Hi,
Here's a patch against 2.4.6-pre5 that adds 2 new USB-Serial drivers.
One of them is support for devices that use PL2303 chipsets (currently
there are two known devices, but I think there are more out there.) The
other driver supports the REINER SCT cyberJack pinpad/e-com USB chipcard
reader which looks like a serial port to userspace.
The cyberJack driver was written by Matthias Bruestle.
thanks,
greg k-h
diff -Nru a/CREDITS b/CREDITS
--- a/CREDITS Thu Jun 21 14:48:19 2001
+++ b/CREDITS Thu Jun 21 14:48:19 2001
@@ -454,6 +454,11 @@
E: [EMAIL PROTECTED]
D: USB Serial Empeg Empeg-car Mark I/II Driver
+N: Matthias Bruestle
+E: [EMAIL PROTECTED]
+D: REINER SCT cyberJack pinpad/e-com USB chipcard reader driver
+S: Germany
+
N: Ray Burr
E: [EMAIL PROTECTED]
D: Original author of Amiga FFS filesystem
diff -Nru a/Documentation/Configure.help b/Documentation/Configure.help
--- a/Documentation/Configure.help Thu Jun 21 14:48:19 2001
+++ b/Documentation/Configure.help Thu Jun 21 14:48:19 2001
@@ -11243,6 +11243,29 @@
The module will be called mct_u232.o. If you want to compile it as
a module, say M here and read Documentation/modules.txt.
+USB Prolific 2303 Single Port Serial Driver
+CONFIG_USB_SERIAL_PL2303
+ Say Y here if you want to use the PL2303 USB Serial single port
+ adapter from Prolific.
+
+ This code is also available as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want).
+ The module will be called pl2303.o. If you want to compile it as
+ a module, say M here and read Documentation/modules.txt.
+
+USB REINER SCT cyberJack pinpad/e-com chipcard reader
+CONFIG_USB_SERIAL_CYBERJACK
+ Say Y here if you want to use a cyberJack pinpad/e-com USB chipcard
+ reader. This is an interface to ISO 7816 compatible contactbased
+ chipcards, e.g. GSM SIMs.
+
+ This code is also available as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want).
+ The module will be called cyberjack.o. If you want to compile it as
+ a module, say M here and read Documentation/modules.txt.
+
+ If unsure, say N.
+
USB Edgeport Serial Driver
CONFIG_USB_SERIAL_EDGEPORT
Say Y here if you want to use any of the following devices from
diff -Nru a/Documentation/usb/usb-serial.txt b/Documentation/usb/usb-serial.txt
--- a/Documentation/usb/usb-serial.txt Thu Jun 21 14:48:18 2001
+++ b/Documentation/usb/usb-serial.txt Thu Jun 21 14:48:18 2001
@@ -245,6 +245,17 @@
Edgeport/16 Dual
+REINER SCT cyberJack pinpad/e-com USB chipcard reader
+
+ Interface to ISO 7816 compatible contactbased chipcards, e.g. GSM SIMs.
+
+Current status:
+ This is the kernel part of the driver for this USB card reader.
+ There is also a user part for a CT-API driver available. A site
+ for downloading is TBA. For now, you can request it from the
+ maintainer ([EMAIL PROTECTED]).
+
+
Generic Serial driver
If your device is not one of the above listed devices, compatible with
diff -Nru a/MAINTAINERS b/MAINTAINERS
--- a/MAINTAINERS Thu Jun 21 14:48:19 2001
+++ b/MAINTAINERS Thu Jun 21 14:48:19 2001
@@ -1462,6 +1462,12 @@
L: [EMAIL PROTECTED]
S: Maintained
+USB SERIAL CYBERJACK PINPAD/E-COM DRIVER
+M: [EMAIL PROTECTED]
+L: [EMAIL PROTECTED]
+L: [EMAIL PROTECTED]
+S: Supported
+
USB MASS STORAGE DRIVER
P: Matthew Dharm
M: [EMAIL PROTECTED]
diff -Nru a/drivers/usb/serial/Config.in b/drivers/usb/serial/Config.in
--- a/drivers/usb/serial/Config.in Thu Jun 21 14:48:19 2001
+++ b/drivers/usb/serial/Config.in Thu Jun 21 14:48:19 2001
@@ -28,6 +28,8 @@
bool ' USB Keyspan USA-49W Firmware' CONFIG_USB_SERIAL_KEYSPAN_USA49W
fi
dep_tristate ' USB MCT Single Port Serial Driver (EXPERIMENTAL)'
CONFIG_USB_SERIAL_MCT_U232 $CONFIG_USB_SERIAL $CONFIG_EXPERIMENTAL
+ dep_tristate ' USB Prolific 2303 Single Port Serial Driver (EXPERIMENTAL)'
+CONFIG_USB_SERIAL_PL2303 $CONFIG_USB_SERIAL $CONFIG_EXPERIMENTAL
+ dep_tristate ' USB REINER SCT cyberJack pinpad/e-com chipcard reader
+(EXPERIMENTAL)' CONFIG_USB_SERIAL_CYBERJACK $CONFIG_USB_SERIAL $CONFIG_EXPERIMENTAL
dep_tristate ' USB ZyXEL omni.net LCD Plus Driver (EXPERIMENTAL)'
CONFIG_USB_SERIAL_OMNINET $CONFIG_USB_SERIAL $CONFIG_EXPERIMENTAL
fi
diff -Nru a/drivers/usb/serial/Makefile b/drivers/usb/serial/Makefile
--- a/drivers/usb/serial/Makefile Thu Jun 21 14:48:18 2001
+++ b/drivers/usb/serial/Makefile Thu Jun 21 14:48:18 2001
@@ -18,6 +18,8 @@
obj-$(CONFIG_USB_SERIAL_EMPEG) += empeg.o
obj-$(CONFIG_USB_SERIAL_MCT_U232) += mct_u232.o
obj-$(CONFIG_USB_SERIAL_EDGEPORT) += io_edgeport.o
+obj-$(CONFIG_USB_SERIAL_PL2303) += pl2303.o
+obj-$(CONFIG_USB_SERIAL_CYBERJACK) += cyberjack.o
# Objects that export symbols.
export-objs := usbserial.o
diff -Nru a/drivers/usb/serial/cyberjack.c b/drivers/usb/serial/cyberjack.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/usb/serial/cyberjack.c Thu Jun 21 14:48:19 2001
@@ -0,0 +1,520 @@
+/*
+ * REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver
+ *
+ * Copyright (C) 2001 REINER SCT
+ * Author: Matthias Bruestle
+ *
+ * Contact: [EMAIL PROTECTED] (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 ([EMAIL PROTECTED]) 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);
+
+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) {
+ /* 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) {
+ copy_from_user(priv->wrbuf+priv->wrfilled, buf, count);
+ } 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;
+
+ dbg(__FUNCTION__ " - port %d", port->number);
+
+ /* the urb might have been killed. */
+ if (urb->status)
+ return;
+
+ if (port_paranoia_check (port, "cyberjack_read_interrupt")) return;
+
+ serial = port->serial;
+ if (serial_paranoia_check (serial, "cyberjack_read_interrupt")) 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_PARM(debug, "i");
+MODULE_PARM_DESC(debug, "Debug enabled or not");
+
diff -Nru a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/usb/serial/pl2303.c Thu Jun 21 14:48:19 2001
@@ -0,0 +1,844 @@
+/*
+ * Prolific PL2303 USB to serial adaptor driver
+ *
+ * Copyright (C) 2001 Greg Kroah-Hartman ([EMAIL PROTECTED])
+ *
+ * Original driver for 2.2.x by anonymous
+ *
+ * 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.
+ *
+ * See Documentation/usb/usb-serial.txt for more information on using this driver
+ *
+ * 2001_Jun_06 gkh
+ * finished porting to 2.4 format.
+ *
+ */
+
+#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/serial.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"
+#include "pl2303.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.5"
+#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
+
+
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+
+#define PL2303_LOCK(port,flags) \
+ do { \
+ spin_lock_irqsave(&((struct pl2303_private *)(port->private))->lock,
+flags); \
+ } while (0)
+
+#define PL2303_UNLOCK(port,flags) \
+ do { \
+ spin_unlock_irqrestore(&((struct pl2303_private
+*)(port->private))->lock, flags); \
+ } while (0)
+
+
+
+static __devinitdata struct usb_device_id id_table [] = {
+ { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
+ { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, id_table);
+
+struct pl2303_private {
+ spinlock_t lock;
+ unsigned char *xmit_buf;
+ int xmit_head;
+ int xmit_tail;
+ int xmit_cnt;
+};
+
+/* function prototypes for a PL2303 serial converter */
+static int pl2303_startup (struct usb_serial *serial);
+static int pl2303_open (struct usb_serial_port *port, struct file *filp);
+static void pl2303_close (struct usb_serial_port *port, struct file *filp);
+static void pl2303_set_termios (struct usb_serial_port *port,
+ struct termios *old);
+static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
+ unsigned int cmd, unsigned long arg);
+static void pl2303_throttle (struct usb_serial_port *port);
+static void pl2303_unthrottle (struct usb_serial_port *port);
+static void pl2303_read_int_callback (struct urb *urb);
+static void pl2303_read_bulk_callback (struct urb *urb);
+static void pl2303_write_bulk_callback (struct urb *urb);
+static int pl2303_write (struct usb_serial_port *port, int from_user,
+ const unsigned char *buf, int count);
+static int pl2303_write_room(struct usb_serial_port *port);
+static int pl2303_chars_in_buffer(struct usb_serial_port *port);
+static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
+static void start_xmit (struct usb_serial_port *port);
+
+
+/* All of the device info needed for the PL2303 SIO serial converter */
+static struct usb_serial_device_type pl2303_device = {
+ name: "PL-2303",
+ id_table: id_table,
+ needs_interrupt_in: DONT_CARE, /* this device must have an
+interrupt in endpoint */
+ needs_bulk_in: MUST_HAVE, /* this device must have a
+bulk in endpoint */
+ needs_bulk_out: MUST_HAVE, /* this device must have a
+bulk out endpoint */
+ num_interrupt_in: NUM_DONT_CARE,
+ num_bulk_in: 1,
+ num_bulk_out: 1,
+ num_ports: 1,
+ open: pl2303_open,
+ close: pl2303_close,
+ throttle: pl2303_throttle,
+ unthrottle: pl2303_unthrottle,
+ write: pl2303_write,
+ ioctl: pl2303_ioctl,
+ write_room: pl2303_write_room,
+ chars_in_buffer: pl2303_chars_in_buffer,
+ break_ctl: pl2303_break_ctl,
+ set_termios: pl2303_set_termios,
+ read_bulk_callback: pl2303_read_bulk_callback,
+ read_int_callback: pl2303_read_int_callback,
+ write_bulk_callback: pl2303_write_bulk_callback,
+ startup: pl2303_startup,
+};
+
+
+#define WDR_TIMEOUT (HZ * 5 ) /* default urb timeout */
+
+static unsigned char *tmp_buf;
+static DECLARE_MUTEX (tmp_buf_sem);
+
+
+
+static int
+pl2303_write (struct usb_serial_port *port, int from_user,
+ const unsigned char *buf, int count)
+{ /* pl2303_write */
+ struct pl2303_private *info = (struct pl2303_private *)port->private;
+ unsigned long flags;
+ int c,ret=0;
+ struct tty_struct *tty=port->tty;
+
+ dbg ("pl2303_write port %d, %d bytes", port->number, count);
+
+ if (!info) {
+ return -ENODEV;
+ }
+
+ if (!tty || !info->xmit_buf || !tmp_buf) {
+ return 0;
+ }
+
+
+ PL2303_LOCK(port,flags);
+
+
+ if (from_user) {
+ down(&tmp_buf_sem);
+ while (1) {
+ c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - info->xmit_head));
+ if (c <= 0)
+ break;
+
+ c -= copy_from_user(tmp_buf, buf, c);
+ if (!c) {
+ if (!ret) {
+ ret = -EFAULT;
+ }
+ break;
+ }
+ c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - info->xmit_head));
+ memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c);
+ info->xmit_head = ((info->xmit_head + c) &
+(SERIAL_XMIT_SIZE-1));
+ info->xmit_cnt += c;
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+ up(&tmp_buf_sem);
+ } else {
+ while (1) {
+ c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - info->xmit_head));
+ if (c <= 0) {
+ break;
+ }
+ memcpy(info->xmit_buf + info->xmit_head, buf, c);
+ info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
+ info->xmit_cnt += c;
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+ }
+ PL2303_UNLOCK(port, flags);
+
+ if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
+ start_xmit(port);
+ }
+ return ret;
+}
+
+static int pl2303_write_room(struct usb_serial_port *port)
+{
+ struct pl2303_private *info = (struct pl2303_private *)port->private;
+ int ret;
+
+ if (!info)
+ return 0;
+
+ ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+ return ret;
+}
+
+static int pl2303_chars_in_buffer(struct usb_serial_port *port)
+{
+ struct pl2303_private *info = (struct pl2303_private *)port->private;
+
+ if (!info)
+ return 0;
+
+ return info->xmit_cnt;
+}
+
+static void pl2303_throttle(struct usb_serial_port *port)
+{
+#if 0
+ //struct usb_serial *serial = port->serial;
+ struct tty_struct *tty=port->tty;
+ unsigned long flags;
+
+
+ char buf[64];
+
+ dbg("throttle %s: %d....", tty_name(tty, buf),
+ tty->ldisc.chars_in_buffer(tty));
+
+//FIXME FIXME FIXME
+ if (I_IXOFF(tty))
+ rs_send_xchar(tty, STOP_CHAR(tty));
+
+ PL2303_LOCK(port,flags);
+ //Should remove read request if one is present
+ PL2303_UNLOCK(port,flags);
+#endif
+}
+
+static void pl2303_unthrottle(struct usb_serial_port *port)
+{
+#if 0
+ //struct usb_serial *serial = port->serial;
+ struct tty_struct *tty=port->tty;
+ unsigned long flags;
+
+
+ char buf[64];
+
+ dbg("unthrottle %s: %d....", tty_name(tty, buf),
+ tty->ldisc.chars_in_buffer(tty));
+
+ //FIXME FIXME FIXME FIXME FIXME
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ rs_send_xchar(tty, START_CHAR(tty));
+ }
+
+ PL2303_LOCK(port,flags);
+ //Should add read request if one is not present
+ PL2303_UNLOCK(fport,flags);
+#endif
+}
+
+
+static void
+pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
+{ /* pl2303_set_termios */
+ struct usb_serial *serial = port->serial;
+ unsigned int cflag = port->tty->termios->c_cflag;
+ unsigned char buf[7] = { 0, 0, 0, 0, 0, 0, 0};
+ int baud;
+ int i;
+
+
+ dbg ("pl2303_set_termios port %d", port->number);
+
+
+ i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
+ 0x21, 0xa1, 0, 0, buf, 7, 100);
+
+ dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
+
+
+ i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
+ 1, 0x40, 0, 1, NULL, 0, 100);
+
+ dbg ("0x40:1:0:1 %d", i);
+
+
+
+ if (cflag & CSIZE) {
+ switch (cflag & CSIZE) {
+ case CS6:
+ buf[6] = 6;
+ dbg ("Setting CS6");
+ break;
+ case CS7:
+ buf[6] = 7;
+ dbg ("Setting CS7");
+ break;
+ case CS8:
+ buf[6] = 8;
+ dbg ("Setting CS8");
+ break;
+ default:
+ err ("CSIZE was set but not CS6-CS8");
+ }
+ }
+
+ baud = 0;
+ switch (cflag & CBAUD) {
+ case B0:
+ err ("Can't do B0 yet"); //FIXME
+ break;
+ case B300:
+ baud = 300;
+ break;
+ case B600:
+ baud = 600;
+ break;
+ case B1200:
+ baud = 1200;
+ break;
+ case B2400:
+ baud = 2400;
+ break;
+ case B4800:
+ baud = 4800;
+ break;
+ case B9600:
+ baud = 9600;
+ break;
+ case B19200:
+ baud = 19200;
+ break;
+ case B38400:
+ baud = 38400;
+ break;
+ case B57600:
+ baud = 57600;
+ break;
+ case B115200:
+ baud = 115200;
+ break;
+ default:
+ dbg ("pl2303 driver does not support the baudrate requested
+(fix it)");
+ break;
+ }
+
+ if (baud) {
+ buf[0] = baud & 0xff;
+ buf[1] = (baud >> 8) & 0xff;
+ buf[2] = (baud >> 16) & 0xff;
+ buf[3] = (baud >> 24) & 0xff;
+ }
+
+
+ /* For reference buf[4]=1 is 1.5 stop bits */
+
+ if (cflag & CSTOPB) {
+ buf[4] = 2;
+ }
+
+
+ if (cflag & PARENB) {
+ /* For reference buf[5]=3 is mark parity */
+ /* For reference buf[5]=4 is space parity */
+ if (cflag & PARODD) {
+ buf[5] = 1;
+ } else {
+ buf[5] = 2;
+ }
+ }
+
+ i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
+ 0x20, 0x21, 0, 0, buf, 7, 100);
+
+ dbg ("0x21:0x20:0:0 %d", i);
+
+ i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
+ 0x22, 0x21, 1, 0, NULL, 0, 100);
+
+ dbg ("0x21:0x22:1:0 %d", i);
+
+ i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
+ 0x22, 0x21, 3, 0, NULL, 0, 100);
+
+ dbg ("0x21:0x22:3:0 %d", i);
+
+ buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
+
+ i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
+ 0x21, 0xa1, 0, 0, buf, 7, 100);
+
+ dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
+
+ if (cflag & CRTSCTS) {
+
+ i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
+ 0x01, 0x40, 0x0, 0x41, NULL, 0, 100);
+
+ dbg ("0x40:0x1:0x0:0x41 %d", i);
+
+ }
+
+
+ return;
+}
+
+
+static int
+pl2303_open (struct usb_serial_port *port, struct file *filp)
+{ /* pl2303_open */
+ struct termios tmp_termios;
+ struct usb_serial *serial = port->serial;
+ unsigned char buf[10];
+ int i;
+
+ dbg ("pl2303_open port %d", port->number);
+
+ port->active++;
+
+#define FISH(a,b,c,d) \
+ i=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
+ b, a,c , d, buf, 1, 100); \
+ dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,i,buf[0]);
+
+#define SOUP(a,b,c,d) \
+ i=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
+ b, a,c , d, NULL, 0, 100); \
+ dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,i);
+
+
+ FISH (0xc0, 1, 0x8484, 0);
+ SOUP (0x40, 1, 0x0404, 0);
+ FISH (0xc0, 1, 0x8484, 0);
+ FISH (0xc0, 1, 0x8383, 0);
+ FISH (0xc0, 1, 0x8484, 0);
+ SOUP (0x40, 1, 0x0404, 1);
+ FISH (0xc0, 1, 0x8484, 0);
+ FISH (0xc0, 1, 0x8383, 0);
+ SOUP (0x40, 1, 0, 1);
+ SOUP (0x40, 1, 1, 0xc0);
+ SOUP (0x40, 1, 2, 4);
+
+ /* Setup termios */
+
+ if (port->active == 1) {
+ *(port->tty->termios) = tty_std_termios;
+ port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ }
+
+
+ pl2303_set_termios (port, &tmp_termios);
+
+ //FIXME: need to assert RTS and DTR if CRTSCTS off
+
+
+ if (port->active == 1) {
+ struct pl2303_private *info;
+ unsigned long flags,page;
+ int i;
+
+ info = (struct pl2303_private *)kmalloc (sizeof(struct
+pl2303_private), GFP_KERNEL);
+ if (info == NULL) {
+ err(__FUNCTION__ " - out of memory");
+ pl2303_close (port, NULL);
+ return -ENOMEM;
+ }
+ spin_lock_init(&info->lock);
+ port->private = info;
+
+
+ page = get_free_page(GFP_KERNEL);
+ if (!page) {
+ pl2303_close (port, NULL);
+ return -ENOMEM;
+ }
+
+ PL2303_LOCK(port,flags);
+
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+ if (tmp_buf)
+ free_page(page);
+ else
+ tmp_buf = (unsigned char *) page;
+
+ PL2303_UNLOCK(port,flags);
+
+ page = get_free_page(GFP_KERNEL);
+ if (!page) {
+ pl2303_close (port, NULL);
+ return -ENOMEM;
+ }
+
+ PL2303_LOCK(port,flags);
+
+ if (info->xmit_buf)
+ free_page(page);
+ else
+ info->xmit_buf=(unsigned char *) page;
+
+ PL2303_UNLOCK(port,flags);
+
+
+ if ((i = usb_submit_urb (port->read_urb))) {
+ err ("usb_submit_urb(read bulk 1) failed");
+ dbg ("i=%d", i);
+ pl2303_close (port, NULL);
+ return -EPROTO;
+
+ }
+
+ if ((i = usb_submit_urb (port->interrupt_in_urb))) {
+ err ("usb_submit_urb(interrupt ink) failed");
+ dbg ("i=%d", i);
+ pl2303_close (port, NULL);
+
+ return -EPROTO;
+ }
+ }
+
+ return(0);
+} /* pl2303_open */
+
+
+static void
+pl2303_close (struct usb_serial_port *port, struct file *filp)
+{ /* pl2303_close */
+ struct pl2303_private *info;
+ unsigned int c_cflag = port->tty->termios->c_cflag;
+ unsigned long flags;
+
+ dbg ("pl2303_close port %d", port->number);
+
+ /* shutdown our bulk reads and writes */
+ if (port->active == 1) {
+
+ if (c_cflag & HUPCL) {
+ //FIXME: Do drop DTR
+ //FIXME: Do drop RTS
+ }
+
+ usb_unlink_urb (port->write_urb);
+ usb_unlink_urb (port->read_urb);
+ usb_unlink_urb (port->interrupt_in_urb);
+
+ info = (struct pl2303_private *)port->private;
+ if (info) {
+ PL2303_LOCK(port,flags);
+ if (info->xmit_buf) {
+ unsigned char * temp;
+ temp = info->xmit_buf;
+ info->xmit_buf = 0;
+ free_page((unsigned long) temp);
+ }
+ PL2303_UNLOCK(port,flags);
+ }
+
+ //FIXME: tmp_buf memory leak
+
+
+ }
+ port->active--;
+} /* pl2303_close */
+
+
+/* do some startup allocations not currently performed by usb_serial_probe() */
+static int
+pl2303_startup (struct usb_serial *serial)
+{
+ return(0);
+}
+
+
+static int
+pl2303_ioctl (struct usb_serial_port *port, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+// struct usb_serial *serial = port->serial;
+// __u16 urb_value=0; /* Will hold the new flags */
+// char buf[1];
+// int ret, mask;
+
+
+ dbg ("pl2303_sio ioctl 0x%04x", cmd);
+
+ /* Based on code from acm.c and others */
+ switch (cmd) {
+
+ case TIOCMGET:
+ dbg ("TIOCMGET");
+
+
+ return put_user (0, (unsigned long *) arg);
+ break;
+ case TIOCMBIS:
+ case TIOCMBIC:
+ case TIOCMSET:
+ return 0;
+
+ default:
+ /* This is not an error - turns out the higher layers will do
+ * some ioctls itself (see comment above)
+ */
+ dbg ("pl2303_sio ioctl arg not supported - it was 0x%04x",
+cmd);
+ return(-ENOIOCTLCMD);
+ break;
+ }
+ dbg ("pl2303_ioctl returning 0");
+
+ return 0;
+} /* pl2303_ioctl */
+
+
+static void pl2303_break_ctl(struct usb_serial_port *port,int break_state)
+{
+//FIXME
+}
+
+
+static void
+pl2303_read_int_callback (struct urb *urb)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ struct usb_serial *serial = get_usb_serial (port, "pl2303_read_int_callback");
+ //unsigned char *data = urb->transfer_buffer;
+ //int i;
+
+//ints auto restart...
+
+ if (!serial) {
+ return;
+ }
+
+ if (urb->status) {
+ urb->status = 0;
+ return;
+ }
+
+
+#if 0
+//FIXME need to update state of terminal lines variable
+ if (urb->actual_length) {
+ printk (KERN_DEBUG __FILE__ ": INT data read - length = %d, data = ",
+ urb->actual_length);
+ for (i = 0; i < urb->actual_length; ++i) {
+ printk ("%.2x ", data[i]);
+ }
+ printk ("\n");
+ }
+#endif
+
+ return;
+}
+
+static void
+pl2303_read_bulk_callback (struct urb *urb)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ struct usb_serial *serial = get_usb_serial (port, "pl2303_read_bulk_callback");
+ struct tty_struct *tty;
+ unsigned char *data = urb->transfer_buffer;
+ int i;
+
+ if (!serial) {
+ return;
+ }
+
+// PL2303 mysteriously fails with -EPROTO reschedule the read
+ if (urb->status) {
+ urb->status = 0;
+ if (usb_submit_urb (urb))
+ dbg ("failed resubmitting read bulk urb");
+ return;
+ }
+
+ if (debug) {
+ if (urb->actual_length) {
+ printk (KERN_DEBUG __FILE__ ": BULK data read - length = %d,
+data = ",
+ urb->actual_length);
+ for (i = 0; i < urb->actual_length; ++i) {
+ printk ("%.2x ", data[i]);
+ }
+ printk ("\n");
+ }
+ }
+
+ tty = port->tty;
+ if (urb->actual_length) {
+ for (i = 0; i < urb->actual_length; ++i) {
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ dbg ("ARGH ------------ Flip buffer overrun...");
+
+ break;
+ }
+ tty_insert_flip_char (tty, data[i], 0);
+ }
+ tty_flip_buffer_push (tty);
+ }
+
+
+ /* Schedule the next read*/
+ if (usb_submit_urb (urb))
+ dbg ("failed submitting read bulk urb");
+
+ return;
+}
+
+
+
+static void
+pl2303_write_bulk_callback (struct urb *urb)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ struct usb_serial *serial;
+ struct tty_struct *tty = port->tty;
+
+ dbg ("pl2303_write_bulk_callback");
+
+
+ if (port_paranoia_check (port, "pl2303_write_bulk_callback")) {
+ return;
+ }
+
+ serial = port->serial;
+ if (serial_paranoia_check (serial, "pl2303_write_bulk_callback")) {
+ return;
+ }
+
+
+ if (urb->status) {
+ dbg ("Overflow in write");
+ dbg ("nonzero write bulk status received: %d", urb->status);
+ //need to resubmit frame;
+
+ port->write_urb->transfer_buffer_length = 1;
+
+ //Resubmit ourselves
+
+ if (usb_submit_urb (port->write_urb))
+ err ("usb_submit_urb(write bulk) failed");
+
+ return;
+ }
+
+ wake_up_interruptible (&port->write_wait);
+
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup) (tty);
+
+ wake_up_interruptible (&tty->write_wait);
+
+ start_xmit(port);
+
+ return;
+}
+
+
+
+static void
+start_xmit (struct usb_serial_port *port)
+{
+ struct usb_serial *serial;
+ struct pl2303_private *info;
+ unsigned long flags;
+
+ serial = port->serial;
+ info = (struct pl2303_private *)port->private;
+
+ if (info) {
+ PL2303_LOCK(port,flags);
+
+ if (port->write_urb->status != -EINPROGRESS) {
+ if (info->xmit_tail != info->xmit_head) {
+
+ memcpy (port->write_urb->transfer_buffer,
+&info->xmit_buf[info->xmit_tail],1);
+ info->xmit_cnt--;
+ info->xmit_tail = (info->xmit_tail + 1) &
+(SERIAL_XMIT_SIZE - 1);
+
+
+ port->write_urb->transfer_buffer_length = 1;
+
+
+ if (usb_submit_urb (port->write_urb))
+ err ("usb_submit_urb(write bulk) failed");
+
+
+ }
+ }
+
+ PL2303_UNLOCK(port,flags);
+ }
+}
+
+
+static int __init pl2303_init (void)
+{
+ usb_serial_register (&pl2303_device);
+ info(DRIVER_VERSION " : " DRIVER_DESC);
+ return 0;
+}
+
+
+static void __exit pl2303_exit (void)
+{
+ usb_serial_deregister (&pl2303_device);
+}
+
+
+module_init(pl2303_init);
+module_exit(pl2303_exit);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+
+MODULE_PARM(debug, "i");
+MODULE_PARM_DESC(debug, "Debug enabled or not");
+
