1 files changed, 514 insertions, 0 deletions

diff --git a/drivers/usb/serial/cyberjack.c b/drivers/usb/serial/cyberjack.c
new file mode 100644
index 000000000000..46a204cd40e1
--- /dev/null
+++ b/drivers/usb/serial/cyberjack.c
@@ -0,0 +1,514 @@
+/*
+ *  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/config.h>
+#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 "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 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, const unsigned char *buf, int count);
+static int cyberjack_write_room( struct usb_serial_port *port );
+static void cyberjack_read_int_callback (struct urb *urb, struct pt_regs *regs);
+static void cyberjack_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
+static void cyberjack_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
+
+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 = {
+	.owner =	THIS_MODULE,
+	.name =		"cyberjack",
+	.probe =	usb_serial_probe,
+	.disconnect =	usb_serial_disconnect,
+	.id_table =	id_table,
+};
+
+static struct usb_serial_device_type cyberjack_device = {
+	.owner =		THIS_MODULE,
+	.name =			"Reiner SCT Cyberjack USB card reader",
+	.short_name =		"cyberjack",
+	.id_table =		id_table,
+	.num_interrupt_in =	1,
+	.num_bulk_in =		1,
+	.num_bulk_out =		1,
+	.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", __FUNCTION__);
+
+	/* 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)", __FUNCTION__);
+	}
+
+	return( 0 );
+}
+
+static void cyberjack_shutdown (struct usb_serial *serial)
+{
+	int i;
+	
+	dbg("%s", __FUNCTION__);
+
+	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 usb_serial_port *port, struct file *filp)
+{
+	struct cyberjack_private *priv;
+	unsigned long flags;
+	int result = 0;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	dbg("%s - usb_clear_halt", __FUNCTION__ );
+	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.
+	 */
+	port->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 usb_serial_port *port, struct file *filp)
+{
+	dbg("%s - port %d", __FUNCTION__, 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 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", __FUNCTION__, port->number);
+
+	if (count == 0) {
+		dbg("%s - write request of 0 bytes", __FUNCTION__);
+		return (0);
+	}
+
+	if (port->write_urb->status == -EINPROGRESS) {
+		dbg("%s - already writing", __FUNCTION__);
+		return (0);
+	}
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	if( (count+priv->wrfilled)>sizeof(priv->wrbuf) ) {
+		/* To much data for buffer. Reset buffer. */
+		priv->wrfilled=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, __FUNCTION__, 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", __FUNCTION__, 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)", __FUNCTION__);
+		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", __FUNCTION__, result);
+			/* Throw away data. No better idea what to do with it. */
+			priv->wrfilled=0;
+			priv->wrsent=0;
+			spin_unlock_irqrestore(&priv->lock, flags);
+			return 0;
+		}
+
+		dbg("%s - priv->wrsent=%d", __FUNCTION__,priv->wrsent);
+		dbg("%s - priv->wrfilled=%d", __FUNCTION__,priv->wrfilled);
+
+		if( priv->wrsent>=priv->wrfilled ) {
+			dbg("%s - buffer cleaned", __FUNCTION__);
+			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 usb_serial_port *port )
+{
+	return CYBERJACK_LOCAL_BUF_SIZE;
+}
+
+static void cyberjack_read_int_callback( struct urb *urb, struct pt_regs *regs )
+{
+	struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+	struct cyberjack_private *priv = usb_get_serial_port_data(port);
+	unsigned char *data = urb->transfer_buffer;
+	int result;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	/* the urb might have been killed. */
+	if (urb->status)
+		return;
+
+	usb_serial_debug_data(debug, &port->dev, __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;
+		int result;
+
+		/* 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", __FUNCTION__, 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", __FUNCTION__, result);
+			dbg("%s - usb_submit_urb(read urb)", __FUNCTION__);
+		}
+	}
+
+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)", __FUNCTION__);
+}
+
+static void cyberjack_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
+{
+	struct usb_serial_port *port = (struct usb_serial_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 i;
+	int result;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+	
+	usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
+	if (urb->status) {
+		dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
+		return;
+	}
+
+	tty = port->tty;
+	if (!tty) {
+		dbg("%s - ignoring since device not open\n", __FUNCTION__);
+		return;
+	}
+	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);
+	}
+
+	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", __FUNCTION__, 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", __FUNCTION__, result);
+		dbg("%s - usb_submit_urb(read urb)", __FUNCTION__);
+	}
+}
+
+static void cyberjack_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+	struct cyberjack_private *priv = usb_get_serial_port_data(port);
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+	
+	if (urb->status) {
+		dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
+		return;
+	}
+
+	spin_lock(&priv->lock);
+
+	/* only do something if we have more data to send */
+	if( priv->wrfilled ) {
+		int length, blksize, result;
+
+		if (port->write_urb->status == -EINPROGRESS) {
+			dbg("%s - already writing", __FUNCTION__);
+			spin_unlock(&priv->lock);
+			return;
+		}
+
+		dbg("%s - transmitting data (frame n)", __FUNCTION__);
+
+		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", __FUNCTION__, 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", __FUNCTION__,priv->wrsent);
+		dbg("%s - priv->wrfilled=%d", __FUNCTION__,priv->wrfilled);
+
+		blksize = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
+
+		if( (priv->wrsent>=priv->wrfilled) || (priv->wrsent>=blksize) ) {
+			dbg("%s - buffer cleaned", __FUNCTION__);
+			memset( priv->wrbuf, 0, sizeof(priv->wrbuf) );
+			priv->wrfilled=0;
+			priv->wrsent=0;
+		}
+	}
+
+exit:
+	spin_unlock(&priv->lock);
+	schedule_work(&port->work);
+}
+
+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");