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 /* 32 * Version Information 33 */ 34 #define DRIVER_VERSION "v1.3" 35 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Gary Brubaker <xavyer@ix.netcom.com>" 36 #define DRIVER_DESC "USB Empeg Mark I/II Driver" 37 38 #define EMPEG_VENDOR_ID 0x084f 39 #define EMPEG_PRODUCT_ID 0x0001 40 41 /* function prototypes for an empeg-car player */ 42 static int empeg_startup(struct usb_serial *serial); 43 static void empeg_init_termios(struct tty_struct *tty); 44 45 static const struct usb_device_id id_table[] = { 46 { USB_DEVICE(EMPEG_VENDOR_ID, EMPEG_PRODUCT_ID) }, 47 { } /* Terminating entry */ 48 }; 49 50 MODULE_DEVICE_TABLE(usb, id_table); 51 52 static struct usb_serial_driver empeg_device = { 53 .driver = { 54 .owner = THIS_MODULE, 55 .name = "empeg", 56 }, 57 .id_table = id_table, 58 .num_ports = 1, 59 .bulk_out_size = 256, 60 .throttle = usb_serial_generic_throttle, 61 .unthrottle = usb_serial_generic_unthrottle, 62 .attach = empeg_startup, 63 .init_termios = empeg_init_termios, 64 }; 65 66 static struct usb_serial_driver * const serial_drivers[] = { 67 &empeg_device, NULL 68 }; 69 70 static int empeg_startup(struct usb_serial *serial) 71 { 72 int r; 73 74 if (serial->dev->actconfig->desc.bConfigurationValue != 1) { 75 dev_err(&serial->dev->dev, "active config #%d != 1 ??\n", 76 serial->dev->actconfig->desc.bConfigurationValue); 77 return -ENODEV; 78 } 79 80 r = usb_reset_configuration(serial->dev); 81 82 /* continue on with initialization */ 83 return r; 84 } 85 86 static void empeg_init_termios(struct tty_struct *tty) 87 { 88 struct ktermios *termios = &tty->termios; 89 90 /* 91 * The empeg-car player wants these particular tty settings. 92 * You could, for example, change the baud rate, however the 93 * player only supports 115200 (currently), so there is really 94 * no point in support for changes to the tty settings. 95 * (at least for now) 96 * 97 * The default requirements for this device are: 98 */ 99 termios->c_iflag 100 &= ~(IGNBRK /* disable ignore break */ 101 | BRKINT /* disable break causes interrupt */ 102 | PARMRK /* disable mark parity errors */ 103 | ISTRIP /* disable clear high bit of input characters */ 104 | INLCR /* disable translate NL to CR */ 105 | IGNCR /* disable ignore CR */ 106 | ICRNL /* disable translate CR to NL */ 107 | IXON); /* disable enable XON/XOFF flow control */ 108 109 termios->c_oflag 110 &= ~OPOST; /* disable postprocess output characters */ 111 112 termios->c_lflag 113 &= ~(ECHO /* disable echo input characters */ 114 | ECHONL /* disable echo new line */ 115 | ICANON /* disable erase, kill, werase, and rprnt special characters */ 116 | ISIG /* disable interrupt, quit, and suspend special characters */ 117 | IEXTEN); /* disable non-POSIX special characters */ 118 119 termios->c_cflag 120 &= ~(CSIZE /* no size */ 121 | PARENB /* disable parity bit */ 122 | CBAUD); /* clear current baud rate */ 123 124 termios->c_cflag 125 |= CS8; /* character size 8 bits */ 126 127 tty_encode_baud_rate(tty, 115200, 115200); 128 } 129 130 module_usb_serial_driver(serial_drivers, id_table); 131 132 MODULE_AUTHOR(DRIVER_AUTHOR); 133 MODULE_DESCRIPTION(DRIVER_DESC); 134 MODULE_LICENSE("GPL"); 135