1/*
2 * USB Empeg empeg-car player driver
3 *
4 *	Copyright (C) 2000, 2001
5 *	    Gary Brubaker (xavyer@ix.netcom.com)
6 *
7 *	Copyright (C) 1999 - 2001
8 *	    Greg Kroah-Hartman (greg@kroah.com)
9 *
10 *	This program is free software; you can redistribute it and/or modify
11 *	it under the terms of the GNU General Public License, as published by
12 *	the Free Software Foundation, version 2.
13 *
14 * See Documentation/usb/usb-serial.txt for more information on using this
15 * driver
16 */
17
18#include <linux/kernel.h>
19#include <linux/errno.h>
20#include <linux/slab.h>
21#include <linux/tty.h>
22#include <linux/tty_driver.h>
23#include <linux/tty_flip.h>
24#include <linux/module.h>
25#include <linux/spinlock.h>
26#include <linux/uaccess.h>
27#include <linux/usb.h>
28#include <linux/usb/serial.h>
29
30#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Gary Brubaker <xavyer@ix.netcom.com>"
31#define DRIVER_DESC "USB Empeg Mark I/II Driver"
32
33#define EMPEG_VENDOR_ID			0x084f
34#define EMPEG_PRODUCT_ID		0x0001
35
36/* function prototypes for an empeg-car player */
37static int  empeg_startup(struct usb_serial *serial);
38static void empeg_init_termios(struct tty_struct *tty);
39
40static const struct usb_device_id id_table[] = {
41	{ USB_DEVICE(EMPEG_VENDOR_ID, EMPEG_PRODUCT_ID) },
42	{ }					/* Terminating entry */
43};
44
45MODULE_DEVICE_TABLE(usb, id_table);
46
47static struct usb_serial_driver empeg_device = {
48	.driver = {
49		.owner =	THIS_MODULE,
50		.name =		"empeg",
51	},
52	.id_table =		id_table,
53	.num_ports =		1,
54	.bulk_out_size =	256,
55	.throttle =		usb_serial_generic_throttle,
56	.unthrottle =		usb_serial_generic_unthrottle,
57	.attach =		empeg_startup,
58	.init_termios =		empeg_init_termios,
59};
60
61static struct usb_serial_driver * const serial_drivers[] = {
62	&empeg_device, NULL
63};
64
65static int empeg_startup(struct usb_serial *serial)
66{
67	int r;
68
69	if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
70		dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",
71			serial->dev->actconfig->desc.bConfigurationValue);
72		return -ENODEV;
73	}
74
75	r = usb_reset_configuration(serial->dev);
76
77	/* continue on with initialization */
78	return r;
79}
80
81static void empeg_init_termios(struct tty_struct *tty)
82{
83	struct ktermios *termios = &tty->termios;
84
85	/*
86	 * The empeg-car player wants these particular tty settings.
87	 * You could, for example, change the baud rate, however the
88	 * player only supports 115200 (currently), so there is really
89	 * no point in support for changes to the tty settings.
90	 * (at least for now)
91	 *
92	 * The default requirements for this device are:
93	 */
94	termios->c_iflag
95		&= ~(IGNBRK	/* disable ignore break */
96		| BRKINT	/* disable break causes interrupt */
97		| PARMRK	/* disable mark parity errors */
98		| ISTRIP	/* disable clear high bit of input characters */
99		| INLCR		/* disable translate NL to CR */
100		| IGNCR		/* disable ignore CR */
101		| ICRNL		/* disable translate CR to NL */
102		| IXON);	/* disable enable XON/XOFF flow control */
103
104	termios->c_oflag
105		&= ~OPOST;	/* disable postprocess output characters */
106
107	termios->c_lflag
108		&= ~(ECHO	/* disable echo input characters */
109		| ECHONL	/* disable echo new line */
110		| ICANON	/* disable erase, kill, werase, and rprnt special characters */
111		| ISIG		/* disable interrupt, quit, and suspend special characters */
112		| IEXTEN);	/* disable non-POSIX special characters */
113
114	termios->c_cflag
115		&= ~(CSIZE	/* no size */
116		| PARENB	/* disable parity bit */
117		| CBAUD);	/* clear current baud rate */
118
119	termios->c_cflag
120		|= CS8;		/* character size 8 bits */
121
122	tty_encode_baud_rate(tty, 115200, 115200);
123}
124
125module_usb_serial_driver(serial_drivers, id_table);
126
127MODULE_AUTHOR(DRIVER_AUTHOR);
128MODULE_DESCRIPTION(DRIVER_DESC);
129MODULE_LICENSE("GPL");
130