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 #define VERSION "1.2"
  41
  42 static const 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 = kmemdup(firmware->data, 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         data->fw_size = firmware->size;
 238         data->fw_sent = 0;
 239
 240         release_firmware(firmware);
 241
 242         INIT_WORK(&data->work, bcm203x_work);
 243
 244         usb_set_intfdata(intf, data);
 245
 246         schedule_work(&data->work);
 247
 248         return 0;
 249 }
 250
 251 static void bcm203x_disconnect(struct usb_interface *intf)
 252 {
 253         struct bcm203x_data *data = usb_get_intfdata(intf);
 254
 255         BT_DBG("intf %p", intf);
 256
 257         usb_kill_urb(data->urb);
 258
 259         usb_set_intfdata(intf, NULL);
 260
 261         usb_free_urb(data->urb);
 262         kfree(data->fw_data);
 263         kfree(data->buffer);
 264         kfree(data);
 265 }
 266
 267 static struct usb_driver bcm203x_driver = {
 268         .name           = "bcm203x",
 269         .probe          = bcm203x_probe,
 270         .disconnect     = bcm203x_disconnect,
 271         .id_table       = bcm203x_table,
 272 };
 273
 274 static int __init bcm203x_init(void)
 275 {
 276         int err;
 277
 278         BT_INFO("Broadcom Blutonium firmware driver ver %s", VERSION);
 279
 280         err = usb_register(&bcm203x_driver);
 281         if (err < 0)
 282                 BT_ERR("Failed to register USB driver");
 283
 284         return err;
 285 }
 286
 287 static void __exit bcm203x_exit(void)
 288 {
 289         usb_deregister(&bcm203x_driver);
 290 }
 291
 292 module_init(bcm203x_init);
 293 module_exit(bcm203x_exit);
 294
 295 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 296 MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
 297 MODULE_VERSION(VERSION);
 298 MODULE_LICENSE("GPL");
 299 MODULE_FIRMWARE("BCM2033-MD.hex");
 300 MODULE_FIRMWARE("BCM2033-FW.bin");