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/init.h>
  21#include <linux/slab.h>
  22#include <linux/tty.h>
  23#include <linux/tty_driver.h>
  24#include <linux/tty_flip.h>
  25#include <linux/module.h>
  26#include <linux/spinlock.h>
  27#include <linux/uaccess.h>
  28#include <linux/usb.h>
  29#include <linux/usb/serial.h>
  30
  31#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Gary Brubaker <xavyer@ix.netcom.com>"
  32#define DRIVER_DESC "USB Empeg Mark I/II Driver"
  33
  34#define EMPEG_VENDOR_ID                 0x084f
  35#define EMPEG_PRODUCT_ID                0x0001
  36
  37/* function prototypes for an empeg-car player */
  38static int  empeg_startup(struct usb_serial *serial);
  39static void empeg_init_termios(struct tty_struct *tty);
  40
  41static const struct usb_device_id id_table[] = {
  42        { USB_DEVICE(EMPEG_VENDOR_ID, EMPEG_PRODUCT_ID) },
  43        { }                                     /* Terminating entry */
  44};
  45
  46MODULE_DEVICE_TABLE(usb, id_table);
  47
  48static struct usb_serial_driver empeg_device = {
  49        .driver = {
  50                .owner =        THIS_MODULE,
  51                .name =         "empeg",
  52        },
  53        .id_table =             id_table,
  54        .num_ports =            1,
  55        .bulk_out_size =        256,
  56        .throttle =             usb_serial_generic_throttle,
  57        .unthrottle =           usb_serial_generic_unthrottle,
  58        .attach =               empeg_startup,
  59        .init_termios =         empeg_init_termios,
  60};
  61
  62static struct usb_serial_driver * const serial_drivers[] = {
  63        &empeg_device, NULL
  64};
  65
  66static int empeg_startup(struct usb_serial *serial)
  67{
  68        int r;
  69
  70        if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
  71                dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",
  72                        serial->dev->actconfig->desc.bConfigurationValue);
  73                return -ENODEV;
  74        }
  75
  76        r = usb_reset_configuration(serial->dev);
  77
  78        /* continue on with initialization */
  79        return r;
  80}
  81
  82static void empeg_init_termios(struct tty_struct *tty)
  83{
  84        struct ktermios *termios = &tty->termios;
  85
  86        /*
  87         * The empeg-car player wants these particular tty settings.
  88         * You could, for example, change the baud rate, however the
  89         * player only supports 115200 (currently), so there is really
  90         * no point in support for changes to the tty settings.
  91         * (at least for now)
  92         *
  93         * The default requirements for this device are:
  94         */
  95        termios->c_iflag
  96                &= ~(IGNBRK     /* disable ignore break */
  97                | BRKINT        /* disable break causes interrupt */
  98                | PARMRK        /* disable mark parity errors */
  99                | ISTRIP        /* disable clear high bit of input characters */
 100                | INLCR         /* disable translate NL to CR */
 101                | IGNCR         /* disable ignore CR */
 102                | ICRNL         /* disable translate CR to NL */
 103                | IXON);        /* disable enable XON/XOFF flow control */
 104
 105        termios->c_oflag
 106                &= ~OPOST;      /* disable postprocess output characters */
 107
 108        termios->c_lflag
 109                &= ~(ECHO       /* disable echo input characters */
 110                | ECHONL        /* disable echo new line */
 111                | ICANON        /* disable erase, kill, werase, and rprnt special characters */
 112                | ISIG          /* disable interrupt, quit, and suspend special characters */
 113                | IEXTEN);      /* disable non-POSIX special characters */
 114
 115        termios->c_cflag
 116                &= ~(CSIZE      /* no size */
 117                | PARENB        /* disable parity bit */
 118                | CBAUD);       /* clear current baud rate */
 119
 120        termios->c_cflag
 121                |= CS8;         /* character size 8 bits */
 122
 123        tty_encode_baud_rate(tty, 115200, 115200);
 124}
 125
 126module_usb_serial_driver(serial_drivers, id_table);
 127
 128MODULE_AUTHOR(DRIVER_AUTHOR);
 129MODULE_DESCRIPTION(DRIVER_DESC);
 130MODULE_LICENSE("GPL");
 131