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