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1/*
2 *
3 *  Broadcom Blutonium firmware driver
4 *
5 *  Copyright (C) 2003  Maxim Krasnyansky <maxk@qualcomm.com>
6 *  Copyright (C) 2003  Marcel Holtmann <marcel@holtmann.org>
7 *
8 *
9 *  This program is free software; you can redistribute it and/or modify
10 *  it under the terms of the GNU General Public License as published by
11 *  the Free Software Foundation; either version 2 of the License, or
12 *  (at your option) any later version.
13 *
14 *  This program is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this program; if not, write to the Free Software
21 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22 *
23 */
24
25#include <linux/module.h>
26
27#include <linux/atomic.h>
28#include <linux/kernel.h>
29#include <linux/init.h>
30#include <linux/slab.h>
31#include <linux/types.h>
32#include <linux/errno.h>
33
34#include <linux/device.h>
35#include <linux/firmware.h>
36
37#include <linux/usb.h>
38
39#include <net/bluetooth/bluetooth.h>
40
41#define VERSION "1.2"
42
43static const struct usb_device_id bcm203x_table[] = {
44	/* Broadcom Blutonium (BCM2033) */
45	{ USB_DEVICE(0x0a5c, 0x2033) },
46
47	{ }	/* Terminating entry */
48};
49
50MODULE_DEVICE_TABLE(usb, bcm203x_table);
51
52#define BCM203X_ERROR		0
53#define BCM203X_RESET		1
54#define BCM203X_LOAD_MINIDRV	2
55#define BCM203X_SELECT_MEMORY	3
56#define BCM203X_CHECK_MEMORY	4
57#define BCM203X_LOAD_FIRMWARE	5
58#define BCM203X_CHECK_FIRMWARE	6
59
60#define BCM203X_IN_EP		0x81
61#define BCM203X_OUT_EP		0x02
62
63struct bcm203x_data {
64	struct usb_device	*udev;
65
66	unsigned long		state;
67
68	struct work_struct	work;
69	atomic_t		shutdown;
70
71	struct urb		*urb;
72	unsigned char		*buffer;
73
74	unsigned char		*fw_data;
75	unsigned int		fw_size;
76	unsigned int		fw_sent;
77};
78
79static void bcm203x_complete(struct urb *urb)
80{
81	struct bcm203x_data *data = urb->context;
82	struct usb_device *udev = urb->dev;
83	int len;
84
85	BT_DBG("udev %p urb %p", udev, urb);
86
87	if (urb->status) {
88		BT_ERR("URB failed with status %d", urb->status);
89		data->state = BCM203X_ERROR;
90		return;
91	}
92
93	switch (data->state) {
94	case BCM203X_LOAD_MINIDRV:
95		memcpy(data->buffer, "#", 1);
96
97		usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
98				data->buffer, 1, bcm203x_complete, data);
99
100		data->state = BCM203X_SELECT_MEMORY;
101
102		/* use workqueue to have a small delay */
103		schedule_work(&data->work);
104		break;
105
106	case BCM203X_SELECT_MEMORY:
107		usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
108				data->buffer, 32, bcm203x_complete, data, 1);
109
110		data->state = BCM203X_CHECK_MEMORY;
111
112		if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
113			BT_ERR("Can't submit URB");
114		break;
115
116	case BCM203X_CHECK_MEMORY:
117		if (data->buffer[0] != '#') {
118			BT_ERR("Memory select failed");
119			data->state = BCM203X_ERROR;
120			break;
121		}
122
123		data->state = BCM203X_LOAD_FIRMWARE;
124
125	case BCM203X_LOAD_FIRMWARE:
126		if (data->fw_sent == data->fw_size) {
127			usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
128				data->buffer, 32, bcm203x_complete, data, 1);
129
130			data->state = BCM203X_CHECK_FIRMWARE;
131		} else {
132			len = min_t(uint, data->fw_size - data->fw_sent, 4096);
133
134			usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
135				data->fw_data + data->fw_sent, len, bcm203x_complete, data);
136
137			data->fw_sent += len;
138		}
139
140		if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
141			BT_ERR("Can't submit URB");
142		break;
143
144	case BCM203X_CHECK_FIRMWARE:
145		if (data->buffer[0] != '.') {
146			BT_ERR("Firmware loading failed");
147			data->state = BCM203X_ERROR;
148			break;
149		}
150
151		data->state = BCM203X_RESET;
152		break;
153	}
154}
155
156static void bcm203x_work(struct work_struct *work)
157{
158	struct bcm203x_data *data =
159		container_of(work, struct bcm203x_data, work);
160
161	if (atomic_read(&data->shutdown))
162		return;
163
164	if (usb_submit_urb(data->urb, GFP_KERNEL) < 0)
165		BT_ERR("Can't submit URB");
166}
167
168static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id)
169{
170	const struct firmware *firmware;
171	struct usb_device *udev = interface_to_usbdev(intf);
172	struct bcm203x_data *data;
173	int size;
174
175	BT_DBG("intf %p id %p", intf, id);
176
177	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
178		return -ENODEV;
179
180	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
181	if (!data) {
182		BT_ERR("Can't allocate memory for data structure");
183		return -ENOMEM;
184	}
185
186	data->udev  = udev;
187	data->state = BCM203X_LOAD_MINIDRV;
188
189	data->urb = usb_alloc_urb(0, GFP_KERNEL);
190	if (!data->urb) {
191		BT_ERR("Can't allocate URB");
192		return -ENOMEM;
193	}
194
195	if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
196		BT_ERR("Mini driver request failed");
197		usb_free_urb(data->urb);
198		return -EIO;
199	}
200
201	BT_DBG("minidrv data %p size %zu", firmware->data, firmware->size);
202
203	size = max_t(uint, firmware->size, 4096);
204
205	data->buffer = kmalloc(size, GFP_KERNEL);
206	if (!data->buffer) {
207		BT_ERR("Can't allocate memory for mini driver");
208		release_firmware(firmware);
209		usb_free_urb(data->urb);
210		return -ENOMEM;
211	}
212
213	memcpy(data->buffer, firmware->data, firmware->size);
214
215	usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
216			data->buffer, firmware->size, bcm203x_complete, data);
217
218	release_firmware(firmware);
219
220	if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
221		BT_ERR("Firmware request failed");
222		usb_free_urb(data->urb);
223		kfree(data->buffer);
224		return -EIO;
225	}
226
227	BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
228
229	data->fw_data = kmemdup(firmware->data, firmware->size, GFP_KERNEL);
230	if (!data->fw_data) {
231		BT_ERR("Can't allocate memory for firmware image");
232		release_firmware(firmware);
233		usb_free_urb(data->urb);
234		kfree(data->buffer);
235		return -ENOMEM;
236	}
237
238	data->fw_size = firmware->size;
239	data->fw_sent = 0;
240
241	release_firmware(firmware);
242
243	INIT_WORK(&data->work, bcm203x_work);
244
245	usb_set_intfdata(intf, data);
246
247	/* use workqueue to have a small delay */
248	schedule_work(&data->work);
249
250	return 0;
251}
252
253static void bcm203x_disconnect(struct usb_interface *intf)
254{
255	struct bcm203x_data *data = usb_get_intfdata(intf);
256
257	BT_DBG("intf %p", intf);
258
259	atomic_inc(&data->shutdown);
260	cancel_work_sync(&data->work);
261
262	usb_kill_urb(data->urb);
263
264	usb_set_intfdata(intf, NULL);
265
266	usb_free_urb(data->urb);
267	kfree(data->fw_data);
268	kfree(data->buffer);
269}
270
271static struct usb_driver bcm203x_driver = {
272	.name		= "bcm203x",
273	.probe		= bcm203x_probe,
274	.disconnect	= bcm203x_disconnect,
275	.id_table	= bcm203x_table,
276	.disable_hub_initiated_lpm = 1,
277};
278
279module_usb_driver(bcm203x_driver);
280
281MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
282MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
283MODULE_VERSION(VERSION);
284MODULE_LICENSE("GPL");
285MODULE_FIRMWARE("BCM2033-MD.hex");
286MODULE_FIRMWARE("BCM2033-FW.bin");
287