// 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/module.h>#include <linux/spinlock.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 = {		.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");