Root/drivers/bluetooth/bcm203x.c

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 = kzalloc(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        kfree(data);
193        return -ENOMEM;
194    }
195
196    if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
197        BT_ERR("Mini driver request failed");
198        usb_free_urb(data->urb);
199        kfree(data);
200        return -EIO;
201    }
202
203    BT_DBG("minidrv data %p size %zu", firmware->data, firmware->size);
204
205    size = max_t(uint, firmware->size, 4096);
206
207    data->buffer = kmalloc(size, GFP_KERNEL);
208    if (!data->buffer) {
209        BT_ERR("Can't allocate memory for mini driver");
210        release_firmware(firmware);
211        usb_free_urb(data->urb);
212        kfree(data);
213        return -ENOMEM;
214    }
215
216    memcpy(data->buffer, firmware->data, firmware->size);
217
218    usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
219            data->buffer, firmware->size, bcm203x_complete, data);
220
221    release_firmware(firmware);
222
223    if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
224        BT_ERR("Firmware request failed");
225        usb_free_urb(data->urb);
226        kfree(data->buffer);
227        kfree(data);
228        return -EIO;
229    }
230
231    BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
232
233    data->fw_data = kmemdup(firmware->data, firmware->size, GFP_KERNEL);
234    if (!data->fw_data) {
235        BT_ERR("Can't allocate memory for firmware image");
236        release_firmware(firmware);
237        usb_free_urb(data->urb);
238        kfree(data->buffer);
239        kfree(data);
240        return -ENOMEM;
241    }
242
243    data->fw_size = firmware->size;
244    data->fw_sent = 0;
245
246    release_firmware(firmware);
247
248    INIT_WORK(&data->work, bcm203x_work);
249
250    usb_set_intfdata(intf, data);
251
252    /* use workqueue to have a small delay */
253    schedule_work(&data->work);
254
255    return 0;
256}
257
258static void bcm203x_disconnect(struct usb_interface *intf)
259{
260    struct bcm203x_data *data = usb_get_intfdata(intf);
261
262    BT_DBG("intf %p", intf);
263
264    atomic_inc(&data->shutdown);
265    cancel_work_sync(&data->work);
266
267    usb_kill_urb(data->urb);
268
269    usb_set_intfdata(intf, NULL);
270
271    usb_free_urb(data->urb);
272    kfree(data->fw_data);
273    kfree(data->buffer);
274    kfree(data);
275}
276
277static struct usb_driver bcm203x_driver = {
278    .name = "bcm203x",
279    .probe = bcm203x_probe,
280    .disconnect = bcm203x_disconnect,
281    .id_table = bcm203x_table,
282    .disable_hub_initiated_lpm = 1,
283};
284
285module_usb_driver(bcm203x_driver);
286
287MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
288MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
289MODULE_VERSION(VERSION);
290MODULE_LICENSE("GPL");
291MODULE_FIRMWARE("BCM2033-MD.hex");
292MODULE_FIRMWARE("BCM2033-FW.bin");
293

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