linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * USB Empeg empeg-car player driver

 *

 *  Copyright (C) 2000, 2001

 *      Gary Brubaker (xavyer@ix.netcom.com)

 *

 *  Copyright (C) 1999 - 2001

 *      Greg Kroah-Hartman (greg@kroah.com)

 *

 * See Documentation/usb/usb-serial.txt for more information on using this

 * driver

 */

​

#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 <linux/usb.h>

#include <linux/usb/serial.h>

​

#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Gary Brubaker <xavyer@ix.netcom.com>"

#define DRIVER_DESC "USB Empeg Mark I/II Driver"

​

#define EMPEG_VENDOR_ID         0x084f

#define EMPEG_PRODUCT_ID        0x0001

​

/* function prototypes for an empeg-car player */

static int  empeg_startup(struct usb_serial *serial);

static void empeg_init_termios(struct tty_struct *tty);

​

static const struct usb_device_id id_table[] = {

    { USB_DEVICE(EMPEG_VENDOR_ID, EMPEG_PRODUCT_ID) },

    { }                 /* Terminating entry */

};

​

MODULE_DEVICE_TABLE(usb, id_table);

​

static struct usb_serial_driver empeg_device = {

    .driver = {

        .owner =    THIS_MODULE,

        .name =     "empeg",

    },

    .id_table =     id_table,

    .num_ports =        1,

    .bulk_out_size =    256,

    .throttle =     usb_serial_generic_throttle,

    .unthrottle =       usb_serial_generic_unthrottle,

    .attach =       empeg_startup,

    .init_termios =     empeg_init_termios,

};

​

static struct usb_serial_driver * const serial_drivers[] = {

    &empeg_device, NULL

};

​

static int empeg_startup(struct usb_serial *serial)

{

    int r;

​

    if (serial->dev->actconfig->desc.bConfigurationValue != 1) {

        dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",

            serial->dev->actconfig->desc.bConfigurationValue);

        return -ENODEV;

    }

​

    r = usb_reset_configuration(serial->dev);

​

    /* continue on with initialization */

    return r;

}

​

static void empeg_init_termios(struct tty_struct *tty)

{

    struct ktermios *termios = &tty->termios;

​

    /*

     * The empeg-car player wants these particular tty settings.

     * You could, for example, change the baud rate, however the

     * player only supports 115200 (currently), so there is really

     * no point in support for changes to the tty settings.

     * (at least for now)

     *

     * The default requirements for this device are:

     */

    termios->c_iflag

        &= ~(IGNBRK /* disable ignore break */