LXR linux/drivers/usb/serial/empeg.c

   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