Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 781 insertions, 0 deletions

diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
new file mode 100644
index 00000000000..50b6369647d
--- /dev/null
+++ b/drivers/usb/serial/mct_u232.c
@@ -0,0 +1,781 @@
+/*
+ * MCT (Magic Control Technology Corp.) USB RS232 Converter Driver
+ *
+ *   Copyright (C) 2000 Wolfgang Grandegger (wolfgang@ces.ch)
+ *
+ *   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.
+ *
+ * This program is largely derived from the Belkin USB Serial Adapter Driver
+ * (see belkin_sa.[ch]). All of the information about the device was acquired
+ * by using SniffUSB on Windows98. For technical details see mct_u232.h.
+ *
+ * William G. Greathouse and Greg Kroah-Hartman provided great help on how to
+ * do the reverse engineering and how to write a USB serial device driver.
+ *
+ * TO BE DONE, TO BE CHECKED:
+ *   DTR/RTS signal handling may be incomplete or incorrect. I have mainly
+ *   implemented what I have seen with SniffUSB or found in belkin_sa.c.
+ *   For further TODOs check also belkin_sa.c.
+ *
+ * TEST STATUS:
+ *   Basic tests have been performed with minicom/zmodem transfers and
+ *   modem dialing under Linux 2.4.0-test10 (for me it works fine).
+ *
+ * 04-Nov-2003 Bill Marr <marr at flex dot com>
+ *   - Mimic Windows driver by sending 2 USB 'device request' messages
+ *     following normal 'baud rate change' message.  This allows data to be
+ *     transmitted to RS-232 devices which don't assert the 'CTS' signal.
+ *
+ * 10-Nov-2001 Wolfgang Grandegger
+ *   - Fixed an endianess problem with the baudrate selection for PowerPC.
+ *
+ * 06-Dec-2001 Martin Hamilton <martinh@gnu.org>
+ *	Added support for the Belkin F5U109 DB9 adaptor
+ *
+ * 30-May-2001 Greg Kroah-Hartman
+ *	switched from using spinlock to a semaphore, which fixes lots of problems.
+ *
+ * 04-May-2001 Stelian Pop
+ *   - Set the maximum bulk output size for Sitecom U232-P25 model to 16 bytes
+ *     instead of the device reported 32 (using 32 bytes causes many data
+ *     loss, Windows driver uses 16 too).
+ *
+ * 02-May-2001 Stelian Pop
+ *   - Fixed the baud calculation for Sitecom U232-P25 model
+ *
+ * 08-Apr-2001 gb
+ *   - Identify version on module load.
+ *
+ * 06-Jan-2001 Cornel Ciocirlan 
+ *   - Added support for Sitecom U232-P25 model (Product Id 0x0230)
+ *   - Added support for D-Link DU-H3SP USB BAY (Product Id 0x0200)
+ *
+ * 29-Nov-2000 Greg Kroah-Hartman
+ *   - Added device id table to fit with 2.4.0-test11 structure.
+ *   - took out DEAL_WITH_TWO_INT_IN_ENDPOINTS #define as it's not needed
+ *     (lots of things will change if/when the usb-serial core changes to
+ *     handle these issues.
+ *
+ * 27-Nov-2000 Wolfgang Grandegger
+ *   A version for kernel 2.4.0-test10 released to the Linux community 
+ *   (via linux-usb-devel).
+ */
+
+#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"
+#include "mct_u232.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "z2.0"		/* Linux in-kernel version */
+#define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>"
+#define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver"
+
+static int debug;
+
+/*
+ * Function prototypes
+ */
+static int  mct_u232_startup	         (struct usb_serial *serial);
+static void mct_u232_shutdown	         (struct usb_serial *serial);
+static int  mct_u232_open	         (struct usb_serial_port *port,
+					  struct file *filp);
+static void mct_u232_close	         (struct usb_serial_port *port,
+					  struct file *filp);
+static void mct_u232_read_int_callback   (struct urb *urb, struct pt_regs *regs);
+static void mct_u232_set_termios         (struct usb_serial_port *port,
+					  struct termios * old);
+static int  mct_u232_ioctl	         (struct usb_serial_port *port,
+					  struct file * file,
+					  unsigned int cmd,
+					  unsigned long arg);
+static void mct_u232_break_ctl	         (struct usb_serial_port *port,
+					  int break_state );
+static int  mct_u232_tiocmget		 (struct usb_serial_port *port,
+					  struct file *file);
+static int  mct_u232_tiocmset		 (struct usb_serial_port *port,
+					  struct file *file, unsigned int set,
+					  unsigned int clear);
+/*
+ * All of the device info needed for the MCT USB-RS232 converter.
+ */
+static struct usb_device_id id_table_combined [] = {
+	{ USB_DEVICE(MCT_U232_VID, MCT_U232_PID) },
+	{ USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) },
+	{ USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) },
+	{ USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) },
+	{ }		/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, id_table_combined);
+
+static struct usb_driver mct_u232_driver = {
+	.owner =	THIS_MODULE,
+	.name =		"mct_u232",
+	.probe =	usb_serial_probe,
+	.disconnect =	usb_serial_disconnect,
+	.id_table =	id_table_combined,
+};
+
+static struct usb_serial_device_type mct_u232_device = {
+	.owner =	     THIS_MODULE,
+	.name =		     "MCT U232",
+	.short_name =	     "mct_u232",
+	.id_table =	     id_table_combined,
+	.num_interrupt_in =  2,
+	.num_bulk_in =	     0,
+	.num_bulk_out =	     1,
+	.num_ports =	     1,
+	.open =		     mct_u232_open,
+	.close =	     mct_u232_close,
+	.read_int_callback = mct_u232_read_int_callback,
+	.ioctl =	     mct_u232_ioctl,
+	.set_termios =	     mct_u232_set_termios,
+	.break_ctl =	     mct_u232_break_ctl,
+	.tiocmget =	     mct_u232_tiocmget,
+	.tiocmset =	     mct_u232_tiocmset,
+	.attach =	     mct_u232_startup,
+	.shutdown =	     mct_u232_shutdown,
+};
+
+
+struct mct_u232_private {
+	spinlock_t lock;
+	unsigned int	     control_state; /* Modem Line Setting (TIOCM) */
+	unsigned char        last_lcr;      /* Line Control Register */
+	unsigned char	     last_lsr;      /* Line Status Register */
+	unsigned char	     last_msr;      /* Modem Status Register */
+};
+
+/*
+ * Handle vendor specific USB requests
+ */
+
+#define WDR_TIMEOUT 5000 /* default urb timeout */
+
+/*
+ * Later day 2.6.0-test kernels have new baud rates like B230400 which
+ * we do not know how to support. We ignore them for the moment.
+ * XXX Rate-limit the error message, it's user triggerable.
+ */
+static int mct_u232_calculate_baud_rate(struct usb_serial *serial, int value)
+{
+	if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID
+	  || le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) {
+		switch (value) {
+		case    B300: return 0x01;
+		case    B600: return 0x02; /* this one not tested */
+		case   B1200: return 0x03;
+		case   B2400: return 0x04;
+		case   B4800: return 0x06;
+		case   B9600: return 0x08;
+		case  B19200: return 0x09;
+		case  B38400: return 0x0a;
+		case  B57600: return 0x0b;
+		case B115200: return 0x0c;
+		default:
+			err("MCT USB-RS232: unsupported baudrate request 0x%x,"
+			    " using default of B9600", value);
+			return 0x08;
+		}
+	} else {
+		switch (value) {
+		case    B300: value =     300; break;
+		case    B600: value =     600; break;
+		case   B1200: value =    1200; break;
+		case   B2400: value =    2400; break;
+		case   B4800: value =    4800; break;
+		case   B9600: value =    9600; break;
+		case  B19200: value =   19200; break;
+		case  B38400: value =   38400; break;
+		case  B57600: value =   57600; break;
+		case B115200: value =  115200; break;
+		default:
+			err("MCT USB-RS232: unsupported baudrate request 0x%x,"
+			    " using default of B9600", value);
+			value = 9600;
+		}
+		return 115200/value;
+	}
+}
+
+static int mct_u232_set_baud_rate(struct usb_serial *serial, int value)
+{
+	__le32 divisor;
+        int rc;
+        unsigned char zero_byte = 0;
+
+	divisor = cpu_to_le32(mct_u232_calculate_baud_rate(serial, value));
+
+        rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+                             MCT_U232_SET_BAUD_RATE_REQUEST,
+			     MCT_U232_SET_REQUEST_TYPE,
+                             0, 0, &divisor, MCT_U232_SET_BAUD_RATE_SIZE,
+			     WDR_TIMEOUT);
+	if (rc < 0)
+		err("Set BAUD RATE %d failed (error = %d)", value, rc);
+	dbg("set_baud_rate: value: 0x%x, divisor: 0x%x", value, divisor);
+
+	/* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which
+	   always sends two extra USB 'device request' messages after the
+	   'baud rate change' message.  The actual functionality of the
+	   request codes in these messages is not fully understood but these
+	   particular codes are never seen in any operation besides a baud
+	   rate change.  Both of these messages send a single byte of data
+	   whose value is always zero.  The second of these two extra messages
+	   is required in order for data to be properly written to an RS-232
+	   device which does not assert the 'CTS' signal. */
+
+	rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+			     MCT_U232_SET_UNKNOWN1_REQUEST, 
+			     MCT_U232_SET_REQUEST_TYPE,
+			     0, 0, &zero_byte, MCT_U232_SET_UNKNOWN1_SIZE, 
+			     WDR_TIMEOUT);
+	if (rc < 0)
+		err("Sending USB device request code %d failed (error = %d)", 
+		    MCT_U232_SET_UNKNOWN1_REQUEST, rc);
+
+	rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+			     MCT_U232_SET_UNKNOWN2_REQUEST, 
+			     MCT_U232_SET_REQUEST_TYPE,
+			     0, 0, &zero_byte, MCT_U232_SET_UNKNOWN2_SIZE, 
+			     WDR_TIMEOUT);
+	if (rc < 0)
+		err("Sending USB device request code %d failed (error = %d)", 
+		    MCT_U232_SET_UNKNOWN2_REQUEST, rc);
+
+        return rc;
+} /* mct_u232_set_baud_rate */
+
+static int mct_u232_set_line_ctrl(struct usb_serial *serial, unsigned char lcr)
+{
+        int rc;
+        rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+                             MCT_U232_SET_LINE_CTRL_REQUEST,
+			     MCT_U232_SET_REQUEST_TYPE,
+                             0, 0, &lcr, MCT_U232_SET_LINE_CTRL_SIZE,
+			     WDR_TIMEOUT);
+	if (rc < 0)
+		err("Set LINE CTRL 0x%x failed (error = %d)", lcr, rc);
+	dbg("set_line_ctrl: 0x%x", lcr);
+        return rc;
+} /* mct_u232_set_line_ctrl */
+
+static int mct_u232_set_modem_ctrl(struct usb_serial *serial,
+				   unsigned int control_state)
+{
+        int rc;
+	unsigned char mcr = MCT_U232_MCR_NONE;
+
+	if (control_state & TIOCM_DTR)
+		mcr |= MCT_U232_MCR_DTR;
+	if (control_state & TIOCM_RTS)
+		mcr |= MCT_U232_MCR_RTS;
+
+        rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+                             MCT_U232_SET_MODEM_CTRL_REQUEST,
+			     MCT_U232_SET_REQUEST_TYPE,
+                             0, 0, &mcr, MCT_U232_SET_MODEM_CTRL_SIZE,
+			     WDR_TIMEOUT);
+	if (rc < 0)
+		err("Set MODEM CTRL 0x%x failed (error = %d)", mcr, rc);
+	dbg("set_modem_ctrl: state=0x%x ==> mcr=0x%x", control_state, mcr);
+
+        return rc;
+} /* mct_u232_set_modem_ctrl */
+
+static int mct_u232_get_modem_stat(struct usb_serial *serial, unsigned char *msr)
+{
+        int rc;
+        rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+                             MCT_U232_GET_MODEM_STAT_REQUEST,
+			     MCT_U232_GET_REQUEST_TYPE,
+                             0, 0, msr, MCT_U232_GET_MODEM_STAT_SIZE,
+			     WDR_TIMEOUT);
+	if (rc < 0) {
+		err("Get MODEM STATus failed (error = %d)", rc);
+		*msr = 0;
+	}
+	dbg("get_modem_stat: 0x%x", *msr);
+        return rc;
+} /* mct_u232_get_modem_stat */
+
+static void mct_u232_msr_to_state(unsigned int *control_state, unsigned char msr)
+{
+ 	/* Translate Control Line states */
+	if (msr & MCT_U232_MSR_DSR)
+		*control_state |=  TIOCM_DSR;
+	else
+		*control_state &= ~TIOCM_DSR;
+	if (msr & MCT_U232_MSR_CTS)
+		*control_state |=  TIOCM_CTS;
+	else
+		*control_state &= ~TIOCM_CTS;
+	if (msr & MCT_U232_MSR_RI)
+		*control_state |=  TIOCM_RI;
+	else
+		*control_state &= ~TIOCM_RI;
+	if (msr & MCT_U232_MSR_CD)
+		*control_state |=  TIOCM_CD;
+	else
+		*control_state &= ~TIOCM_CD;
+ 	dbg("msr_to_state: msr=0x%x ==> state=0x%x", msr, *control_state);
+} /* mct_u232_msr_to_state */
+
+/*
+ * Driver's tty interface functions
+ */
+
+static int mct_u232_startup (struct usb_serial *serial)
+{
+	struct mct_u232_private *priv;
+	struct usb_serial_port *port, *rport;
+
+	priv = kmalloc(sizeof(struct mct_u232_private), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	memset(priv, 0, sizeof(struct mct_u232_private));
+	spin_lock_init(&priv->lock);
+	usb_set_serial_port_data(serial->port[0], priv);
+
+	init_waitqueue_head(&serial->port[0]->write_wait);
+
+	/* Puh, that's dirty */
+	port = serial->port[0];
+	rport = serial->port[1];
+	if (port->read_urb) {
+		/* No unlinking, it wasn't submitted yet. */
+		usb_free_urb(port->read_urb);
+	}
+	port->read_urb = rport->interrupt_in_urb;
+	rport->interrupt_in_urb = NULL;
+	port->read_urb->context = port;
+
+	return (0);
+} /* mct_u232_startup */
+
+
+static void mct_u232_shutdown (struct usb_serial *serial)
+{
+	struct mct_u232_private *priv;
+	int i;
+	
+	dbg("%s", __FUNCTION__);
+
+	for (i=0; i < serial->num_ports; ++i) {
+		/* My special items, the standard routines free my urbs */
+		priv = usb_get_serial_port_data(serial->port[i]);
+		if (priv) {
+			usb_set_serial_port_data(serial->port[i], NULL);
+			kfree(priv);
+		}
+	}
+} /* mct_u232_shutdown */
+
+static int  mct_u232_open (struct usb_serial_port *port, struct file *filp)
+{
+	struct usb_serial *serial = port->serial;
+	struct mct_u232_private *priv = usb_get_serial_port_data(port);
+	int retval = 0;
+	unsigned int control_state;
+	unsigned long flags;
+	unsigned char last_lcr;
+	unsigned char last_msr;
+
+	dbg("%s port %d", __FUNCTION__, port->number);
+
+	/* Compensate for a hardware bug: although the Sitecom U232-P25
+	 * device reports a maximum output packet size of 32 bytes,
+	 * it seems to be able to accept only 16 bytes (and that's what
+	 * SniffUSB says too...)
+	 */
+	if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID)
+		port->bulk_out_size = 16;
+
+	/* Do a defined restart: the normal serial device seems to 
+	 * always turn on DTR and RTS here, so do the same. I'm not
+	 * sure if this is really necessary. But it should not harm
+	 * either.
+	 */
+	spin_lock_irqsave(&priv->lock, flags);
+	if (port->tty->termios->c_cflag & CBAUD)
+		priv->control_state = TIOCM_DTR | TIOCM_RTS;
+	else
+		priv->control_state = 0;
+	
+	priv->last_lcr = (MCT_U232_DATA_BITS_8 | 
+			  MCT_U232_PARITY_NONE |
+			  MCT_U232_STOP_BITS_1);
+	control_state = priv->control_state;
+	last_lcr = priv->last_lcr;
+	spin_unlock_irqrestore(&priv->lock, flags);
+	mct_u232_set_modem_ctrl(serial, control_state);
+	mct_u232_set_line_ctrl(serial, last_lcr);
+
+	/* Read modem status and update control state */
+	mct_u232_get_modem_stat(serial, &last_msr);
+	spin_lock_irqsave(&priv->lock, flags);
+	priv->last_msr = last_msr;
+	mct_u232_msr_to_state(&priv->control_state, priv->last_msr);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	port->read_urb->dev = port->serial->dev;
+	retval = usb_submit_urb(port->read_urb, GFP_KERNEL);
+	if (retval) {
+		err("usb_submit_urb(read bulk) failed pipe 0x%x err %d",
+		    port->read_urb->pipe, retval);
+		goto exit;
+	}
+
+	port->interrupt_in_urb->dev = port->serial->dev;
+	retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
+	if (retval)
+		err(" usb_submit_urb(read int) failed pipe 0x%x err %d",
+		    port->interrupt_in_urb->pipe, retval);
+
+exit:
+	return 0;
+} /* mct_u232_open */
+
+
+static void mct_u232_close (struct usb_serial_port *port, struct file *filp)
+{
+	dbg("%s port %d", __FUNCTION__, port->number);
+
+	if (port->serial->dev) {
+		/* shutdown our urbs */
+		usb_kill_urb(port->write_urb);
+		usb_kill_urb(port->read_urb);
+		usb_kill_urb(port->interrupt_in_urb);
+	}
+} /* mct_u232_close */
+
+
+static void mct_u232_read_int_callback (struct urb *urb, struct pt_regs *regs)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+	struct mct_u232_private *priv = usb_get_serial_port_data(port);
+	struct usb_serial *serial = port->serial;
+	struct tty_struct *tty;
+	unsigned char *data = urb->transfer_buffer;
+	int status;
+	unsigned long flags;
+
+	switch (urb->status) {
+	case 0:
+		/* success */
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		/* this urb is terminated, clean up */
+		dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
+		return;
+	default:
+		dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
+		goto exit;
+	}
+
+	if (!serial) {
+		dbg("%s - bad serial pointer, exiting", __FUNCTION__);
+		return;
+	}
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+	usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
+
+	/*
+	 * Work-a-round: handle the 'usual' bulk-in pipe here
+	 */
+	if (urb->transfer_buffer_length > 2) {
+		int i;
+		tty = port->tty;
+		if (urb->actual_length) {
+			for (i = 0; i < urb->actual_length ; ++i) {
+				tty_insert_flip_char(tty, data[i], 0);
+			}
+			tty_flip_buffer_push(tty);
+		}
+		goto exit;
+	}
+	
+	/*
+	 * The interrupt-in pipe signals exceptional conditions (modem line
+	 * signal changes and errors). data[0] holds MSR, data[1] holds LSR.
+	 */
+	spin_lock_irqsave(&priv->lock, flags);
+	priv->last_msr = data[MCT_U232_MSR_INDEX];
+	
+	/* Record Control Line states */
+	mct_u232_msr_to_state(&priv->control_state, priv->last_msr);
+
+#if 0
+	/* Not yet handled. See belin_sa.c for further information */
+	/* Now to report any errors */
+	priv->last_lsr = data[MCT_U232_LSR_INDEX];
+	/*
+	 * fill in the flip buffer here, but I do not know the relation
+	 * to the current/next receive buffer or characters.  I need
+	 * to look in to this before committing any code.
+	 */
+	if (priv->last_lsr & MCT_U232_LSR_ERR) {
+		tty = port->tty;
+		/* Overrun Error */
+		if (priv->last_lsr & MCT_U232_LSR_OE) {
+		}
+		/* Parity Error */
+		if (priv->last_lsr & MCT_U232_LSR_PE) {
+		}
+		/* Framing Error */
+		if (priv->last_lsr & MCT_U232_LSR_FE) {
+		}
+		/* Break Indicator */
+		if (priv->last_lsr & MCT_U232_LSR_BI) {
+		}
+	}
+#endif
+	spin_unlock_irqrestore(&priv->lock, flags);
+exit:
+	status = usb_submit_urb (urb, GFP_ATOMIC);
+	if (status)
+		err ("%s - usb_submit_urb failed with result %d",
+		     __FUNCTION__, status);
+} /* mct_u232_read_int_callback */
+
+static void mct_u232_set_termios (struct usb_serial_port *port,
+				  struct termios *old_termios)
+{
+	struct usb_serial *serial = port->serial;
+	struct mct_u232_private *priv = usb_get_serial_port_data(port);
+	unsigned int iflag = port->tty->termios->c_iflag;
+	unsigned int cflag = port->tty->termios->c_cflag;
+	unsigned int old_cflag = old_termios->c_cflag;
+	unsigned long flags;
+	unsigned int control_state, new_state;
+	unsigned char last_lcr;
+
+	/* get a local copy of the current port settings */
+	spin_lock_irqsave(&priv->lock, flags);
+	control_state = priv->control_state;
+	spin_unlock_irqrestore(&priv->lock, flags);
+	last_lcr = 0;
+
+	/*
+	 * Update baud rate.
+	 * Do not attempt to cache old rates and skip settings,
+	 * disconnects screw such tricks up completely.
+	 * Premature optimization is the root of all evil.
+	 */
+
+        /* reassert DTR and (maybe) RTS on transition from B0 */
+	if ((old_cflag & CBAUD) == B0) {
+		dbg("%s: baud was B0", __FUNCTION__);
+		control_state |= TIOCM_DTR;
+		/* don't set RTS if using hardware flow control */
+		if (!(old_cflag & CRTSCTS)) {
+			control_state |= TIOCM_RTS;
+		}
+		mct_u232_set_modem_ctrl(serial, control_state);
+	}
+
+	mct_u232_set_baud_rate(serial, cflag & CBAUD);
+
+	if ((cflag & CBAUD) == B0 ) {
+		dbg("%s: baud is B0", __FUNCTION__);
+		/* Drop RTS and DTR */
+		control_state &= ~(TIOCM_DTR | TIOCM_RTS);
+       		mct_u232_set_modem_ctrl(serial, control_state);
+	}
+
+	/*
+	 * Update line control register (LCR)
+	 */
+
+	/* set the parity */
+	if (cflag & PARENB)
+		last_lcr |= (cflag & PARODD) ?
+			MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
+	else
+		last_lcr |= MCT_U232_PARITY_NONE;
+
+	/* set the number of data bits */
+	switch (cflag & CSIZE) {
+	case CS5:
+		last_lcr |= MCT_U232_DATA_BITS_5; break;
+	case CS6:
+		last_lcr |= MCT_U232_DATA_BITS_6; break;
+	case CS7:
+		last_lcr |= MCT_U232_DATA_BITS_7; break;
+	case CS8:
+		last_lcr |= MCT_U232_DATA_BITS_8; break;
+	default:
+		err("CSIZE was not CS5-CS8, using default of 8");
+		last_lcr |= MCT_U232_DATA_BITS_8;
+		break;
+	}
+
+	/* set the number of stop bits */
+	last_lcr |= (cflag & CSTOPB) ?
+		MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
+
+	mct_u232_set_line_ctrl(serial, last_lcr);
+
+	/*
+	 * Set flow control: well, I do not really now how to handle DTR/RTS.
+	 * Just do what we have seen with SniffUSB on Win98.
+	 */
+	/* Drop DTR/RTS if no flow control otherwise assert */
+	new_state = control_state;
+	if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS))
+		new_state |= TIOCM_DTR | TIOCM_RTS;
+	else
+		new_state &= ~(TIOCM_DTR | TIOCM_RTS);
+	if (new_state != control_state) {
+		mct_u232_set_modem_ctrl(serial, new_state);
+		control_state = new_state;
+	}
+
+	/* save off the modified port settings */
+	spin_lock_irqsave(&priv->lock, flags);
+	priv->control_state = control_state;
+	priv->last_lcr = last_lcr;
+	spin_unlock_irqrestore(&priv->lock, flags);
+} /* mct_u232_set_termios */
+
+static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state )
+{
+	struct usb_serial *serial = port->serial;
+	struct mct_u232_private *priv = usb_get_serial_port_data(port);
+	unsigned char lcr;
+	unsigned long flags;
+
+	dbg("%sstate=%d", __FUNCTION__, break_state);
+
+	spin_lock_irqsave(&priv->lock, flags);
+	lcr = priv->last_lcr;
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	if (break_state)
+		lcr |= MCT_U232_SET_BREAK;
+
+	mct_u232_set_line_ctrl(serial, lcr);
+} /* mct_u232_break_ctl */
+
+
+static int mct_u232_tiocmget (struct usb_serial_port *port, struct file *file)
+{
+	struct mct_u232_private *priv = usb_get_serial_port_data(port);
+	unsigned int control_state;
+	unsigned long flags;
+	
+	dbg("%s", __FUNCTION__);
+
+	spin_lock_irqsave(&priv->lock, flags);
+	control_state = priv->control_state;
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return control_state;
+}
+
+static int mct_u232_tiocmset (struct usb_serial_port *port, struct file *file,
+			      unsigned int set, unsigned int clear)
+{
+	struct usb_serial *serial = port->serial;
+	struct mct_u232_private *priv = usb_get_serial_port_data(port);
+	unsigned int control_state;
+	unsigned long flags;
+	
+	dbg("%s", __FUNCTION__);
+
+	spin_lock_irqsave(&priv->lock, flags);
+	control_state = priv->control_state;
+
+	if (set & TIOCM_RTS)
+		control_state |= TIOCM_RTS;
+	if (set & TIOCM_DTR)
+		control_state |= TIOCM_DTR;
+	if (clear & TIOCM_RTS)
+		control_state &= ~TIOCM_RTS;
+	if (clear & TIOCM_DTR)
+		control_state &= ~TIOCM_DTR;
+
+	priv->control_state = control_state;
+	spin_unlock_irqrestore(&priv->lock, flags);
+	return mct_u232_set_modem_ctrl(serial, control_state);
+}
+
+static int mct_u232_ioctl (struct usb_serial_port *port, struct file * file,
+			   unsigned int cmd, unsigned long arg)
+{
+	dbg("%scmd=0x%x", __FUNCTION__, cmd);
+
+	/* Based on code from acm.c and others */
+	switch (cmd) {
+	case TIOCMIWAIT:
+		/* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
+		/* TODO */
+		return( 0 );
+
+	case TIOCGICOUNT:
+		/* return count of modemline transitions */
+		/* TODO */
+		return 0;
+
+	default:
+		dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd);
+		return(-ENOIOCTLCMD);
+		break;
+	}
+	return 0;
+} /* mct_u232_ioctl */
+
+
+static int __init mct_u232_init (void)
+{
+	int retval;
+	retval = usb_serial_register(&mct_u232_device);
+	if (retval)
+		goto failed_usb_serial_register;
+	retval = usb_register(&mct_u232_driver);
+	if (retval)
+		goto failed_usb_register;
+	info(DRIVER_DESC " " DRIVER_VERSION);
+	return 0;
+failed_usb_register:
+	usb_serial_deregister(&mct_u232_device);
+failed_usb_serial_register:
+	return retval;
+}
+
+
+static void __exit mct_u232_exit (void)
+{
+	usb_deregister (&mct_u232_driver);
+	usb_serial_deregister (&mct_u232_device);
+}
+
+
+module_init (mct_u232_init);
+module_exit(mct_u232_exit);
+
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");