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/kernel.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/types.h>
31 #include <linux/errno.h>
32
33 #include <linux/device.h>
34 #include <linux/firmware.h>
35
36 #include <linux/usb.h>
37
38 #include <net/bluetooth/bluetooth.h>
39
40 #define VERSION "1.2"
41
42 static struct usb_device_id bcm203x_table[] = {
43 /* Broadcom Blutonium (BCM2033) */
44 { USB_DEVICE(0x0a5c, 0x2033) },
45
46 { } /* Terminating entry */
47 };
48
49 MODULE_DEVICE_TABLE(usb, bcm203x_table);
50
51 #define BCM203X_ERROR 0
52 #define BCM203X_RESET 1
53 #define BCM203X_LOAD_MINIDRV 2
54 #define BCM203X_SELECT_MEMORY 3
55 #define BCM203X_CHECK_MEMORY 4
56 #define BCM203X_LOAD_FIRMWARE 5
57 #define BCM203X_CHECK_FIRMWARE 6
58
59 #define BCM203X_IN_EP 0x81
60 #define BCM203X_OUT_EP 0x02
61
62 struct bcm203x_data {
63 struct usb_device *udev;
64
65 unsigned long state;
66
67 struct work_struct work;
68
69 struct urb *urb;
70 unsigned char *buffer;
71
72 unsigned char *fw_data;
73 unsigned int fw_size;
74 unsigned int fw_sent;
75 };
76
77 static void bcm203x_complete(struct urb *urb)
78 {
79 struct bcm203x_data *data = urb->context;
80 struct usb_device *udev = urb->dev;
81 int len;
82
83 BT_DBG("udev %p urb %p", udev, urb);
84
85 if (urb->status) {
86 BT_ERR("URB failed with status %d", urb->status);
87 data->state = BCM203X_ERROR;
88 return;
89 }
90
91 switch (data->state) {
92 case BCM203X_LOAD_MINIDRV:
93 memcpy(data->buffer, "#", 1);
94
95 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
96 data->buffer, 1, bcm203x_complete, data);
97
98 data->state = BCM203X_SELECT_MEMORY;
99
100 schedule_work(&data->work);
101 break;
102
103 case BCM203X_SELECT_MEMORY:
104 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
105 data->buffer, 32, bcm203x_complete, data, 1);
106
107 data->state = BCM203X_CHECK_MEMORY;
108
109 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
110 BT_ERR("Can't submit URB");
111 break;
112
113 case BCM203X_CHECK_MEMORY:
114 if (data->buffer[0] != '#') {
115 BT_ERR("Memory select failed");
116 data->state = BCM203X_ERROR;
117 break;
118 }
119
120 data->state = BCM203X_LOAD_FIRMWARE;
121
122 case BCM203X_LOAD_FIRMWARE:
123 if (data->fw_sent == data->fw_size) {
124 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
125 data->buffer, 32, bcm203x_complete, data, 1);
126
127 data->state = BCM203X_CHECK_FIRMWARE;
128 } else {
129 len = min_t(uint, data->fw_size - data->fw_sent, 4096);
130
131 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
132 data->fw_data + data->fw_sent, len, bcm203x_complete, data);
133
134 data->fw_sent += len;
135 }
136
137 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
138 BT_ERR("Can't submit URB");
139 break;
140
141 case BCM203X_CHECK_FIRMWARE:
142 if (data->buffer[0] != '.') {
143 BT_ERR("Firmware loading failed");
144 data->state = BCM203X_ERROR;
145 break;
146 }
147
148 data->state = BCM203X_RESET;
149 break;
150 }
151 }
152
153 static void bcm203x_work(struct work_struct *work)
154 {
155 struct bcm203x_data *data =
156 container_of(work, struct bcm203x_data, work);
157
158 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
159 BT_ERR("Can't submit URB");
160 }
161
162 static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id)
163 {
164 const struct firmware *firmware;
165 struct usb_device *udev = interface_to_usbdev(intf);
166 struct bcm203x_data *data;
167 int size;
168
169 BT_DBG("intf %p id %p", intf, id);
170
171 if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
172 return -ENODEV;
173
174 data = kzalloc(sizeof(*data), GFP_KERNEL);
175 if (!data) {
176 BT_ERR("Can't allocate memory for data structure");
177 return -ENOMEM;
178 }
179
180 data->udev = udev;
181 data->state = BCM203X_LOAD_MINIDRV;
182
183 data->urb = usb_alloc_urb(0, GFP_KERNEL);
184 if (!data->urb) {
185 BT_ERR("Can't allocate URB");
186 kfree(data);
187 return -ENOMEM;
188 }
189
190 if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
191 BT_ERR("Mini driver request failed");
192 usb_free_urb(data->urb);
193 kfree(data);
194 return -EIO;
195 }
196
197 BT_DBG("minidrv data %p size %zu", firmware->data, firmware->size);
198
199 size = max_t(uint, firmware->size, 4096);
200
201 data->buffer = kmalloc(size, GFP_KERNEL);
202 if (!data->buffer) {
203 BT_ERR("Can't allocate memory for mini driver");
204 release_firmware(firmware);
205 usb_free_urb(data->urb);
206 kfree(data);
207 return -ENOMEM;
208 }
209
210 memcpy(data->buffer, firmware->data, firmware->size);
211
212 usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
213 data->buffer, firmware->size, bcm203x_complete, data);
214
215 release_firmware(firmware);
216
217 if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
218 BT_ERR("Firmware request failed");
219 usb_free_urb(data->urb);
220 kfree(data->buffer);
221 kfree(data);
222 return -EIO;
223 }
224
225 BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
226
227 data->fw_data = kmalloc(firmware->size, GFP_KERNEL);
228 if (!data->fw_data) {
229 BT_ERR("Can't allocate memory for firmware image");
230 release_firmware(firmware);
231 usb_free_urb(data->urb);
232 kfree(data->buffer);
233 kfree(data);
234 return -ENOMEM;
235 }
236
237 memcpy(data->fw_data, firmware->data, firmware->size);
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 schedule_work(&data->work);
248
249 return 0;
250 }
251
252 static void bcm203x_disconnect(struct usb_interface *intf)
253 {
254 struct bcm203x_data *data = usb_get_intfdata(intf);
255
256 BT_DBG("intf %p", intf);
257
258 usb_kill_urb(data->urb);
259
260 usb_set_intfdata(intf, NULL);
261
262 usb_free_urb(data->urb);
263 kfree(data->fw_data);
264 kfree(data->buffer);
265 kfree(data);
266 }
267
268 static struct usb_driver bcm203x_driver = {
269 .name = "bcm203x",
270 .probe = bcm203x_probe,
271 .disconnect = bcm203x_disconnect,
272 .id_table = bcm203x_table,
273 };
274
275 static int __init bcm203x_init(void)
276 {
277 int err;
278
279 BT_INFO("Broadcom Blutonium firmware driver ver %s", VERSION);
280
281 err = usb_register(&bcm203x_driver);
282 if (err < 0)
283 BT_ERR("Failed to register USB driver");
284
285 return err;
286 }
287
288 static void __exit bcm203x_exit(void)
289 {
290 usb_deregister(&bcm203x_driver);
291 }
292
293 module_init(bcm203x_init);
294 module_exit(bcm203x_exit);
295
296 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
297 MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
298 MODULE_VERSION(VERSION);
299 MODULE_LICENSE("GPL");
300 MODULE_FIRMWARE("BCM2033-MD.hex");
301 MODULE_FIRMWARE("BCM2033-FW.bin");
302
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