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
43 static const struct usb_device_id bcm203x_table[] = {
44 /* Broadcom Blutonium (BCM2033) */
45 { USB_DEVICE(0x0a5c, 0x2033) },
46
47 { } /* Terminating entry */
48 };
49
50 MODULE_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
63 struct 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
bcm203x_complete(struct urb * urb)79 static 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
bcm203x_work(struct work_struct * work)156 static 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
bcm203x_probe(struct usb_interface * intf,const struct usb_device_id * id)168 static 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
bcm203x_disconnect(struct usb_interface * intf)253 static 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
271 static 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
279 module_usb_driver(bcm203x_driver);
280
281 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
282 MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
283 MODULE_VERSION(VERSION);
284 MODULE_LICENSE("GPL");
285 MODULE_FIRMWARE("BCM2033-MD.hex");
286 MODULE_FIRMWARE("BCM2033-FW.bin");
287