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