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 int 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_driver empeg_driver = {
  55        .name =         "empeg",
  56        .probe =        usb_serial_probe,
  57        .disconnect =   usb_serial_disconnect,
  58        .id_table =     id_table,
  59        .no_dynamic_id =        1,
  60};
  61
  62static struct usb_serial_driver empeg_device = {
  63        .driver = {
  64                .owner =        THIS_MODULE,
  65                .name =         "empeg",
  66        },
  67        .id_table =             id_table,
  68        .usb_driver =           &empeg_driver,
  69        .num_ports =            1,
  70        .bulk_out_size =        256,
  71        .throttle =             usb_serial_generic_throttle,
  72        .unthrottle =           usb_serial_generic_unthrottle,
  73        .attach =               empeg_startup,
  74        .init_termios =         empeg_init_termios,
  75};
  76
  77static int empeg_startup(struct usb_serial *serial)
  78{
  79        int r;
  80
  81        dbg("%s", __func__);
  82
  83        if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
  84                dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",
  85                        serial->dev->actconfig->desc.bConfigurationValue);
  86                return -ENODEV;
  87        }
  88        dbg("%s - reset config", __func__);
  89        r = usb_reset_configuration(serial->dev);
  90
  91        /* continue on with initialization */
  92        return r;
  93}
  94
  95static void empeg_init_termios(struct tty_struct *tty)
  96{
  97        struct ktermios *termios = tty->termios;
  98
  99        /*
 100         * The empeg-car player wants these particular tty settings.
 101         * You could, for example, change the baud rate, however the
 102         * player only supports 115200 (currently), so there is really
 103         * no point in support for changes to the tty settings.
 104         * (at least for now)
 105         *
 106         * The default requirements for this device are:
 107         */
 108        termios->c_iflag
 109                &= ~(IGNBRK     /* disable ignore break */
 110                | BRKINT        /* disable break causes interrupt */
 111                | PARMRK        /* disable mark parity errors */
 112                | ISTRIP        /* disable clear high bit of input characters */
 113                | INLCR         /* disable translate NL to CR */
 114                | IGNCR         /* disable ignore CR */
 115                | ICRNL         /* disable translate CR to NL */
 116                | IXON);        /* disable enable XON/XOFF flow control */
 117
 118        termios->c_oflag
 119                &= ~OPOST;      /* disable postprocess output characters */
 120
 121        termios->c_lflag
 122                &= ~(ECHO       /* disable echo input characters */
 123                | ECHONL        /* disable echo new line */
 124                | ICANON        /* disable erase, kill, werase, and rprnt special characters */
 125                | ISIG          /* disable interrupt, quit, and suspend special characters */
 126                | IEXTEN);      /* disable non-POSIX special characters */
 127
 128        termios->c_cflag
 129                &= ~(CSIZE      /* no size */
 130                | PARENB        /* disable parity bit */
 131                | CBAUD);       /* clear current baud rate */
 132
 133        termios->c_cflag
 134                |= CS8;         /* character size 8 bits */
 135
 136        tty_encode_baud_rate(tty, 115200, 115200);
 137}
 138
 139static int __init empeg_init(void)
 140{
 141        int retval;
 142
 143        retval = usb_serial_register(&empeg_device);
 144        if (retval)
 145                return retval;
 146        retval = usb_register(&empeg_driver);
 147        if (retval) {
 148                usb_serial_deregister(&empeg_device);
 149                return retval;
 150        }
 151        printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 152               DRIVER_DESC "\n");
 153
 154        return 0;
 155}
 156
 157static void __exit empeg_exit(void)
 158{
 159        usb_deregister(&empeg_driver);
 160        usb_serial_deregister(&empeg_device);
 161}
 162
 163
 164module_init(empeg_init);
 165module_exit(empeg_exit);
 166
 167MODULE_AUTHOR(DRIVER_AUTHOR);
 168MODULE_DESCRIPTION(DRIVER_DESC);
 169MODULE_LICENSE("GPL");
 170
 171module_param(debug, bool, S_IRUGO | S_IWUSR);
 172MODULE_PARM_DESC(debug, "Debug enabled or not");
 173