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// 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.rst 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 */
| BRKINT /* disable break causes interrupt */
| PARMRK /* disable mark parity errors */
| ISTRIP /* disable clear high bit of input characters */
| INLCR /* disable translate NL to CR */
| IGNCR /* disable ignore CR */
| ICRNL /* disable translate CR to NL */
| IXON); /* disable enable XON/XOFF flow control */
termios->c_oflag
&= ~OPOST; /* disable postprocess output characters */
termios->c_lflag
&= ~(ECHO /* disable echo input characters */
| ECHONL /* disable echo new line */
| ICANON /* disable erase, kill, werase, and rprnt special characters */
| ISIG /* disable interrupt, quit, and suspend special characters */
| IEXTEN); /* disable non-POSIX special characters */
termios->c_cflag
&= ~(CSIZE /* no size */
| PARENB /* disable parity bit */
| CBAUD); /* clear current baud rate */
termios->c_cflag
|= CS8; /* character size 8 bits */
tty_encode_baud_rate(tty, 115200, 115200);
}
module_usb_serial_driver(serial_drivers, id_table);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL v2");
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