default:
return -ENOIOCTLCMD;
}
}
static int __init kobil_init(void)
{
int retval;
retval = usb_serial_register(&kobil_device);
if (retval)
goto failed_usb_serial_register;
retval = usb_register(&kobil_driver);
if (retval)
goto failed_usb_register;
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
DRIVER_DESC "\n");
return 0;
failed_usb_register:
usb_serial_deregister(&kobil_device);
failed_usb_serial_register:
return retval;
}
static void __exit kobil_exit(void)
{
usb_deregister(&kobil_driver);
usb_serial_deregister(&kobil_device);
}
module_init(kobil_init);
module_exit(kobil_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
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