Linux-2.6.12-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!
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
new file mode 100644
index 0000000..50b63696
--- /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");