Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * AnyData CDMA Serial USB driver
3 *
4 * Copyright (C) 2005 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 version
8 * 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/module.h>
15#include <linux/usb.h>
16#include "usb-serial.h"
17
18static struct usb_device_id id_table [] = {
19 { USB_DEVICE(0x16d5, 0x6501) }, /* AirData CDMA device */
20 { },
21};
22MODULE_DEVICE_TABLE(usb, id_table);
23
24/* if overridden by the user, then use their value for the size of the
25 * read and write urbs */
26static int buffer_size;
27static int debug;
28
29static struct usb_driver anydata_driver = {
30 .name = "anydata",
31 .probe = usb_serial_probe,
32 .disconnect = usb_serial_disconnect,
33 .id_table = id_table,
34 .no_dynamic_id = 1,
35};
36
37static int anydata_open(struct usb_serial_port *port, struct file *filp)
38{
39 char *buffer;
40 int result = 0;
41
42 dbg("%s - port %d", __FUNCTION__, port->number);
43
44 if (buffer_size) {
45 /* override the default buffer sizes */
46 buffer = kmalloc(buffer_size, GFP_KERNEL);
47 if (!buffer) {
48 dev_err(&port->dev, "%s - out of memory.\n",
49 __FUNCTION__);
50 return -ENOMEM;
51 }
52 kfree (port->read_urb->transfer_buffer);
53 port->read_urb->transfer_buffer = buffer;
54 port->read_urb->transfer_buffer_length = buffer_size;
55
56 buffer = kmalloc(buffer_size, GFP_KERNEL);
57 if (!buffer) {
58 dev_err(&port->dev, "%s - out of memory.\n",
59 __FUNCTION__);
60 return -ENOMEM;
61 }
62 kfree (port->write_urb->transfer_buffer);
63 port->write_urb->transfer_buffer = buffer;
64 port->write_urb->transfer_buffer_length = buffer_size;
65 port->bulk_out_size = buffer_size;
66 }
67
68 /* Start reading from the device */
69 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
70 usb_rcvbulkpipe(port->serial->dev,
71 port->bulk_in_endpointAddress),
72 port->read_urb->transfer_buffer,
73 port->read_urb->transfer_buffer_length,
74 usb_serial_generic_write_bulk_callback, port);
75 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
76 if (result)
77 dev_err(&port->dev,
78 "%s - failed submitting read urb, error %d\n",
79 __FUNCTION__, result);
80
81 return result;
82}
83
84static struct usb_serial_driver anydata_device = {
85 .driver = {
86 .owner = THIS_MODULE,
87 .name = "anydata",
88 },
89 .id_table = id_table,
90 .num_interrupt_in = NUM_DONT_CARE,
91 .num_bulk_in = NUM_DONT_CARE,
92 .num_bulk_out = NUM_DONT_CARE,
93 .num_ports = 1,
94 .open = anydata_open,
95};
96
97static int __init anydata_init(void)
98{
99 int retval;
100
101 retval = usb_serial_register(&anydata_device);
102 if (retval)
103 return retval;
104 retval = usb_register(&anydata_driver);
105 if (retval)
106 usb_serial_deregister(&anydata_device);
107 return retval;
108}
109
110static void __exit anydata_exit(void)
111{
112 usb_deregister(&anydata_driver);
113 usb_serial_deregister(&anydata_device);
114}
115
116module_init(anydata_init);
117module_exit(anydata_exit);
118MODULE_LICENSE("GPL");
119
120module_param(debug, bool, S_IRUGO | S_IWUSR);
121MODULE_PARM_DESC(debug, "Debug enabled or not");
122module_param(buffer_size, int, 0);
123MODULE_PARM_DESC(buffer_size, "Size of the transfer buffers");