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
49 static int ignore = 0;
50
51 static struct usb_device_id bcm203x_table[] = {
52 /* Broadcom Blutonium (BCM2033) */
53 { USB_DEVICE(0x0a5c, 0x2033) },
54
55 { } /* Terminating entry */
56 };
57
58 MODULE_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
71 struct 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
86 static 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
162 static 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
170 static 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 = kzalloc(sizeof(*data), GFP_KERNEL);
183 if (!data) {
184 BT_ERR("Can't allocate memory for data structure");
185 return -ENOMEM;
186 }
187
188 data->udev = udev;
189 data->state = BCM203X_LOAD_MINIDRV;
190
191 data->urb = usb_alloc_urb(0, GFP_KERNEL);
192 if (!data->urb) {
193 BT_ERR("Can't allocate URB");
194 kfree(data);
195 return -ENOMEM;
196 }
197
198 if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
199 BT_ERR("Mini driver request failed");
200 usb_free_urb(data->urb);
201 kfree(data);
202 return -EIO;
203 }
204
205 BT_DBG("minidrv data %p size %d", firmware->data, firmware->size);
206
207 size = max_t(uint, firmware->size, 4096);
208
209 data->buffer = kmalloc(size, GFP_KERNEL);
210 if (!data->buffer) {
211 BT_ERR("Can't allocate memory for mini driver");
212 release_firmware(firmware);
213 usb_free_urb(data->urb);
214 kfree(data);
215 return -ENOMEM;
216 }
217
218 memcpy(data->buffer, firmware->data, firmware->size);
219
220 usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
221 data->buffer, firmware->size, bcm203x_complete, data);
222
223 release_firmware(firmware);
224
225 if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
226 BT_ERR("Firmware request failed");
227 usb_free_urb(data->urb);
228 kfree(data->buffer);
229 kfree(data);
230 return -EIO;
231 }
232
233 BT_DBG("firmware data %p size %d", firmware->data, firmware->size);
234
235 data->fw_data = kmalloc(firmware->size, GFP_KERNEL);
236 if (!data->fw_data) {
237 BT_ERR("Can't allocate memory for firmware image");
238 usb_free_urb(data->urb);
239 kfree(data->buffer);
240 kfree(data);
241 return -ENOMEM;
242 }
243
244 memcpy(data->fw_data, firmware->data, firmware->size);
245 data->fw_size = firmware->size;
246 data->fw_sent = 0;
247
248 release_firmware(firmware);
249
250 init_timer(&data->timer);
251 data->timer.function = bcm203x_timer;
252 data->timer.data = (unsigned long) data;
253
254 usb_set_intfdata(intf, data);
255
256 mod_timer(&data->timer, jiffies + HZ);
257
258 return 0;
259 }
260
261 static void bcm203x_disconnect(struct usb_interface *intf)
262 {
263 struct bcm203x_data *data = usb_get_intfdata(intf);
264
265 BT_DBG("intf %p", intf);
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
277 static struct usb_driver bcm203x_driver = {
278 .name = "bcm203x",
279 .probe = bcm203x_probe,
280 .disconnect = bcm203x_disconnect,
281 .id_table = bcm203x_table,
282 };
283
284 static int __init bcm203x_init(void)
285 {
286 int err;
287
288 BT_INFO("Broadcom Blutonium firmware driver ver %s", VERSION);
289
290 err = usb_register(&bcm203x_driver);
291 if (err < 0)
292 BT_ERR("Failed to register USB driver");
293
294 return err;
295 }
296
297 static void __exit bcm203x_exit(void)
298 {
299 usb_deregister(&bcm203x_driver);
300 }
301
302 module_init(bcm203x_init);
303 module_exit(bcm203x_exit);
304
305 module_param(ignore, bool, 0644);
306 MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");
307
308 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
309 MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
310 MODULE_VERSION(VERSION);
311 MODULE_LICENSE("GPL");
312
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