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/*
* REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver
*
* Copyright (C) 2001 REINER SCT
* Author: Matthias Bruestle
*
* Contact: linux-usb@sii.li (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.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/fcntl.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/usb.h>
#ifdef CONFIG_USB_SERIAL_DEBUG
static int debug = 1;
#else
static int debug;
#endif
#include "usb-serial.h"
/*
* Version Information
*/
#define DRIVER_VERSION "v1.0"
#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 usb_serial_port *port, struct file *filp);
static void cyberjack_close (struct usb_serial_port *port, struct file *filp);
static int cyberjack_write (struct usb_serial_port *port, int from_user,
const unsigned char *buf, int count);
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 __devinitdata 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_serial_device_type cyberjack_device = {
name: "Reiner SCT Cyberjack USB card reader",
id_table: id_table,
needs_interrupt_in: MUST_HAVE,
needs_bulk_in: MUST_HAVE,
needs_bulk_out: MUST_HAVE,
num_interrupt_in: 1,
num_bulk_in: 1,
num_bulk_out: 1,
num_ports: 1,
startup: cyberjack_startup,
shutdown: cyberjack_shutdown,
open: cyberjack_open,
close: cyberjack_close,
write: cyberjack_write,
read_int_callback: cyberjack_read_int_callback,
read_bulk_callback: cyberjack_read_bulk_callback,
write_bulk_callback: cyberjack_write_bulk_callback,
};
struct cyberjack_private {
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 akready sent */
};
/* do some startup allocations not currently performed by usb_serial_probe() */
static int cyberjack_startup (struct usb_serial *serial)
{
struct cyberjack_private *priv;
dbg (__FUNCTION__);
/* allocate the private data structure */
serial->port->private = kmalloc(sizeof(struct cyberjack_private), GFP_KERNEL);
if (!serial->port->private)
return (-1); /* error */
/* set initial values */
priv = (struct cyberjack_private *)serial->port->private;
priv->rdtodo = 0;
priv->wrfilled = 0;
priv->wrsent = 0;
init_waitqueue_head(&serial->port->write_wait);
return( 0 );
}
static void cyberjack_shutdown (struct usb_serial *serial)
{
int i;
dbg (__FUNCTION__);
/* stop reads and writes on all ports */
for (i=0; i < serial->num_ports; ++i) {
while (serial->port[i].open_count > 0) {
cyberjack_close (&serial->port[i], NULL);
}
/* My special items, the standard routines free my urbs */
if (serial->port[i].private)
kfree(serial->port[i].private);
}
}
static int cyberjack_open (struct usb_serial_port *port, struct file *filp)
{
struct cyberjack_private *priv;
int result = 0;
if (port_paranoia_check (port, __FUNCTION__))
return -ENODEV;
MOD_INC_USE_COUNT;
dbg(__FUNCTION__ " - port %d", port->number);
down (&port->sem);
++port->open_count;
if (!port->active) {
port->active = 1;
/* 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.
*/
port->tty->low_latency = 1;
priv = (struct cyberjack_private *)port->private;
priv->rdtodo = 0;
priv->wrfilled = 0;
priv->wrsent = 0;
/* shutdown any bulk reads that might be going on */
usb_unlink_urb (port->write_urb);
usb_unlink_urb (port->read_urb);
usb_unlink_urb (port->interrupt_in_urb);
port->interrupt_in_urb->dev = port->serial->dev;
result = usb_submit_urb(port->interrupt_in_urb);
if (result)
err(" usb_submit_urb(read int) failed");
dbg(__FUNCTION__ " - usb_submit_urb(int urb)");
}
up (&port->sem);
return result;
}
static void cyberjack_close (struct usb_serial_port *port, struct file *filp)
{
dbg(__FUNCTION__ " - port %d", port->number);
down (&port->sem);
--port->open_count;
if (port->open_count <= 0) {
if (port->serial->dev) {
/* shutdown any bulk reads that might be going on */
usb_unlink_urb (port->write_urb);
usb_unlink_urb (port->read_urb);
usb_unlink_urb (port->interrupt_in_urb);
}
port->active = 0;
port->open_count = 0;
}
up (&port->sem);
MOD_DEC_USE_COUNT;
}
static int cyberjack_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count)
{
struct usb_serial *serial = port->serial;
struct cyberjack_private *priv = (struct cyberjack_private *)port->private;
int result;
int wrexpected;
dbg(__FUNCTION__ " - port %d", port->number);
dbg(__FUNCTION__ " - from_user %d", from_user);
if (count == 0) {
dbg(__FUNCTION__ " - write request of 0 bytes");
return (0);
}
if (port->write_urb->status == -EINPROGRESS) {
dbg (__FUNCTION__ " - already writing");
return (0);
}
down (&port->sem);
if( (count+priv->wrfilled)>sizeof(priv->wrbuf) ) {
/* To much data for buffer. Reset buffer. */
priv->wrfilled=0;
return (0);
}
/* Copy data */
if (from_user) {
if (copy_from_user(priv->wrbuf+priv->wrfilled, buf, count))
return -EFAULT;
} else {
memcpy (priv->wrbuf+priv->wrfilled, buf, count);
}
usb_serial_debug_data (__FILE__, __FUNCTION__, count,
priv->wrbuf+priv->wrfilled);
priv->wrfilled += count;
if( priv->wrfilled >= 3 ) {
wrexpected = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
dbg(__FUNCTION__ " - expected data: %d", wrexpected);
} else {
wrexpected = sizeof(priv->wrbuf);
}
if( priv->wrfilled >= wrexpected ) {
/* We have enough data to begin transmission */
int length;
dbg(__FUNCTION__ " - transmitting data (frame 1)");
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 */
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);
if (result) {
err(__FUNCTION__ " - failed submitting write urb, error %d", result);
/* Throw away data. No better idea what to do with it. */
priv->wrfilled=0;
priv->wrsent=0;
up (&port->sem);
return 0;
}
dbg(__FUNCTION__ " - priv->wrsent=%d",priv->wrsent);
dbg(__FUNCTION__ " - priv->wrfilled=%d",priv->wrfilled);
if( priv->wrsent>=priv->wrfilled ) {
dbg(__FUNCTION__ " - buffer cleaned");
memset( priv->wrbuf, 0, sizeof(priv->wrbuf) );
priv->wrfilled=0;
priv->wrsent=0;
}
}
up (&port->sem);
return (count);
}
static void cyberjack_read_int_callback( struct urb *urb )
{
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
struct cyberjack_private *priv = (struct cyberjack_private *)port->private;
struct usb_serial *serial;
unsigned char *data = urb->transfer_buffer;
if (port_paranoia_check (port, __FUNCTION__)) return;
dbg(__FUNCTION__ " - port %d", port->number);
/* the urb might have been killed. */
if (urb->status)
return;
serial = port->serial;
if (serial_paranoia_check (serial, __FUNCTION__)) return;
usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data);
/* React only to interrupts signaling a bulk_in transfer */
if( (urb->actual_length==4) && (data[0]==0x01) ) {
short old_rdtodo = priv->rdtodo;
int result;
/* This is a announcement of comming bulk_ins. */
unsigned short size = ((unsigned short)data[3]<<8)+data[2]+3;
if( (size>259) || (size==0) ) {
dbg( "Bad announced bulk_in data length: %d", size );
/* Dunno what is most reliable to do here. */
/* return; */
}
if( (old_rdtodo+size)<(old_rdtodo) ) {
dbg( "To many bulk_in urbs to do." );
return;
}
/* "+=" is probably more fault tollerant than "=" */
priv->rdtodo += size;
dbg(__FUNCTION__ " - rdtodo: %d", priv->rdtodo);
if( !old_rdtodo ) {
port->read_urb->dev = port->serial->dev;
result = usb_submit_urb(port->read_urb);
if( result )
err(__FUNCTION__ " - failed resubmitting read urb, error %d", result);
dbg(__FUNCTION__ " - usb_submit_urb(read urb)");
}
}
}
static void cyberjack_read_bulk_callback (struct urb *urb)
{
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
struct cyberjack_private *priv = (struct cyberjack_private *)port->private;
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
struct tty_struct *tty;
unsigned char *data = urb->transfer_buffer;
int i;
int result;
dbg(__FUNCTION__ " - port %d", port->number);
if (!serial) {
dbg(__FUNCTION__ " - bad serial pointer, exiting");
return;
}
if (urb->status) {
usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
dbg(__FUNCTION__ " - nonzero read bulk status received: %d", urb->status);
return;
}
usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data);
tty = port->tty;
if (urb->actual_length) {
for (i = 0; i < urb->actual_length ; ++i) {
/* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them. */
if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
tty_flip_buffer_push(tty);
}
/* this doesn't actually push the data through unless tty->low_latency is set */
tty_insert_flip_char(tty, data[i], 0);
}
tty_flip_buffer_push(tty);
}
/* Reduce urbs to do by one. */
priv->rdtodo-=urb->actual_length;
/* Just to be sure */
if( priv->rdtodo<0 ) priv->rdtodo=0;
dbg(__FUNCTION__ " - rdtodo: %d", priv->rdtodo);
/* Continue to read if we have still urbs to do. */
if( priv->rdtodo /* || (urb->actual_length==port->bulk_in_endpointAddress)*/ ) {
port->read_urb->dev = port->serial->dev;
result = usb_submit_urb(port->read_urb);
if (result)
err(__FUNCTION__ " - failed resubmitting read urb, error %d", result);
dbg(__FUNCTION__ " - usb_submit_urb(read urb)");
}
}
static void cyberjack_write_bulk_callback (struct urb *urb)
{
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
struct cyberjack_private *priv = (struct cyberjack_private *)port->private;
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
dbg(__FUNCTION__ " - port %d", port->number);
if (!serial) {
dbg(__FUNCTION__ " - bad serial pointer, exiting");
return;
}
if (urb->status) {
dbg(__FUNCTION__ " - nonzero write bulk status received: %d", urb->status);
return;
}
/* only do something if we have more data to send */
if( priv->wrfilled ) {
int length, blksize, result;
if (port->write_urb->status == -EINPROGRESS) {
dbg (__FUNCTION__ " - already writing");
return;
}
down (&port->sem);
dbg(__FUNCTION__ " - transmitting data (frame n)");
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 */
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);
if (result) {
err(__FUNCTION__ " - failed submitting write urb, error %d", result);
/* Throw away data. No better idea what to do with it. */
priv->wrfilled=0;
priv->wrsent=0;
up (&port->sem);
queue_task(&port->tqueue, &tq_immediate);
mark_bh(IMMEDIATE_BH);
return;
}
dbg(__FUNCTION__ " - priv->wrsent=%d",priv->wrsent);
dbg(__FUNCTION__ " - priv->wrfilled=%d",priv->wrfilled);
blksize = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
if( (priv->wrsent>=priv->wrfilled) || (priv->wrsent>=blksize) ) {
dbg(__FUNCTION__ " - buffer cleaned");
memset( priv->wrbuf, 0, sizeof(priv->wrbuf) );
priv->wrfilled=0;
priv->wrsent=0;
}
up (&port->sem);
queue_task(&port->tqueue, &tq_immediate);
mark_bh(IMMEDIATE_BH);
return;
}
queue_task(&port->tqueue, &tq_immediate);
mark_bh(IMMEDIATE_BH);
return;
}
static int __init cyberjack_init (void)
{
usb_serial_register (&cyberjack_device);
info(DRIVER_VERSION " " DRIVER_AUTHOR);
info(DRIVER_DESC);
return 0;
}
static void __exit cyberjack_exit (void)
{
usb_serial_deregister (&cyberjack_device);
}
module_init(cyberjack_init);
module_exit(cyberjack_exit);
MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE("GPL");
MODULE_PARM(debug, "i");
MODULE_PARM_DESC(debug, "Debug enabled or not");
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