Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

Linux/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 
 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 
 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 
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 
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 
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 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us