1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* Navman Serial USB driver
*
* Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de>
*
* 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/tty_flip.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
static int debug;
static struct usb_device_id id_table [] = {
{ USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */
{ },
};
MODULE_DEVICE_TABLE(usb, id_table);
static struct usb_driver navman_driver = {
.name = "navman",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table,
.no_dynamic_id = 1,
};
static void navman_read_int_callback(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
unsigned char *data = urb->transfer_buffer;
struct tty_struct *tty;
int result;
switch (urb->status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d",
__FUNCTION__, urb->status);
return;
default:
dbg("%s - nonzero urb status received: %d",
__FUNCTION__, urb->status);
goto exit;
}
usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
urb->actual_length, data);
tty = port->tty;
if (tty && urb->actual_length) {
tty_buffer_request_room(tty, urb->actual_length);
tty_insert_flip_string(tty, data, urb->actual_length);
tty_flip_buffer_push(tty);
}
exit:
result = usb_submit_urb(urb, GFP_ATOMIC);
if (result)
dev_err(&urb->dev->dev,
"%s - Error %d submitting interrupt urb\n",
__FUNCTION__, result);
}
static int navman_open(struct usb_serial_port *port, struct file *filp)
{
int result = 0;
dbg("%s - port %d", __FUNCTION__, port->number);
if (port->interrupt_in_urb) {
dbg("%s - adding interrupt input for treo", __FUNCTION__);
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if (result)
dev_err(&port->dev,
"%s - failed submitting interrupt urb, error %d\n",
__FUNCTION__, result);
}
return result;
}
static void navman_close(struct usb_serial_port *port, struct file *filp)
{
dbg("%s - port %d", __FUNCTION__, port->number);
usb_kill_urb(port->interrupt_in_urb);
}
static int navman_write(struct usb_serial_port *port,
const unsigned char *buf, int count)
{
dbg("%s - port %d", __FUNCTION__, port->number);
/*
* This device can't write any data, only read from the device
* so we just silently eat all data sent to us and say it was
* successfully sent.
* Evil, I know, but do you have a better idea?
*/
return count;
}
static struct usb_serial_driver navman_device = {
.driver = {
.owner = THIS_MODULE,
.name = "navman",
},
.id_table = id_table,
.usb_driver = &navman_driver,
.num_interrupt_in = NUM_DONT_CARE,
.num_bulk_in = NUM_DONT_CARE,
.num_bulk_out = NUM_DONT_CARE,
.num_ports = 1,
.open = navman_open,
.close = navman_close,
.write = navman_write,
.read_int_callback = navman_read_int_callback,
};
static int __init navman_init(void)
{
int retval;
retval = usb_serial_register(&navman_device);
if (retval)
return retval;
retval = usb_register(&navman_driver);
if (retval)
usb_serial_deregister(&navman_device);
return retval;
}
static void __exit navman_exit(void)
{
usb_deregister(&navman_driver);
usb_serial_deregister(&navman_device);
}
module_init(navman_init);
module_exit(navman_exit);
MODULE_LICENSE("GPL");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
|
