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/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 #ifndef CONFIG_BT_HCIBCM203X_DEBUG
  41 #undef  BT_DBG
  42 #define BT_DBG(D...)
  43 #endif
  44
  45 #define VERSION "1.2"
  46
  47 static struct usb_device_id bcm203x_table[] = {
  48         /* Broadcom Blutonium (BCM2033) */
  49         { USB_DEVICE(0x0a5c, 0x2033) },
  50
  51         { }     /* Terminating entry */
  52 };
  53
  54 MODULE_DEVICE_TABLE(usb, bcm203x_table);
  55
  56 #define BCM203X_ERROR           0
  57 #define BCM203X_RESET           1
  58 #define BCM203X_LOAD_MINIDRV    2
  59 #define BCM203X_SELECT_MEMORY   3
  60 #define BCM203X_CHECK_MEMORY    4
  61 #define BCM203X_LOAD_FIRMWARE   5
  62 #define BCM203X_CHECK_FIRMWARE  6
  63
  64 #define BCM203X_IN_EP           0x81
  65 #define BCM203X_OUT_EP          0x02
  66
  67 struct bcm203x_data {
  68         struct usb_device       *udev;
  69
  70         unsigned long           state;
  71
  72         struct work_struct      work;
  73
  74         struct urb              *urb;
  75         unsigned char           *buffer;
  76
  77         unsigned char           *fw_data;
  78         unsigned int            fw_size;
  79         unsigned int            fw_sent;
  80 };
  81
  82 static void bcm203x_complete(struct urb *urb)
  83 {
  84         struct bcm203x_data *data = urb->context;
  85         struct usb_device *udev = urb->dev;
  86         int len;
  87
  88         BT_DBG("udev %p urb %p", udev, urb);
  89
  90         if (urb->status) {
  91                 BT_ERR("URB failed with status %d", urb->status);
  92                 data->state = BCM203X_ERROR;
  93                 return;
  94         }
  95
  96         switch (data->state) {
  97         case BCM203X_LOAD_MINIDRV:
  98                 memcpy(data->buffer, "#", 1);
  99
 100                 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
 101                                 data->buffer, 1, bcm203x_complete, data);
 102
 103                 data->state = BCM203X_SELECT_MEMORY;
 104
 105                 schedule_work(&data->work);
 106                 break;
 107
 108         case BCM203X_SELECT_MEMORY:
 109                 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
 110                                 data->buffer, 32, bcm203x_complete, data, 1);
 111
 112                 data->state = BCM203X_CHECK_MEMORY;
 113
 114                 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
 115                         BT_ERR("Can't submit URB");
 116                 break;
 117
 118         case BCM203X_CHECK_MEMORY:
 119                 if (data->buffer[0] != '#') {
 120                         BT_ERR("Memory select failed");
 121                         data->state = BCM203X_ERROR;
 122                         break;
 123                 }
 124
 125                 data->state = BCM203X_LOAD_FIRMWARE;
 126
 127         case BCM203X_LOAD_FIRMWARE:
 128                 if (data->fw_sent == data->fw_size) {
 129                         usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
 130                                 data->buffer, 32, bcm203x_complete, data, 1);
 131
 132                         data->state = BCM203X_CHECK_FIRMWARE;
 133                 } else {
 134                         len = min_t(uint, data->fw_size - data->fw_sent, 4096);
 135
 136                         usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
 137                                 data->fw_data + data->fw_sent, len, bcm203x_complete, data);
 138
 139                         data->fw_sent += len;
 140                 }
 141
 142                 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
 143                         BT_ERR("Can't submit URB");
 144                 break;
 145
 146         case BCM203X_CHECK_FIRMWARE:
 147                 if (data->buffer[0] != '.') {
 148                         BT_ERR("Firmware loading failed");
 149                         data->state = BCM203X_ERROR;
 150                         break;
 151                 }
 152
 153                 data->state = BCM203X_RESET;
 154                 break;
 155         }
 156 }
 157
 158 static void bcm203x_work(struct work_struct *work)
 159 {
 160         struct bcm203x_data *data =
 161                 container_of(work, struct bcm203x_data, work);
 162
 163         if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
 164                 BT_ERR("Can't submit URB");
 165 }
 166
 167 static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id)
 168 {
 169         const struct firmware *firmware;
 170         struct usb_device *udev = interface_to_usbdev(intf);
 171         struct bcm203x_data *data;
 172         int size;
 173
 174         BT_DBG("intf %p id %p", intf, id);
 175
 176         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 177                 return -ENODEV;
 178
 179         data = kzalloc(sizeof(*data), GFP_KERNEL);
 180         if (!data) {
 181                 BT_ERR("Can't allocate memory for data structure");
 182                 return -ENOMEM;
 183         }
 184
 185         data->udev  = udev;
 186         data->state = BCM203X_LOAD_MINIDRV;
 187
 188         data->urb = usb_alloc_urb(0, GFP_KERNEL);
 189         if (!data->urb) {
 190                 BT_ERR("Can't allocate URB");
 191                 kfree(data);
 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                 kfree(data);
 199                 return -EIO;
 200         }
 201
 202         BT_DBG("minidrv data %p size %d", firmware->data, firmware->size);
 203
 204         size = max_t(uint, firmware->size, 4096);
 205
 206         data->buffer = kmalloc(size, GFP_KERNEL);
 207         if (!data->buffer) {
 208                 BT_ERR("Can't allocate memory for mini driver");
 209                 release_firmware(firmware);
 210                 usb_free_urb(data->urb);
 211                 kfree(data);
 212                 return -ENOMEM;
 213         }
 214
 215         memcpy(data->buffer, firmware->data, firmware->size);
 216
 217         usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
 218                         data->buffer, firmware->size, bcm203x_complete, data);
 219
 220         release_firmware(firmware);
 221
 222         if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
 223                 BT_ERR("Firmware request failed");
 224                 usb_free_urb(data->urb);
 225                 kfree(data->buffer);
 226                 kfree(data);
 227                 return -EIO;
 228         }
 229
 230         BT_DBG("firmware data %p size %d", firmware->data, firmware->size);
 231
 232         data->fw_data = kmalloc(firmware->size, GFP_KERNEL);
 233         if (!data->fw_data) {
 234                 BT_ERR("Can't allocate memory for firmware image");
 235                 release_firmware(firmware);
 236                 usb_free_urb(data->urb);
 237                 kfree(data->buffer);
 238                 kfree(data);
 239                 return -ENOMEM;
 240         }
 241
 242         memcpy(data->fw_data, firmware->data, firmware->size);
 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         schedule_work(&data->work);
 253
 254         return 0;
 255 }
 256
 257 static void bcm203x_disconnect(struct usb_interface *intf)
 258 {
 259         struct bcm203x_data *data = usb_get_intfdata(intf);
 260
 261         BT_DBG("intf %p", intf);
 262
 263         usb_kill_urb(data->urb);
 264
 265         usb_set_intfdata(intf, NULL);
 266
 267         usb_free_urb(data->urb);
 268         kfree(data->fw_data);
 269         kfree(data->buffer);
 270         kfree(data);
 271 }
 272
 273 static struct usb_driver bcm203x_driver = {
 274         .name           = "bcm203x",
 275         .probe          = bcm203x_probe,
 276         .disconnect     = bcm203x_disconnect,
 277         .id_table       = bcm203x_table,
 278 };
 279
 280 static int __init bcm203x_init(void)
 281 {
 282         int err;
 283
 284         BT_INFO("Broadcom Blutonium firmware driver ver %s", VERSION);
 285
 286         err = usb_register(&bcm203x_driver);
 287         if (err < 0)
 288                 BT_ERR("Failed to register USB driver");
 289
 290         return err;
 291 }
 292
 293 static void __exit bcm203x_exit(void)
 294 {
 295         usb_deregister(&bcm203x_driver);
 296 }
 297
 298 module_init(bcm203x_init);
 299 module_exit(bcm203x_exit);
 300
 301 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 302 MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
 303 MODULE_VERSION(VERSION);
 304 MODULE_LICENSE("GPL");
 305 MODULE_FIRMWARE("BCM2033-MD.hex");
 306 MODULE_FIRMWARE("BCM2033-FW.bin");