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 = kzalloc(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                 kfree(data);
 193                 return -ENOMEM;
 194         }
 195
 196         if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
 197                 BT_ERR("Mini driver request failed");
 198                 usb_free_urb(data->urb);
 199                 kfree(data);
 200                 return -EIO;
 201         }
 202
 203         BT_DBG("minidrv data %p size %zu", firmware->data, firmware->size);
 204
 205         size = max_t(uint, firmware->size, 4096);
 206
 207         data->buffer = kmalloc(size, GFP_KERNEL);
 208         if (!data->buffer) {
 209                 BT_ERR("Can't allocate memory for mini driver");
 210                 release_firmware(firmware);
 211                 usb_free_urb(data->urb);
 212                 kfree(data);
 213                 return -ENOMEM;
 214         }
 215
 216         memcpy(data->buffer, firmware->data, firmware->size);
 217
 218         usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
 219                         data->buffer, firmware->size, bcm203x_complete, data);
 220
 221         release_firmware(firmware);
 222
 223         if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
 224                 BT_ERR("Firmware request failed");
 225                 usb_free_urb(data->urb);
 226                 kfree(data->buffer);
 227                 kfree(data);
 228                 return -EIO;
 229         }
 230
 231         BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
 232
 233         data->fw_data = kmemdup(firmware->data, firmware->size, GFP_KERNEL);
 234         if (!data->fw_data) {
 235                 BT_ERR("Can't allocate memory for firmware image");
 236                 release_firmware(firmware);
 237                 usb_free_urb(data->urb);
 238                 kfree(data->buffer);
 239                 kfree(data);
 240                 return -ENOMEM;
 241         }
 242
 243         data->fw_size = firmware->size;
 244         data->fw_sent = 0;
 245
 246         release_firmware(firmware);
 247
 248         INIT_WORK(&data->work, bcm203x_work);
 249
 250         usb_set_intfdata(intf, data);
 251
 252         /* use workqueue to have a small delay */
 253         schedule_work(&data->work);
 254
 255         return 0;
 256 }
 257
 258 static void bcm203x_disconnect(struct usb_interface *intf)
 259 {
 260         struct bcm203x_data *data = usb_get_intfdata(intf);
 261
 262         BT_DBG("intf %p", intf);
 263
 264         atomic_inc(&data->shutdown);
 265         cancel_work_sync(&data->work);
 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_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 306 MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
 307 MODULE_VERSION(VERSION);
 308 MODULE_LICENSE("GPL");
 309 MODULE_FIRMWARE("BCM2033-MD.hex");
 310 MODULE_FIRMWARE("BCM2033-FW.bin");