mct_u232.c
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- /*
- * 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).
- *
- * 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/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"
- #include "mct_u232.h"
- /*
- * Version Information
- */
- #define DRIVER_VERSION "v1.1"
- #define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>"
- #define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver"
- /*
- * Some not properly written applications do not handle the return code of
- * write() correctly. This can result in character losses. A work-a-round
- * can be compiled in with the following definition. This work-a-round
- * should _NOT_ be part of an 'official' kernel release, of course!
- */
- #undef FIX_WRITE_RETURN_CODE_PROBLEM
- #ifdef FIX_WRITE_RETURN_CODE_PROBLEM
- static int write_blocking; /* disabled by default */
- #endif
- /*
- * 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);
- #ifdef FIX_WRITE_RETURN_CODE_PROBLEM
- static int mct_u232_write (struct usb_serial_port *port,
- int from_user,
- const unsigned char *buf,
- int count);
- static void mct_u232_write_bulk_callback (struct urb *urb);
- #endif
- static void mct_u232_read_int_callback (struct urb *urb);
- 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 );
- /*
- * All of the device info needed for the MCT USB-RS232 converter.
- */
- static __devinitdata 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 */
- };
- static __devinitdata struct usb_device_id mct_u232_table [] = {
- { USB_DEVICE(MCT_U232_VID, MCT_U232_PID) },
- { USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) },
- { } /* Terminating entry */
- };
- static __devinitdata struct usb_device_id mct_u232_sitecom_table [] = {
- { USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) },
- { } /* Terminating entry */
- };
- static __devinitdata struct usb_device_id mct_u232_du_h3sp_table [] = {
- { USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) },
- { } /* Terminating entry */
- };
- MODULE_DEVICE_TABLE (usb, id_table_combined);
- static struct usb_serial_device_type mct_u232_device = {
- name: "Magic Control Technology USB-RS232",
- id_table: mct_u232_table,
- needs_interrupt_in: MUST_HAVE, /* 2 interrupt-in endpoints */
- needs_bulk_in: MUST_HAVE_NOT, /* no bulk-in endpoint */
- needs_bulk_out: MUST_HAVE, /* 1 bulk-out endpoint */
- num_interrupt_in: 2,
- num_bulk_in: 0,
- num_bulk_out: 1,
- num_ports: 1,
- open: mct_u232_open,
- close: mct_u232_close,
- #ifdef FIX_WRITE_RETURN_CODE_PROBLEM
- write: mct_u232_write,
- write_bulk_callback: mct_u232_write_bulk_callback,
- #endif
- read_int_callback: mct_u232_read_int_callback,
- ioctl: mct_u232_ioctl,
- set_termios: mct_u232_set_termios,
- break_ctl: mct_u232_break_ctl,
- startup: mct_u232_startup,
- shutdown: mct_u232_shutdown,
- };
- static struct usb_serial_device_type mct_u232_sitecom_device = {
- name: "MCT/Sitecom USB-RS232",
- id_table: mct_u232_sitecom_table,
- needs_interrupt_in: MUST_HAVE, /* 2 interrupt-in endpoints */
- needs_bulk_in: MUST_HAVE_NOT, /* no bulk-in endpoint */
- needs_bulk_out: MUST_HAVE, /* 1 bulk-out endpoint */
- num_interrupt_in: 2,
- num_bulk_in: 0,
- num_bulk_out: 1,
- num_ports: 1,
- open: mct_u232_open,
- close: mct_u232_close,
- #ifdef FIX_WRITE_RETURN_CODE_PROBLEM
- write: mct_u232_write,
- write_bulk_callback: mct_u232_write_bulk_callback,
- #endif
- read_int_callback: mct_u232_read_int_callback,
- ioctl: mct_u232_ioctl,
- set_termios: mct_u232_set_termios,
- break_ctl: mct_u232_break_ctl,
- startup: mct_u232_startup,
- shutdown: mct_u232_shutdown,
- };
- static struct usb_serial_device_type mct_u232_du_h3sp_device = {
- name: "MCT/D-Link DU-H3SP USB BAY",
- id_table: mct_u232_du_h3sp_table,
- needs_interrupt_in: MUST_HAVE, /* 2 interrupt-in endpoints */
- needs_bulk_in: MUST_HAVE_NOT, /* no bulk-in endpoint */
- needs_bulk_out: MUST_HAVE, /* 1 bulk-out endpoint */
- num_interrupt_in: 2,
- num_bulk_in: 0,
- num_bulk_out: 1,
- num_ports: 1,
- open: mct_u232_open,
- close: mct_u232_close,
- #ifdef FIX_WRITE_RETURN_CODE_PROBLEM
- write: mct_u232_write,
- write_bulk_callback: mct_u232_write_bulk_callback,
- #endif
- read_int_callback: mct_u232_read_int_callback,
- ioctl: mct_u232_ioctl,
- set_termios: mct_u232_set_termios,
- break_ctl: mct_u232_break_ctl,
- startup: mct_u232_startup,
- shutdown: mct_u232_shutdown,
- };
- struct mct_u232_private {
- unsigned long 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 (HZ * 5 ) /* default urb timeout */
- static int mct_u232_calculate_baud_rate(struct usb_serial *serial, int value) {
- if (serial->dev->descriptor.idProduct == MCT_U232_SITECOM_PID
- || serial->dev->descriptor.idProduct == MCT_U232_BELKIN_F5U109_PID) {
- switch (value) {
- case 300: return 0x01;
- case 600: return 0x02; /* this one not tested */
- case 1200: return 0x03;
- case 2400: return 0x04;
- case 4800: return 0x06;
- case 9600: return 0x08;
- case 19200: return 0x09;
- case 38400: return 0x0a;
- case 57600: return 0x0b;
- case 115200: return 0x0c;
- default: return -1; /* normally not reached */
- }
- }
- else
- return MCT_U232_BAUD_RATE(value);
- }
- static int mct_u232_set_baud_rate(struct usb_serial *serial, int value)
- {
- unsigned int divisor;
- int rc;
- 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: %d, divisor: 0x%x", value, divisor);
- 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 long 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%lx ==> 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 long *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%lx", 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;
- /* allocate the private data structure */
- serial->port->private = kmalloc(sizeof(struct mct_u232_private),
- GFP_KERNEL);
- if (!serial->port->private)
- return (-1); /* error */
- priv = (struct mct_u232_private *)serial->port->private;
- /* set initial values for control structures */
- priv->control_state = 0;
- priv->last_lsr = 0;
- priv->last_msr = 0;
- init_waitqueue_head(&serial->port->write_wait);
-
- return (0);
- } /* mct_u232_startup */
- static void mct_u232_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) {
- mct_u232_close (&serial->port[i], NULL);
- }
- /* My special items, the standard routines free my urbs */
- if (serial->port[i].private)
- kfree(serial->port[i].private);
- }
- } /* 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 = (struct mct_u232_private *)port->private;
- int retval = 0;
- dbg(__FUNCTION__" port %d", port->number);
- down (&port->sem);
-
- ++port->open_count;
- MOD_INC_USE_COUNT;
- if (!port->active) {
- port->active = 1;
- /* 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 (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.
- */
- if (port->tty->termios->c_cflag & CBAUD)
- priv->control_state = TIOCM_DTR | TIOCM_RTS;
- else
- priv->control_state = 0;
- mct_u232_set_modem_ctrl(serial, priv->control_state);
-
- priv->last_lcr = (MCT_U232_DATA_BITS_8 |
- MCT_U232_PARITY_NONE |
- MCT_U232_STOP_BITS_1);
- mct_u232_set_line_ctrl(serial, priv->last_lcr);
- /* Read modem status and update control state */
- mct_u232_get_modem_stat(serial, &priv->last_msr);
- mct_u232_msr_to_state(&priv->control_state, priv->last_msr);
- {
- /* Puh, that's dirty */
- struct usb_serial_port *rport;
- rport = &serial->port[1];
- rport->tty = port->tty;
- rport->private = port->private;
- port->read_urb = rport->interrupt_in_urb;
- }
- port->read_urb->dev = port->serial->dev;
- retval = usb_submit_urb(port->read_urb);
- if (retval) {
- err("usb_submit_urb(read bulk) failed");
- goto exit;
- }
- port->interrupt_in_urb->dev = port->serial->dev;
- retval = usb_submit_urb(port->interrupt_in_urb);
- if (retval)
- err(" usb_submit_urb(read int) failed");
- }
- exit:
- up (&port->sem);
-
- return 0;
- } /* mct_u232_open */
- static void mct_u232_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) {
- if (port->serial->dev) {
- /* shutdown our urbs */
- usb_unlink_urb (port->write_urb);
- usb_unlink_urb (port->read_urb);
- usb_unlink_urb (port->interrupt_in_urb);
- }
- port->active = 0;
- }
-
- up (&port->sem);
- MOD_DEC_USE_COUNT;
- } /* mct_u232_close */
- #ifdef FIX_WRITE_RETURN_CODE_PROBLEM
- /* The generic routines work fine otherwise */
- static int mct_u232_write (struct usb_serial_port *port, int from_user,
- const unsigned char *buf, int count)
- {
- struct usb_serial *serial = port->serial;
- int result, bytes_sent, size;
- dbg(__FUNCTION__ " - port %d", port->number);
- if (count == 0) {
- dbg(__FUNCTION__ " - write request of 0 bytes");
- return (0);
- }
- /* only do something if we have a bulk out endpoint */
- if (!serial->num_bulk_out)
- return(0);;
-
- /* another write is still pending? */
- if (port->write_urb->status == -EINPROGRESS) {
- dbg (__FUNCTION__ " - already writing");
- return (0);
- }
-
- bytes_sent = 0;
- while (count > 0) {
-
- down (&port->sem);
-
- size = (count > port->bulk_out_size) ? port->bulk_out_size : count;
-
- usb_serial_debug_data (__FILE__, __FUNCTION__, size, buf);
-
- if (from_user) {
- if (copy_from_user(port->write_urb->transfer_buffer, buf, size)) {
- up (&port->sem);
- return -EFAULT;
- }
- }
- else {
- memcpy (port->write_urb->transfer_buffer, buf, size);
- }
-
- /* 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, size,
- ((serial->type->write_bulk_callback) ?
- serial->type->write_bulk_callback :
- mct_u232_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);
- up (&port->sem);
- return result;
- }
- up (&port->sem);
- bytes_sent += size;
- if (write_blocking)
- interruptible_sleep_on(&port->write_wait);
- else
- break;
- buf += size;
- count -= size;
- }
-
- return bytes_sent;
- } /* mct_u232_write */
- static void mct_u232_write_bulk_callback (struct urb *urb)
- {
- struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
- struct usb_serial *serial = port->serial;
- struct tty_struct *tty = port->tty;
- 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;
- }
- if (write_blocking) {
- 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);
-
- } else {
- /* from generic_write_bulk_callback */
- queue_task(&port->tqueue, &tq_immediate);
- mark_bh(IMMEDIATE_BH);
- }
- return;
- } /* mct_u232_write_bulk_callback */
- #endif
- static void mct_u232_read_int_callback (struct urb *urb)
- {
- struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
- struct mct_u232_private *priv = (struct mct_u232_private *)port->private;
- struct usb_serial *serial = port->serial;
- struct tty_struct *tty;
- unsigned char *data = urb->transfer_buffer;
- dbg(__FUNCTION__ " - port %d", port->number);
- /* The urb might have been killed. */
- if (urb->status) {
- dbg(__FUNCTION__ " - nonzero read bulk status received: %d",
- urb->status);
- return;
- }
- if (!serial) {
- dbg(__FUNCTION__ " - bad serial pointer, exiting");
- return;
- }
-
- usb_serial_debug_data (__FILE__, __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);
- }
- /* INT urbs are automatically re-submitted */
- return;
- }
-
- /*
- * The interrupt-in pipe signals exceptional conditions (modem line
- * signal changes and errors). data[0] holds MSR, data[1] holds LSR.
- */
- 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
- /* INT urbs are automatically re-submitted */
- } /* 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 = (struct mct_u232_private *)port->private;
- unsigned int iflag = port->tty->termios->c_iflag;
- unsigned int old_iflag = old_termios->c_iflag;
- unsigned int cflag = port->tty->termios->c_cflag;
- unsigned int old_cflag = old_termios->c_cflag;
-
- /*
- * Update baud rate
- */
- if( (cflag & CBAUD) != (old_cflag & CBAUD) ) {
- /* reassert DTR and (maybe) RTS on transition from B0 */
- if( (old_cflag & CBAUD) == B0 ) {
- dbg(__FUNCTION__ ": baud was B0");
- priv->control_state |= TIOCM_DTR;
- /* don't set RTS if using hardware flow control */
- if (!(old_cflag & CRTSCTS)) {
- priv->control_state |= TIOCM_RTS;
- }
- mct_u232_set_modem_ctrl(serial, priv->control_state);
- }
-
- switch(cflag & CBAUD) {
- case B0: /* handled below */
- break;
- case B300: mct_u232_set_baud_rate(serial, 300);
- break;
- case B600: mct_u232_set_baud_rate(serial, 600);
- break;
- case B1200: mct_u232_set_baud_rate(serial, 1200);
- break;
- case B2400: mct_u232_set_baud_rate(serial, 2400);
- break;
- case B4800: mct_u232_set_baud_rate(serial, 4800);
- break;
- case B9600: mct_u232_set_baud_rate(serial, 9600);
- break;
- case B19200: mct_u232_set_baud_rate(serial, 19200);
- break;
- case B38400: mct_u232_set_baud_rate(serial, 38400);
- break;
- case B57600: mct_u232_set_baud_rate(serial, 57600);
- break;
- case B115200: mct_u232_set_baud_rate(serial, 115200);
- break;
- default: err("MCT USB-RS232 converter: unsupported baudrate request, using default of 9600");
- mct_u232_set_baud_rate(serial, 9600); break;
- }
- if ((cflag & CBAUD) == B0 ) {
- dbg(__FUNCTION__ ": baud is B0");
- /* Drop RTS and DTR */
- priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
- mct_u232_set_modem_ctrl(serial, priv->control_state);
- }
- }
- /*
- * Update line control register (LCR)
- */
- if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
- || (cflag & CSIZE) != (old_cflag & CSIZE)
- || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) {
-
- priv->last_lcr = 0;
- /* set the parity */
- if (cflag & PARENB)
- priv->last_lcr |= (cflag & PARODD) ?
- MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
- else
- priv->last_lcr |= MCT_U232_PARITY_NONE;
- /* set the number of data bits */
- switch (cflag & CSIZE) {
- case CS5:
- priv->last_lcr |= MCT_U232_DATA_BITS_5; break;
- case CS6:
- priv->last_lcr |= MCT_U232_DATA_BITS_6; break;
- case CS7:
- priv->last_lcr |= MCT_U232_DATA_BITS_7; break;
- case CS8:
- priv->last_lcr |= MCT_U232_DATA_BITS_8; break;
- default:
- err("CSIZE was not CS5-CS8, using default of 8");
- priv->last_lcr |= MCT_U232_DATA_BITS_8;
- break;
- }
- /* set the number of stop bits */
- priv->last_lcr |= (cflag & CSTOPB) ?
- MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
- mct_u232_set_line_ctrl(serial, priv->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.
- */
- if( (iflag & IXOFF) != (old_iflag & IXOFF)
- || (iflag & IXON) != (old_iflag & IXON)
- || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) {
-
- /* Drop DTR/RTS if no flow control otherwise assert */
- if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) )
- priv->control_state |= TIOCM_DTR | TIOCM_RTS;
- else
- priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
- mct_u232_set_modem_ctrl(serial, priv->control_state);
- }
- } /* 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 = (struct mct_u232_private *)port->private;
- unsigned char lcr = priv->last_lcr;
- dbg (__FUNCTION__ "state=%d", break_state);
- if (break_state)
- lcr |= MCT_U232_SET_BREAK;
- mct_u232_set_line_ctrl(serial, lcr);
- } /* mct_u232_break_ctl */
- static int mct_u232_ioctl (struct usb_serial_port *port, struct file * file,
- unsigned int cmd, unsigned long arg)
- {
- struct usb_serial *serial = port->serial;
- struct mct_u232_private *priv = (struct mct_u232_private *)port->private;
- int mask;
-
- dbg (__FUNCTION__ "cmd=0x%x", cmd);
- /* Based on code from acm.c and others */
- switch (cmd) {
- case TIOCMGET:
- return put_user(priv->control_state, (unsigned long *) arg);
- break;
- case TIOCMSET: /* Turns on and off the lines as specified by the mask */
- case TIOCMBIS: /* turns on (Sets) the lines as specified by the mask */
- case TIOCMBIC: /* turns off (Clears) the lines as specified by the mask */
- if (get_user(mask, (unsigned long *) arg))
- return -EFAULT;
- if ((cmd == TIOCMSET) || (mask & TIOCM_RTS)) {
- /* RTS needs set */
- if( ((cmd == TIOCMSET) && (mask & TIOCM_RTS)) ||
- (cmd == TIOCMBIS) )
- priv->control_state |= TIOCM_RTS;
- else
- priv->control_state &= ~TIOCM_RTS;
- }
- if ((cmd == TIOCMSET) || (mask & TIOCM_DTR)) {
- /* DTR needs set */
- if( ((cmd == TIOCMSET) && (mask & TIOCM_DTR)) ||
- (cmd == TIOCMBIS) )
- priv->control_state |= TIOCM_DTR;
- else
- priv->control_state &= ~TIOCM_DTR;
- }
- mct_u232_set_modem_ctrl(serial, priv->control_state);
- break;
-
- 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(__FUNCTION__ ": arg not supported - 0x%04x",cmd);
- return(-ENOIOCTLCMD);
- break;
- }
- return 0;
- } /* mct_u232_ioctl */
- static int __init mct_u232_init (void)
- {
- usb_serial_register (&mct_u232_device);
- usb_serial_register (&mct_u232_sitecom_device);
- usb_serial_register (&mct_u232_du_h3sp_device);
- info(DRIVER_VERSION ":" DRIVER_DESC);
- return 0;
- }
- static void __exit mct_u232_exit (void)
- {
- usb_serial_deregister (&mct_u232_device);
- usb_serial_deregister (&mct_u232_sitecom_device);
- usb_serial_deregister (&mct_u232_du_h3sp_device);
- }
- module_init (mct_u232_init);
- module_exit(mct_u232_exit);
- MODULE_AUTHOR( DRIVER_AUTHOR );
- MODULE_DESCRIPTION( DRIVER_DESC );
- MODULE_LICENSE("GPL");
- #ifdef FIX_WRITE_RETURN_CODE_PROBLEM
- MODULE_PARM(write_blocking, "i");
- MODULE_PARM_DESC(write_blocking,
- "The write function will block to write out all data");
- #endif
- MODULE_PARM(debug, "i");
- MODULE_PARM_DESC(debug, "Debug enabled or not");