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 static 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 */ 44 static int empeg_startup(struct usb_serial *serial); 45 static void empeg_init_termios(struct tty_struct *tty); 46 47 static const struct usb_device_id id_table[] = { 48 { USB_DEVICE(EMPEG_VENDOR_ID, EMPEG_PRODUCT_ID) }, 49 { } /* Terminating entry */ 50 }; 51 52 MODULE_DEVICE_TABLE(usb, id_table); 53 54 static 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 68 static struct usb_serial_driver * const serial_drivers[] = { 69 &empeg_device, NULL 70 }; 71 72 static 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 88 static 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 } 131 132 module_usb_serial_driver(serial_drivers, id_table); 133 134 MODULE_AUTHOR(DRIVER_AUTHOR); 135 MODULE_DESCRIPTION(DRIVER_DESC); 136 MODULE_LICENSE("GPL"); 137 138 module_param(debug, bool, S_IRUGO | S_IWUSR); 139 MODULE_PARM_DESC(debug, "Debug enabled or not"); 140