aboutsummaryrefslogtreecommitdiff
path: root/drivers/bluetooth/ath3k.c
blob: 949ed09c6361130c30c3ebda1bc4db02b00fa4c2 (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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
/*
 * Copyright (c) 2008-2009 Atheros Communications Inc.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */


#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/usb.h>
#include <net/bluetooth/bluetooth.h>

#define VERSION "1.0"


static struct usb_device_id ath3k_table[] = {
	/* Atheros AR3011 */
	{ USB_DEVICE(0x0CF3, 0x3000) },

	/* Atheros AR3011 with sflash firmware*/
	{ USB_DEVICE(0x0CF3, 0x3002) },

	{ }	/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, ath3k_table);

#define USB_REQ_DFU_DNLOAD	1
#define BULK_SIZE		4096

struct ath3k_data {
	struct usb_device *udev;
	u8 *fw_data;
	u32 fw_size;
	u32 fw_sent;
};

static int ath3k_load_firmware(struct ath3k_data *data,
				unsigned char *firmware,
				int count)
{
	u8 *send_buf;
	int err, pipe, len, size, sent = 0;

	BT_DBG("ath3k %p udev %p", data, data->udev);

	pipe = usb_sndctrlpipe(data->udev, 0);

	if ((usb_control_msg(data->udev, pipe,
				USB_REQ_DFU_DNLOAD,
				USB_TYPE_VENDOR, 0, 0,
				firmware, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
		BT_ERR("Can't change to loading configuration err");
		return -EBUSY;
	}
	sent += 20;
	count -= 20;

	send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
	if (!send_buf) {
		BT_ERR("Can't allocate memory chunk for firmware");
		return -ENOMEM;
	}

	while (count) {
		size = min_t(uint, count, BULK_SIZE);
		pipe = usb_sndbulkpipe(data->udev, 0x02);
		memcpy(send_buf, firmware + sent, size);

		err = usb_bulk_msg(data->udev, pipe, send_buf, size,
					&len, 3000);

		if (err || (len != size)) {
			BT_ERR("Error in firmware loading err = %d,"
				"len = %d, size = %d", err, len, size);
			goto error;
		}

		sent  += size;
		count -= size;
	}

	kfree(send_buf);
	return 0;

error:
	kfree(send_buf);
	return err;
}

static int ath3k_probe(struct usb_interface *intf,
			const struct usb_device_id *id)
{
	const struct firmware *firmware;
	struct usb_device *udev = interface_to_usbdev(intf);
	struct ath3k_data *data;
	int size;

	BT_DBG("intf %p id %p", intf, id);

	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
		return -ENODEV;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->udev = udev;

	if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
		kfree(data);
		return -EIO;
	}

	size = max_t(uint, firmware->size, 4096);
	data->fw_data = kmalloc(size, GFP_KERNEL);
	if (!data->fw_data) {
		release_firmware(firmware);
		kfree(data);
		return -ENOMEM;
	}

	memcpy(data->fw_data, firmware->data, firmware->size);
	data->fw_size = firmware->size;
	data->fw_sent = 0;
	release_firmware(firmware);

	usb_set_intfdata(intf, data);
	if (ath3k_load_firmware(data, data->fw_data, data->fw_size)) {
		usb_set_intfdata(intf, NULL);
		kfree(data->fw_data);
		kfree(data);
		return -EIO;
	}

	return 0;
}

static void ath3k_disconnect(struct usb_interface *intf)
{
	struct ath3k_data *data = usb_get_intfdata(intf);

	BT_DBG("ath3k_disconnect intf %p", intf);

	kfree(data->fw_data);
	kfree(data);
}

static struct usb_driver ath3k_driver = {
	.name		= "ath3k",
	.probe		= ath3k_probe,
	.disconnect	= ath3k_disconnect,
	.id_table	= ath3k_table,
};

static int __init ath3k_init(void)
{
	BT_INFO("Atheros AR30xx firmware driver ver %s", VERSION);
	return usb_register(&ath3k_driver);
}

static void __exit ath3k_exit(void)
{
	usb_deregister(&ath3k_driver);
}

module_init(ath3k_init);
module_exit(ath3k_exit);

MODULE_AUTHOR("Atheros Communications");
MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("ath3k-1.fw");