tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/config.h>
26#include <linux/module.h>
27
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#include <linux/timer.h>
34
35#include <linux/device.h>
36#include <linux/firmware.h>
37
38#include <linux/usb.h>
39
40#include <net/bluetooth/bluetooth.h>
41
42#ifndef CONFIG_BT_HCIBCM203X_DEBUG
43#undef BT_DBG
44#define BT_DBG(D...)
45#endif
46
47#define VERSION "1.0"
48
49static int ignore = 0;
50
51static struct usb_device_id bcm203x_table[] = {
52 /* Broadcom Blutonium (BCM2033) */
53 { USB_DEVICE(0x0a5c, 0x2033) },
54
55 { } /* Terminating entry */
56};
57
58MODULE_DEVICE_TABLE(usb, bcm203x_table);
59
60#define BCM203X_ERROR 0
61#define BCM203X_RESET 1
62#define BCM203X_LOAD_MINIDRV 2
63#define BCM203X_SELECT_MEMORY 3
64#define BCM203X_CHECK_MEMORY 4
65#define BCM203X_LOAD_FIRMWARE 5
66#define BCM203X_CHECK_FIRMWARE 6
67
68#define BCM203X_IN_EP 0x81
69#define BCM203X_OUT_EP 0x02
70
71struct bcm203x_data {
72 struct usb_device *udev;
73
74 unsigned long state;
75
76 struct timer_list timer;
77
78 struct urb *urb;
79 unsigned char *buffer;
80
81 unsigned char *fw_data;
82 unsigned int fw_size;
83 unsigned int fw_sent;
84};
85
86static void bcm203x_complete(struct urb *urb, struct pt_regs *regs)
87{
88 struct bcm203x_data *data = urb->context;
89 struct usb_device *udev = urb->dev;
90 int len;
91
92 BT_DBG("udev %p urb %p", udev, urb);
93
94 if (urb->status) {
95 BT_ERR("URB failed with status %d", urb->status);
96 data->state = BCM203X_ERROR;
97 return;
98 }
99
100 switch (data->state) {
101 case BCM203X_LOAD_MINIDRV:
102 memcpy(data->buffer, "#", 1);
103
104 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
105 data->buffer, 1, bcm203x_complete, data);
106
107 data->state = BCM203X_SELECT_MEMORY;
108
109 mod_timer(&data->timer, jiffies + (HZ / 10));
110 break;
111
112 case BCM203X_SELECT_MEMORY:
113 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
114 data->buffer, 32, bcm203x_complete, data, 1);
115
116 data->state = BCM203X_CHECK_MEMORY;
117
118 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
119 BT_ERR("Can't submit URB");
120 break;
121
122 case BCM203X_CHECK_MEMORY:
123 if (data->buffer[0] != '#') {
124 BT_ERR("Memory select failed");
125 data->state = BCM203X_ERROR;
126 break;
127 }
128
129 data->state = BCM203X_LOAD_FIRMWARE;
130
131 case BCM203X_LOAD_FIRMWARE:
132 if (data->fw_sent == data->fw_size) {
133 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
134 data->buffer, 32, bcm203x_complete, data, 1);
135
136 data->state = BCM203X_CHECK_FIRMWARE;
137 } else {
138 len = min_t(uint, data->fw_size - data->fw_sent, 4096);
139
140 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
141 data->fw_data + data->fw_sent, len, bcm203x_complete, data);
142
143 data->fw_sent += len;
144 }
145
146 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
147 BT_ERR("Can't submit URB");
148 break;
149
150 case BCM203X_CHECK_FIRMWARE:
151 if (data->buffer[0] != '.') {
152 BT_ERR("Firmware loading failed");
153 data->state = BCM203X_ERROR;
154 break;
155 }
156
157 data->state = BCM203X_RESET;
158 break;
159 }
160}
161
162static void bcm203x_timer(unsigned long user_data)
163{
164 struct bcm203x_data *data = (struct bcm203x_data *) user_data;
165
166 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
167 BT_ERR("Can't submit URB");
168}
169
170static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id)
171{
172 const struct firmware *firmware;
173 struct usb_device *udev = interface_to_usbdev(intf);
174 struct bcm203x_data *data;
175 int size;
176
177 BT_DBG("intf %p id %p", intf, id);
178
179 if (ignore || (intf->cur_altsetting->desc.bInterfaceNumber != 0))
180 return -ENODEV;
181
182 data = kmalloc(sizeof(*data), GFP_KERNEL);
183 if (!data) {
184 BT_ERR("Can't allocate memory for data structure");
185 return -ENOMEM;
186 }
187
188 memset(data, 0, sizeof(*data));
189
190 data->udev = udev;
191 data->state = BCM203X_LOAD_MINIDRV;
192
193 data->urb = usb_alloc_urb(0, GFP_KERNEL);
194 if (!data->urb) {
195 BT_ERR("Can't allocate URB");
196 kfree(data);
197 return -ENOMEM;
198 }
199
200 if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
201 BT_ERR("Mini driver request failed");
202 usb_free_urb(data->urb);
203 kfree(data);
204 return -EIO;
205 }
206
207 BT_DBG("minidrv data %p size %d", firmware->data, firmware->size);
208
209 size = max_t(uint, firmware->size, 4096);
210
211 data->buffer = kmalloc(size, GFP_KERNEL);
212 if (!data->buffer) {
213 BT_ERR("Can't allocate memory for mini driver");
214 release_firmware(firmware);
215 usb_free_urb(data->urb);
216 kfree(data);
217 return -ENOMEM;
218 }
219
220 memcpy(data->buffer, firmware->data, firmware->size);
221
222 usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
223 data->buffer, firmware->size, bcm203x_complete, data);
224
225 release_firmware(firmware);
226
227 if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
228 BT_ERR("Firmware request failed");
229 usb_free_urb(data->urb);
230 kfree(data->buffer);
231 kfree(data);
232 return -EIO;
233 }
234
235 BT_DBG("firmware data %p size %d", firmware->data, firmware->size);
236
237 data->fw_data = kmalloc(firmware->size, GFP_KERNEL);
238 if (!data->fw_data) {
239 BT_ERR("Can't allocate memory for firmware image");
240 usb_free_urb(data->urb);
241 kfree(data->buffer);
242 kfree(data);
243 return -ENOMEM;
244 }
245
246 memcpy(data->fw_data, firmware->data, firmware->size);
247 data->fw_size = firmware->size;
248 data->fw_sent = 0;
249
250 release_firmware(firmware);
251
252 init_timer(&data->timer);
253 data->timer.function = bcm203x_timer;
254 data->timer.data = (unsigned long) data;
255
256 usb_set_intfdata(intf, data);
257
258 mod_timer(&data->timer, jiffies + HZ);
259
260 return 0;
261}
262
263static void bcm203x_disconnect(struct usb_interface *intf)
264{
265 struct bcm203x_data *data = usb_get_intfdata(intf);
266
267 BT_DBG("intf %p", intf);
268
269 usb_kill_urb(data->urb);
270
271 usb_set_intfdata(intf, NULL);
272
273 usb_free_urb(data->urb);
274 kfree(data->fw_data);
275 kfree(data->buffer);
276 kfree(data);
277}
278
279static struct usb_driver bcm203x_driver = {
280 .owner = THIS_MODULE,
281 .name = "bcm203x",
282 .probe = bcm203x_probe,
283 .disconnect = bcm203x_disconnect,
284 .id_table = bcm203x_table,
285};
286
287static int __init bcm203x_init(void)
288{
289 int err;
290
291 BT_INFO("Broadcom Blutonium firmware driver ver %s", VERSION);
292
293 err = usb_register(&bcm203x_driver);
294 if (err < 0)
295 BT_ERR("Failed to register USB driver");
296
297 return err;
298}
299
300static void __exit bcm203x_exit(void)
301{
302 usb_deregister(&bcm203x_driver);
303}
304
305module_init(bcm203x_init);
306module_exit(bcm203x_exit);
307
308module_param(ignore, bool, 0644);
309MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");
310
311MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
312MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
313MODULE_VERSION(VERSION);
314MODULE_LICENSE("GPL");