1 /*
2 * Navman Serial USB driver
3 *
4 * Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/tty.h>
14 #include <linux/tty_flip.h>
15 #include <linux/module.h>
16 #include <linux/usb.h>
17 #include <linux/usb/serial.h>
18
19 static int debug;
20
21 static struct usb_device_id id_table [] = {
22 { USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */
23 { },
24 };
25 MODULE_DEVICE_TABLE(usb, id_table);
26
27 static struct usb_driver navman_driver = {
28 .name = "navman",
29 .probe = usb_serial_probe,
30 .disconnect = usb_serial_disconnect,
31 .id_table = id_table,
32 .no_dynamic_id = 1,
33 };
34
35 static void navman_read_int_callback(struct urb *urb)
36 {
37 struct usb_serial_port *port = urb->context;
38 unsigned char *data = urb->transfer_buffer;
39 struct tty_struct *tty;
40 int status = urb->status;
41 int result;
42
43 switch (status) {
44 case 0:
45 /* success */
46 break;
47 case -ECONNRESET:
48 case -ENOENT:
49 case -ESHUTDOWN:
50 /* this urb is terminated, clean up */
51 dbg("%s - urb shutting down with status: %d",
52 __FUNCTION__, status);
53 return;
54 default:
55 dbg("%s - nonzero urb status received: %d",
56 __FUNCTION__, status);
57 goto exit;
58 }
59
60 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
61 urb->actual_length, data);
62
63 tty = port->tty;
64 if (tty && urb->actual_length) {
65 tty_buffer_request_room(tty, urb->actual_length);
66 tty_insert_flip_string(tty, data, urb->actual_length);
67 tty_flip_buffer_push(tty);
68 }
69
70 exit:
71 result = usb_submit_urb(urb, GFP_ATOMIC);
72 if (result)
73 dev_err(&urb->dev->dev,
74 "%s - Error %d submitting interrupt urb\n",
75 __FUNCTION__, result);
76 }
77
78 static int navman_open(struct usb_serial_port *port, struct file *filp)
79 {
80 int result = 0;
81
82 dbg("%s - port %d", __FUNCTION__, port->number);
83
84 if (port->interrupt_in_urb) {
85 dbg("%s - adding interrupt input for treo", __FUNCTION__);
86 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
87 if (result)
88 dev_err(&port->dev,
89 "%s - failed submitting interrupt urb, error %d\n",
90 __FUNCTION__, result);
91 }
92 return result;
93 }
94
95 static void navman_close(struct usb_serial_port *port, struct file *filp)
96 {
97 dbg("%s - port %d", __FUNCTION__, port->number);
98
99 usb_kill_urb(port->interrupt_in_urb);
100 }
101
102 static int navman_write(struct usb_serial_port *port,
103 const unsigned char *buf, int count)
104 {
105 dbg("%s - port %d", __FUNCTION__, port->number);
106
107 /*
108 * This device can't write any data, only read from the device
109 * so we just silently eat all data sent to us and say it was
110 * successfully sent.
111 * Evil, I know, but do you have a better idea?
112 */
113
114 return count;
115 }
116
117 static struct usb_serial_driver navman_device = {
118 .driver = {
119 .owner = THIS_MODULE,
120 .name = "navman",
121 },
122 .id_table = id_table,
123 .usb_driver = &navman_driver,
124 .num_interrupt_in = NUM_DONT_CARE,
125 .num_bulk_in = NUM_DONT_CARE,
126 .num_bulk_out = NUM_DONT_CARE,
127 .num_ports = 1,
128 .open = navman_open,
129 .close = navman_close,
130 .write = navman_write,
131 .read_int_callback = navman_read_int_callback,
132 };
133
134 static int __init navman_init(void)
135 {
136 int retval;
137
138 retval = usb_serial_register(&navman_device);
139 if (retval)
140 return retval;
141 retval = usb_register(&navman_driver);
142 if (retval)
143 usb_serial_deregister(&navman_device);
144 return retval;
145 }
146
147 static void __exit navman_exit(void)
148 {
149 usb_deregister(&navman_driver);
150 usb_serial_deregister(&navman_device);
151 }
152
153 module_init(navman_init);
154 module_exit(navman_exit);
155 MODULE_LICENSE("GPL");
156
157 module_param(debug, bool, S_IRUGO | S_IWUSR);
158 MODULE_PARM_DESC(debug, "Debug enabled or not");
159
|
This page was automatically generated by the
LXR engine.
|