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
  31static bool debug;
  32
  33/*
  34 * Version Information
  35 */
  36#define DRIVER_VERSION "v1.3"
  37#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Gary Brubaker <xavyer@ix.netcom.com>"
  38#define DRIVER_DESC "USB Empeg Mark I/II Driver"
  39
  40#define EMPEG_VENDOR_ID                 0x084f
  41#define EMPEG_PRODUCT_ID                0x0001
  42
  43/* function prototypes for an empeg-car player */
  44static int  empeg_startup(struct usb_serial *serial);
  45static void empeg_init_termios(struct tty_struct *tty);
  46
  47static const struct usb_device_id id_table[] = {
  48        { USB_DEVICE(EMPEG_VENDOR_ID, EMPEG_PRODUCT_ID) },
  49        { }                                     /* Terminating entry */
  50};
  51
  52MODULE_DEVICE_TABLE(usb, id_table);
  53
  54static struct usb_serial_driver empeg_device = {
  55        .driver = {
  56                .owner =        THIS_MODULE,
  57                .name =         "empeg",
  58        },
  59        .id_table =             id_table,
  60        .num_ports =            1,
  61        .bulk_out_size =        256,
  62        .throttle =             usb_serial_generic_throttle,
  63        .unthrottle =           usb_serial_generic_unthrottle,
  64        .attach =               empeg_startup,
  65        .init_termios =         empeg_init_termios,
  66};
  67
  68static struct usb_serial_driver * const serial_drivers[] = {
  69        &empeg_device, NULL
  70};
  71
  72static int empeg_startup(struct usb_serial *serial)
  73{
  74        int r;
  75
  76        if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
  77                dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",
  78                        serial->dev->actconfig->desc.bConfigurationValue);
  79                return -ENODEV;
  80        }
  81
  82        r = usb_reset_configuration(serial->dev);
  83
  84        /* continue on with initialization */
  85        return r;
  86}
  87
  88static void empeg_init_termios(struct tty_struct *tty)
  89{
  90        struct ktermios *termios = tty->termios;
  91
  92        /*
  93         * The empeg-car player wants these particular tty settings.
  94         * You could, for example, change the baud rate, however the
  95         * player only supports 115200 (currently), so there is really
  96         * no point in support for changes to the tty settings.
  97         * (at least for now)
  98         *
  99         * The default requirements for this device are:
 100         */
 101        termios->c_iflag
 102                &= ~(IGNBRK     /* disable ignore break */
 103                | BRKINT        /* disable break causes interrupt */
 104                | PARMRK        /* disable mark parity errors */
 105                | ISTRIP        /* disable clear high bit of input characters */
 106                | INLCR         /* disable translate NL to CR */
 107                | IGNCR         /* disable ignore CR */
 108                | ICRNL         /* disable translate CR to NL */
 109                | IXON);        /* disable enable XON/XOFF flow control */
 110
 111        termios->c_oflag
 112                &= ~OPOST;      /* disable postprocess output characters */
 113
 114        termios->c_lflag
 115                &= ~(ECHO       /* disable echo input characters */
 116                | ECHONL        /* disable echo new line */
 117                | ICANON        /* disable erase, kill, werase, and rprnt special characters */
 118                | ISIG          /* disable interrupt, quit, and suspend special characters */
 119                | IEXTEN);      /* disable non-POSIX special characters */
 120
 121        termios->c_cflag
 122                &= ~(CSIZE      /* no size */
 123                | PARENB        /* disable parity bit */
 124                | CBAUD);       /* clear current baud rate */
 125
 126        termios->c_cflag
 127                |= CS8;         /* character size 8 bits */
 128
 129        tty_encode_baud_rate(tty, 115200, 115200);
 130}
 131
 132module_usb_serial_driver(serial_drivers, id_table);
 133
 134MODULE_AUTHOR(DRIVER_AUTHOR);
 135MODULE_DESCRIPTION(DRIVER_DESC);
 136MODULE_LICENSE("GPL");
 137
 138module_param(debug, bool, S_IRUGO | S_IWUSR);
 139MODULE_PARM_DESC(debug, "Debug enabled or not");
 140