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