linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * MCT (Magic Control Technology Corp.) USB RS232 Converter Driver

 *

 *   Copyright (C) 2000 Wolfgang Grandegger (wolfgang@ces.ch)

 *

 * 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.

 */

​

#include <linux/kernel.h>

#include <linux/errno.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 <linux/uaccess.h>

#include <asm/unaligned.h>

#include <linux/usb.h>

#include <linux/usb/serial.h>

#include <linux/serial.h>

#include "mct_u232.h"

​

#define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>"

#define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver"

​

/*

 * Function prototypes

 */

static int  mct_u232_port_probe(struct usb_serial_port *port);

static int  mct_u232_port_remove(struct usb_serial_port *remove);

static int  mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port);

static void mct_u232_close(struct usb_serial_port *port);

static void mct_u232_dtr_rts(struct usb_serial_port *port, int on);

static void mct_u232_read_int_callback(struct urb *urb);

static void mct_u232_set_termios(struct tty_struct *tty,

            struct usb_serial_port *port, struct ktermios *old);

static void mct_u232_break_ctl(struct tty_struct *tty, int break_state);

static int  mct_u232_tiocmget(struct tty_struct *tty);

static int  mct_u232_tiocmset(struct tty_struct *tty,

            unsigned int set, unsigned int clear);

static void mct_u232_throttle(struct tty_struct *tty);

static void mct_u232_unthrottle(struct tty_struct *tty);

​

​

/*

 * All of the device info needed for the MCT USB-RS232 converter.

 */

static const struct usb_device_id id_table[] = {

    { 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);

​

static struct usb_serial_driver mct_u232_device = {

    .driver = {

        .owner =    THIS_MODULE,

        .name =     "mct_u232",

    },

    .description =       "MCT U232",

    .id_table =      id_table,

    .num_ports =         1,

    .open =          mct_u232_open,

    .close =         mct_u232_close,

    .dtr_rts =       mct_u232_dtr_rts,

    .throttle =      mct_u232_throttle,

    .unthrottle =        mct_u232_unthrottle,

    .read_int_callback = mct_u232_read_int_callback,

    .set_termios =       mct_u232_set_termios,

    .break_ctl =         mct_u232_break_ctl,

    .tiocmget =      mct_u232_tiocmget,

    .tiocmset =      mct_u232_tiocmset,

    .tiocmiwait =        usb_serial_generic_tiocmiwait,

    .port_probe =        mct_u232_port_probe,

    .port_remove =       mct_u232_port_remove,

    .get_icount =        usb_serial_generic_get_icount,

};

​