summaryrefslogtreecommitdiffstats
path: root/drivers/usb/serial/qcserial.c
blob: e6d6b0c17fd9835158070a22359cd61fd3085492 (plain)
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
/*
 * Qualcomm Serial USB driver
 *
 *	Copyright (c) 2008 QUALCOMM Incorporated.
 *	Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de>
 *	Copyright (c) 2009 Novell Inc.
 *
 *	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/tty.h>
#include <linux/tty_flip.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>

#define DRIVER_AUTHOR "Qualcomm Inc"
#define DRIVER_DESC "Qualcomm USB Serial driver"

static int debug;

static struct usb_device_id id_table[] = {
	{USB_DEVICE(0x05c6, 0x9211)},	/* Acer Gobi QDL device */
	{USB_DEVICE(0x05c6, 0x9212)},	/* Acer Gobi Modem Device */
	{USB_DEVICE(0x03f0, 0x1f1d)},	/* HP un2400 Gobi Modem Device */
	{USB_DEVICE(0x03f0, 0x201d)},	/* HP un2400 Gobi QDL Device */
	{ }				/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, id_table);

static struct usb_driver qcdriver = {
	.name			= "qcserial",
	.probe			= usb_serial_probe,
	.disconnect		= usb_serial_disconnect,
	.id_table		= id_table,
	.suspend		= usb_serial_suspend,
	.resume			= usb_serial_resume,
	.supports_autosuspend	= true,
};

static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
{
	int retval = -ENODEV;
	__u8 nintf;
	__u8 ifnum;

	dbg("%s", __func__);

	nintf = serial->dev->actconfig->desc.bNumInterfaces;
	dbg("Num Interfaces = %d", nintf);
	ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
	dbg("This Interface = %d", ifnum);

	switch (nintf) {
	case 1:
		/* QDL mode */
		if (serial->interface->num_altsetting == 2) {
			struct usb_host_interface *intf;

			intf = &serial->interface->altsetting[1];
			if (intf->desc.bNumEndpoints == 2) {
				if (usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
				    usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
					dbg("QDL port found");
					retval = usb_set_interface(serial->dev, ifnum, 1);
					if (retval < 0) {
						dev_err(&serial->dev->dev,
							"Could not set interface, error %d\n",
							retval);
						retval = -ENODEV;
					}
					return retval;
				}
			}
		}
		break;

	case 4:
		/* Composite mode */
		if (ifnum == 2) {
			dbg("Modem port found");
			retval = usb_set_interface(serial->dev, ifnum, 0);
			if (retval < 0) {
				dev_err(&serial->dev->dev,
					"Could not set interface, error %d\n",
					retval);
				retval = -ENODEV;
			}
			return retval;
		}
		break;

	default:
		dev_err(&serial->dev->dev,
			"unknown number of interfaces: %d\n", nintf);
		return -ENODEV;
	}

	return retval;
}

static struct usb_serial_driver qcdevice = {
	.driver = {
		.owner     = THIS_MODULE,
		.name      = "qcserial",
	},
	.description         = "Qualcomm USB modem",
	.id_table            = id_table,
	.usb_driver          = &qcdriver,
	.num_ports           = 1,
	.probe               = qcprobe,
};

static int __init qcinit(void)
{
	int retval;

	retval = usb_serial_register(&qcdevice);
	if (retval)
		return retval;

	retval = usb_register(&qcdriver);
	if (retval) {
		usb_serial_deregister(&qcdevice);
		return retval;
	}

	return 0;
}

static void __exit qcexit(void)
{
	usb_deregister(&qcdriver);
	usb_serial_deregister(&qcdevice);
}

module_init(qcinit);
module_exit(qcexit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL v2");

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");