/*
* REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver
*
* Copyright (C) 2001 REINER SCT
* Author: Matthias Bruestle
*
* Contact: support@reiner-sct.com (see MAINTAINERS)
*
* 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.
*
* In case of problems, please write to the contact e-mail address
* mentioned above.
*
* Please note that later models of the cyberjack reader family are
* supported by a libusb-based userspace device driver.
*
* Homepage: http://www.reiner-sct.de/support/treiber_cyberjack.php#linux
*/
#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 <asm/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#define CYBERJACK_LOCAL_BUF_SIZE 32
static int debug;
/*
* Version Information
*/
#define DRIVER_VERSION "v1.01"
#define DRIVER_AUTHOR "Matthias Bruestle"
#define DRIVER_DESC "REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver"
#define CYBERJACK_VENDOR_ID 0x0C4B
#define CYBERJACK_PRODUCT_ID 0x0100
/* Function prototypes */
static int cyberjack_startup(struct usb_serial *serial);
static void cyberjack_shutdown(struct usb_serial *serial);
static int cyberjack_open(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp);
static void cyberjack_close(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp);
static int cyberjack_write(struct tty_struct *tty,
struct usb_serial_port *port, const unsigned char *buf, int count);
static int cyberjack_write_room( struct tty_struct *tty);
static void cyberjack_read_int_callback(struct urb *urb);
static void cyberjack_read_bulk_callback(struct urb *urb);
static void cyberjack_write_bulk_callback(struct urb *urb);
static struct usb_device_id id_table [] = {
{ USB_DEVICE(CYBERJACK_VENDOR_ID, CYBERJACK_PRODUCT_ID) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, id_table);
static struct usb_driver cyberjack_driver = {
.name = "cyberjack",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table,
.no_dynamic_id = 1,
};
static struct usb_serial_driver cyberjack_device = {
.driver = {
.owner = THIS_MODULE,
.name = "cyberjack",
},
.description = "Reiner SCT Cyberjack USB card reader",
.usb_driver = &cyberjack_driver,
.id_table = id_table,
.num_ports = 1,
.attach = cyberjack_startup,
.shutdown = cyberjack_shutdown,
.open = cyberjack_open,
.close = cyberjack_close,
.write = cyberjack_write,
.write_room = cyberjack_write_room,
.read_int_callback = cyberjack_read_int_callback,
.read_bulk_callback = cyberjack_read_bulk_callback,
.write_bulk_callback = cyberjack_write_bulk_callback,
};
struct cyberjack_private {
spinlock_t lock; /* Lock for SMP */
short rdtodo; /* Bytes still to read */
unsigned char wrbuf[5*64]; /* Buffer for collecting data to write */
short wrfilled; /* Overall data size we already got */
short wrsent; /* Data already sent */
};
/* do some startup allocations not currently performed by usb_serial_probe() */
static int cyberjack_startup(struct usb_serial *serial)
{
struct cyberjack_private *priv;
int i;
dbg("%s", __func__);
/* allocate the private data structure */
priv = kmalloc(sizeof(struct cyberjack_private), GFP_KERNEL);
if (!priv)
return -ENOMEM;
/* set initial values */
spin_lock_init(&priv->lock);
priv->rdtodo = 0;
priv->wrfilled = 0;
priv->wrsent = 0;
usb_set_serial_port_data(serial->port[0], priv);
init_waitqueue_head(&serial->port[0]->write_wait);
for (i = 0; i < serial->num_ports; ++i) {
int result;
serial->port[i]->interrupt_in_urb->dev = serial->dev;
result = usb_submit_urb(serial->port[i]->interrupt_in_urb,
GFP_KERNEL);
if (result)
err(" usb_submit_urb(read int) failed");
dbg("%s - usb_submit_urb(int urb)", __func__);
}
return( 0 );
}
static void cyberjack_shutdown(struct usb_serial *serial)
{
int i;
dbg("%s", __func__);
for (i = 0; i < serial->num_ports; ++i) {
usb_kill_urb(serial->port[i]->interrupt_in_urb);
/* My special items, the standard routines free my urbs */
kfree(usb_get_serial_port_data(serial->port[i]));
usb_set_serial_port_data(serial->port[i], NULL);
}
}
static int cyberjack_open(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp)
{
struct cyberjack_private *priv;
unsigned long flags;
int result = 0;
dbg("%s - port %d", __func__, port->number);
dbg("%s - usb_clear_halt", __func__ );
usb_clear_halt(port->serial->dev, port->write_urb->pipe);
/* 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;
priv = usb_get_serial_port_data(port);
spin_lock_irqsave(&priv->lock, flags);
priv->rdtodo = 0;
priv->wrfilled = 0;
priv->wrsent = 0;
spin_unlock_irqrestore(&priv->lock, flags);
return result;
}
static void cyberjack_close(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp)
{
dbg("%s - port %d", __func__, port->number);
if (port->serial->dev) {
/* shutdown any bulk reads that might be going on */
usb_kill_urb(port->write_urb);
usb_kill_urb(port->read_urb);
}
}
static int cyberjack_write(struct tty_struct *tty,
struct usb_serial_port *port, const unsigned char *buf, int count)
{
struct usb_serial *serial = port->serial;
struct cyberjack_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
int result;
int wrexpected;
dbg("%s - port %d", __func__, port->number);
if (count == 0) {
dbg("%s - write request of 0 bytes", __func__);
return 0;
}
spin_lock_bh(&port->lock);
if (port->write_urb_busy) {
spin_unlock_bh(&port->lock);
dbg("%s - already writing", __func__);
return 0;
}
port->write_urb_busy = 1;
spin_unlock_bh(&port->lock);
spin_lock_irqsave(&priv->lock, flags);
if( (count+priv->wrfilled) > sizeof(priv->wrbuf) ) {
/* To much data for buffer. Reset buffer. */
priv->wrfilled = 0;
port->write_urb_busy = 0;
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
/* Copy data */
memcpy (priv->wrbuf+priv->wrfilled, buf, count);
usb_serial_debug_data(debug, &port->dev, __func__, count,
priv->wrbuf+priv->wrfilled);
priv->wrfilled += count;
if( priv->wrfilled >= 3 ) {
wrexpected = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
dbg("%s - expected data: %d", __func__, wrexpected);
} else {
wrexpected = sizeof(priv->wrbuf);
}
if( priv->wrfilled >= wrexpected ) {
/* We have enough data to begin transmission */
int length;
dbg("%s - transmitting data (frame 1)", __func__);
length = (wrexpected > port->bulk_out_size) ? port->bulk_out_size : wrexpected;
memcpy (port->write_urb->transfer_buffer, priv->wrbuf, length );
priv->wrsent=length;
/* set up our urb */
usb_fill_bulk_urb(port->write_urb, serial->dev,
usb_sndbulkpipe(serial->dev, port->bulk_out_endpointAddress),
port->write_urb->transfer_buffer, length,
((serial->type->write_bulk_callback) ?
serial->type->write_bulk_callback :
cyberjack_write_bulk_callback),
port);
/* send the data out the bulk port */
result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
if (result) {
err("%s - failed submitting write urb, error %d", __func__, result);
/* Throw away data. No better idea what to do with it. */
priv->wrfilled = 0;
priv->wrsent = 0;
spin_unlock_irqrestore(&priv->lock, flags);
port->write_urb_busy = 0;
return 0;
}
dbg("%s - priv->wrsent=%d", __func__,priv->wrsent);
dbg("%s - priv->wrfilled=%d", __func__,priv->wrfilled);
if( priv->wrsent>=priv->wrfilled ) {
dbg("%s - buffer cleaned", __func__);
memset( priv->wrbuf, 0, sizeof(priv->wrbuf) );
priv->wrfilled = 0;
priv->wrsent = 0;
}
}
spin_unlock_irqrestore(&priv->lock, flags);
return (count);
}
static int cyberjack_write_room(struct tty_struct *tty)
{
/* FIXME: .... */
return CYBERJACK_LOCAL_BUF_SIZE;
}
static void cyberjack_read_int_callback(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
struct cyberjack_private *priv = usb_get_serial_port_data(port);
unsigned char *data = urb->transfer_buffer;
int status = urb->status;
int result;
dbg("%s - port %d", __func__, port->number);
/* the urb might have been killed. */
if (status)
return;
usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data);
/* React only to interrupts signaling a bulk_in transfer */
if( (urb->actual_length == 4) && (data[0] == 0x01) ) {
short old_rdtodo;
/* This is a announcement of coming bulk_ins. */
unsigned short size = ((unsigned short)data[3]<<8)+data[2]+3;
spin_lock(&priv->lock);
old_rdtodo = priv->rdtodo;
if( (old_rdtodo+size)<(old_rdtodo) ) {
dbg( "To many bulk_in urbs to do." );
spin_unlock(&priv->lock);
goto resubmit;
}
/* "+=" is probably more fault tollerant than "=" */
priv->rdtodo += size;
dbg("%s - rdtodo: %d", __func__, priv->rdtodo);
spin_unlock(&priv->lock);
if( !old_rdtodo ) {
port->read_urb->dev = port->serial->dev;
result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
if( result )
err("%s - failed resubmitting read urb, error %d", __func__, result);
dbg("%s - usb_submit_urb(read urb)", __func__);
}
}
resubmit:
port->interrupt_in_urb->dev = port->serial->dev;
result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
if (result)
err(" usb_submit_urb(read int) failed");
dbg("%s - usb_submit_urb(int urb)", __func__);
}
static void cyberjack_read_bulk_callback(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
struct cyberjack_private *priv = usb_get_serial_port_data(port);
struct tty_struct *tty;
unsigned char *data = urb->transfer_buffer;
short todo;
int result;
int status = urb->status;
dbg("%s - port %d", __func__, port->number);
usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data);
if (status) {
dbg("%s - nonzero read bulk status received: %d",
__func__, status);
return;
}
tty = port->port.tty;
if (!tty) {
dbg("%s - ignoring since device not open\n", __func__);
return;
}
if (urb->actual_length) {
tty_buffer_request_room(tty, urb->actual_length);
tty_insert_flip_string(tty, data, urb->actual_length);
tty_flip_buffer_push(tty);
}
spin_lock(&priv->lock);
/* Reduce urbs to do by one. */
priv->rdtodo-=urb->actual_length;
/* Just to be sure */
if ( priv->rdtodo<0 ) priv->rdtodo = 0;
todo = priv->rdtodo;
spin_unlock(&priv->lock);
dbg("%s - rdtodo: %d", __func__, todo);
/* Continue to read if we have still urbs to do. */
if( todo /* || (urb->actual_length==port->bulk_in_endpointAddress)*/ ) {
port->read_urb->dev = port->serial->dev;
result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
if (result)
err("%s - failed resubmitting read urb, error %d", __func__, result);
dbg("%s - usb_submit_urb(read urb)", __func__);
}
}
static void cyberjack_write_bulk_callback(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
struct cyberjack_private *priv = usb_get_serial_port_data(port);
int status = urb->status;
dbg("%s - port %d", __func__, port->number);
port->write_urb_busy = 0;
if (status) {
dbg("%s - nonzero write bulk status received: %d",
__func__, status);
return;
}
spin_lock(&priv->lock);
/* only do something if we have more data to send */
if( priv->wrfilled ) {
int length, blksize, result;
dbg("%s - transmitting data (frame n)", __func__);
length = ((priv->wrfilled - priv->wrsent) > port->bulk_out_size) ?
port->bulk_out_size : (priv->wrfilled - priv->wrsent);
memcpy (port->write_urb->transfer_buffer, priv->wrbuf + priv->wrsent,
length );
priv->wrsent+=length;
/* set up our urb */
usb_fill_bulk_urb(port->write_urb, port->serial->dev,
usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
port->write_urb->transfer_buffer, length,
((port->serial->type->write_bulk_callback) ?
port->serial->type->write_bulk_callback :
cyberjack_write_bulk_callback),
port);
/* send the data out the bulk port */
result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
if (result) {
err("%s - failed submitting write urb, error %d", __func__, result);
/* Throw away data. No better idea what to do with it. */
priv->wrfilled = 0;
priv->wrsent = 0;
goto exit;
}
dbg("%s - priv->wrsent=%d", __func__,priv->wrsent);
dbg("%s - priv->wrfilled=%d", __func__,priv->wrfilled);
blksize = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
if( (priv->wrsent>=priv->wrfilled) || (priv->wrsent>=blksize) ) {
dbg("%s - buffer cleaned", __func__);
memset( priv->wrbuf, 0, sizeof(priv->wrbuf) );
priv->wrfilled = 0;
priv->wrsent = 0;
}
}
exit:
spin_unlock(&priv->lock);
usb_serial_port_softint(port);
}
static int __init cyberjack_init (void)
{
int retval;
retval = usb_serial_register(&cyberjack_device);
if (retval)
goto failed_usb_serial_register;
retval = usb_register(&cyberjack_driver);
if (retval)
goto failed_usb_register;
info(DRIVER_VERSION " " DRIVER_AUTHOR);
info(DRIVER_DESC);
return 0;
failed_usb_register:
usb_serial_deregister(&cyberjack_device);
failed_usb_serial_register:
return retval;
}
static void __exit cyberjack_exit (void)
{
usb_deregister (&cyberjack_driver);
usb_serial_deregister (&cyberjack_device);
}
module_init(cyberjack_init);
module_exit(cyberjack_exit);
MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_VERSION( DRIVER_VERSION );
MODULE_LICENSE("GPL");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
