mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-16 05:50:19 +00:00
a509a7e478
And indeed none of them use it. Clean this up as it will make moving to a standard open method rather easier. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
|
|
* USB Debug cable driver
|
|
*
|
|
* Copyright (C) 2006 Greg Kroah-Hartman <greg@kroah.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 as published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/module.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/serial.h>
|
|
|
|
#define URB_DEBUG_MAX_IN_FLIGHT_URBS 4000
|
|
#define USB_DEBUG_MAX_PACKET_SIZE 8
|
|
#define USB_DEBUG_BRK_SIZE 8
|
|
static char USB_DEBUG_BRK[USB_DEBUG_BRK_SIZE] = {
|
|
0x00,
|
|
0xff,
|
|
0x01,
|
|
0xfe,
|
|
0x00,
|
|
0xfe,
|
|
0x01,
|
|
0xff,
|
|
};
|
|
|
|
static struct usb_device_id id_table [] = {
|
|
{ USB_DEVICE(0x0525, 0x127a) },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, id_table);
|
|
|
|
static struct usb_driver debug_driver = {
|
|
.name = "debug",
|
|
.probe = usb_serial_probe,
|
|
.disconnect = usb_serial_disconnect,
|
|
.id_table = id_table,
|
|
.no_dynamic_id = 1,
|
|
};
|
|
|
|
static int usb_debug_open(struct tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
port->bulk_out_size = USB_DEBUG_MAX_PACKET_SIZE;
|
|
return usb_serial_generic_open(tty, port);
|
|
}
|
|
|
|
/* This HW really does not support a serial break, so one will be
|
|
* emulated when ever the break state is set to true.
|
|
*/
|
|
static void usb_debug_break_ctl(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
if (!break_state)
|
|
return;
|
|
usb_serial_generic_write(tty, port, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE);
|
|
}
|
|
|
|
static void usb_debug_read_bulk_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
|
|
if (urb->actual_length == USB_DEBUG_BRK_SIZE &&
|
|
memcmp(urb->transfer_buffer, USB_DEBUG_BRK,
|
|
USB_DEBUG_BRK_SIZE) == 0) {
|
|
usb_serial_handle_break(port);
|
|
usb_serial_generic_resubmit_read_urb(port, GFP_ATOMIC);
|
|
return;
|
|
}
|
|
|
|
usb_serial_generic_read_bulk_callback(urb);
|
|
}
|
|
|
|
static struct usb_serial_driver debug_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "debug",
|
|
},
|
|
.id_table = id_table,
|
|
.num_ports = 1,
|
|
.open = usb_debug_open,
|
|
.max_in_flight_urbs = URB_DEBUG_MAX_IN_FLIGHT_URBS,
|
|
.break_ctl = usb_debug_break_ctl,
|
|
.read_bulk_callback = usb_debug_read_bulk_callback,
|
|
};
|
|
|
|
static int __init debug_init(void)
|
|
{
|
|
int retval;
|
|
|
|
retval = usb_serial_register(&debug_device);
|
|
if (retval)
|
|
return retval;
|
|
retval = usb_register(&debug_driver);
|
|
if (retval)
|
|
usb_serial_deregister(&debug_device);
|
|
return retval;
|
|
}
|
|
|
|
static void __exit debug_exit(void)
|
|
{
|
|
usb_deregister(&debug_driver);
|
|
usb_serial_deregister(&debug_device);
|
|
}
|
|
|
|
module_init(debug_init);
|
|
module_exit(debug_exit);
|
|
MODULE_LICENSE("GPL");
|