2 * USB Debug cable driver
4 * Copyright (C) 2006 Greg Kroah-Hartman <greg@kroah.com>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.
11 #include <linux/gfp.h>
12 #include <linux/kernel.h>
13 #include <linux/tty.h>
14 #include <linux/module.h>
15 #include <linux/usb.h>
16 #include <linux/usb/serial.h>
18 #define USB_DEBUG_MAX_PACKET_SIZE 8
19 #define USB_DEBUG_BRK_SIZE 8
20 static const char USB_DEBUG_BRK[USB_DEBUG_BRK_SIZE] = {
31 static const struct usb_device_id id_table[] = {
32 { USB_DEVICE(0x0525, 0x127a) },
36 static const struct usb_device_id dbc_id_table[] = {
37 { USB_DEVICE(0x1d6b, 0x0004) },
41 static const struct usb_device_id id_table_combined[] = {
42 { USB_DEVICE(0x0525, 0x127a) },
43 { USB_DEVICE(0x1d6b, 0x0004) },
46 MODULE_DEVICE_TABLE(usb, id_table_combined);
48 /* This HW really does not support a serial break, so one will be
49 * emulated when ever the break state is set to true.
51 static void usb_debug_break_ctl(struct tty_struct *tty, int break_state)
53 struct usb_serial_port *port = tty->driver_data;
56 usb_serial_generic_write(tty, port, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE);
59 static void usb_debug_process_read_urb(struct urb *urb)
61 struct usb_serial_port *port = urb->context;
63 if (urb->actual_length == USB_DEBUG_BRK_SIZE &&
64 memcmp(urb->transfer_buffer, USB_DEBUG_BRK,
65 USB_DEBUG_BRK_SIZE) == 0) {
66 usb_serial_handle_break(port);
70 usb_serial_generic_process_read_urb(urb);
73 static struct usb_serial_driver debug_device = {
80 .bulk_out_size = USB_DEBUG_MAX_PACKET_SIZE,
81 .break_ctl = usb_debug_break_ctl,
82 .process_read_urb = usb_debug_process_read_urb,
85 static struct usb_serial_driver dbc_device = {
90 .id_table = dbc_id_table,
92 .break_ctl = usb_debug_break_ctl,
93 .process_read_urb = usb_debug_process_read_urb,
96 static struct usb_serial_driver * const serial_drivers[] = {
97 &debug_device, &dbc_device, NULL
100 module_usb_serial_driver(serial_drivers, id_table_combined);
101 MODULE_LICENSE("GPL");