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, 0x0011) },
41 static const struct usb_device_id id_table_combined
[] = {
42 { USB_DEVICE(0x0525, 0x127a) },
43 { USB_DEVICE(0x1d6b, 0x0011) },
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");