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 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 */ 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_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 62 static 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 77 static 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 95 static 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 } 138 139 static 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 } 156 157 static void __exit empeg_exit(void) 158 { 159 usb_deregister(&empeg_driver); 160 usb_serial_deregister(&empeg_device); 161 } 162 163 164 module_init(empeg_init); 165 module_exit(empeg_exit); 166 167 MODULE_AUTHOR(DRIVER_AUTHOR); 168 MODULE_DESCRIPTION(DRIVER_DESC); 169 MODULE_LICENSE("GPL"); 170 171 module_param(debug, bool, S_IRUGO | S_IWUSR); 172 MODULE_PARM_DESC(debug, "Debug enabled or not"); 173