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/config.h>
  26 #include <linux/module.h>
  27
  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 #include <linux/timer.h>
  34
  35 #include <linux/device.h>
  36 #include <linux/firmware.h>
  37
  38 #include <linux/usb.h>
  39
  40 #include <net/bluetooth/bluetooth.h>
  41
  42 #ifndef CONFIG_BT_HCIBCM203X_DEBUG
  43 #undef  BT_DBG
  44 #define BT_DBG(D...)
  45 #endif
  46
  47 #define VERSION "1.0"
  48
  49 static int ignore = 0;
  50
  51 static struct usb_device_id bcm203x_table[] = {
  52         /* Broadcom Blutonium (BCM2033) */
  53         { USB_DEVICE(0x0a5c, 0x2033) },
  54
  55         { }     /* Terminating entry */
  56 };
  57
  58 MODULE_DEVICE_TABLE(usb, bcm203x_table);
  59
  60 #define BCM203X_ERROR           0
  61 #define BCM203X_RESET           1
  62 #define BCM203X_LOAD_MINIDRV    2
  63 #define BCM203X_SELECT_MEMORY   3
  64 #define BCM203X_CHECK_MEMORY    4
  65 #define BCM203X_LOAD_FIRMWARE   5
  66 #define BCM203X_CHECK_FIRMWARE  6
  67
  68 #define BCM203X_IN_EP           0x81
  69 #define BCM203X_OUT_EP          0x02
  70
  71 struct bcm203x_data {
  72         struct usb_device       *udev;
  73
  74         unsigned long           state;
  75
  76         struct timer_list       timer;
  77
  78         struct urb              *urb;
  79         unsigned char           *buffer;
  80
  81         unsigned char           *fw_data;
  82         unsigned int            fw_size;
  83         unsigned int            fw_sent;
  84 };
  85
  86 static void bcm203x_complete(struct urb *urb, struct pt_regs *regs)
  87 {
  88         struct bcm203x_data *data = urb->context;
  89         struct usb_device *udev = urb->dev;
  90         int len;
  91
  92         BT_DBG("udev %p urb %p", udev, urb);
  93
  94         if (urb->status) {
  95                 BT_ERR("URB failed with status %d", urb->status);
  96                 data->state = BCM203X_ERROR;
  97                 return;
  98         }
  99
 100         switch (data->state) {
 101         case BCM203X_LOAD_MINIDRV:
 102                 memcpy(data->buffer, "#", 1);
 103
 104                 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
 105                                 data->buffer, 1, bcm203x_complete, data);
 106
 107                 data->state = BCM203X_SELECT_MEMORY;
 108
 109                 mod_timer(&data->timer, jiffies + (HZ / 10));
 110                 break;
 111
 112         case BCM203X_SELECT_MEMORY:
 113                 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
 114                                 data->buffer, 32, bcm203x_complete, data, 1);
 115
 116                 data->state = BCM203X_CHECK_MEMORY;
 117
 118                 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
 119                         BT_ERR("Can't submit URB");
 120                 break;
 121
 122         case BCM203X_CHECK_MEMORY:
 123                 if (data->buffer[0] != '#') {
 124                         BT_ERR("Memory select failed");
 125                         data->state = BCM203X_ERROR;
 126                         break;
 127                 }
 128
 129                 data->state = BCM203X_LOAD_FIRMWARE;
 130
 131         case BCM203X_LOAD_FIRMWARE:
 132                 if (data->fw_sent == data->fw_size) {
 133                         usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
 134                                 data->buffer, 32, bcm203x_complete, data, 1);
 135
 136                         data->state = BCM203X_CHECK_FIRMWARE;
 137                 } else {
 138                         len = min_t(uint, data->fw_size - data->fw_sent, 4096);
 139
 140                         usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
 141                                 data->fw_data + data->fw_sent, len, bcm203x_complete, data);
 142
 143                         data->fw_sent += len;
 144                 }
 145
 146                 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
 147                         BT_ERR("Can't submit URB");
 148                 break;
 149
 150         case BCM203X_CHECK_FIRMWARE:
 151                 if (data->buffer[0] != '.') {
 152                         BT_ERR("Firmware loading failed");
 153                         data->state = BCM203X_ERROR;
 154                         break;
 155                 }
 156
 157                 data->state = BCM203X_RESET;
 158                 break;
 159         }
 160 }
 161
 162 static void bcm203x_timer(unsigned long user_data)
 163 {
 164         struct bcm203x_data *data = (struct bcm203x_data *) user_data;
 165
 166         if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
 167                 BT_ERR("Can't submit URB");
 168 }
 169
 170 static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id)
 171 {
 172         const struct firmware *firmware;
 173         struct usb_device *udev = interface_to_usbdev(intf);
 174         struct bcm203x_data *data;
 175         int size;
 176
 177         BT_DBG("intf %p id %p", intf, id);
 178
 179         if (ignore || (intf->cur_altsetting->desc.bInterfaceNumber != 0))
 180                 return -ENODEV;
 181
 182         data = kzalloc(sizeof(*data), GFP_KERNEL);
 183         if (!data) {
 184                 BT_ERR("Can't allocate memory for data structure");
 185                 return -ENOMEM;
 186         }
 187
 188         data->udev  = udev;
 189         data->state = BCM203X_LOAD_MINIDRV;
 190
 191         data->urb = usb_alloc_urb(0, GFP_KERNEL);
 192         if (!data->urb) {
 193                 BT_ERR("Can't allocate URB");
 194                 kfree(data);
 195                 return -ENOMEM;
 196         }
 197
 198         if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
 199                 BT_ERR("Mini driver request failed");
 200                 usb_free_urb(data->urb);
 201                 kfree(data);
 202                 return -EIO;
 203         }
 204
 205         BT_DBG("minidrv data %p size %d", firmware->data, firmware->size);
 206
 207         size = max_t(uint, firmware->size, 4096);
 208
 209         data->buffer = kmalloc(size, GFP_KERNEL);
 210         if (!data->buffer) {
 211                 BT_ERR("Can't allocate memory for mini driver");
 212                 release_firmware(firmware);
 213                 usb_free_urb(data->urb);
 214                 kfree(data);
 215                 return -ENOMEM;
 216         }
 217
 218         memcpy(data->buffer, firmware->data, firmware->size);
 219
 220         usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
 221                         data->buffer, firmware->size, bcm203x_complete, data);
 222
 223         release_firmware(firmware);
 224
 225         if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
 226                 BT_ERR("Firmware request failed");
 227                 usb_free_urb(data->urb);
 228                 kfree(data->buffer);
 229                 kfree(data);
 230                 return -EIO;
 231         }
 232
 233         BT_DBG("firmware data %p size %d", firmware->data, firmware->size);
 234
 235         data->fw_data = kmalloc(firmware->size, GFP_KERNEL);
 236         if (!data->fw_data) {
 237                 BT_ERR("Can't allocate memory for firmware image");
 238                 usb_free_urb(data->urb);
 239                 kfree(data->buffer);
 240                 kfree(data);
 241                 return -ENOMEM;
 242         }
 243
 244         memcpy(data->fw_data, firmware->data, firmware->size);
 245         data->fw_size = firmware->size;
 246         data->fw_sent = 0;
 247
 248         release_firmware(firmware);
 249
 250         init_timer(&data->timer);
 251         data->timer.function = bcm203x_timer;
 252         data->timer.data = (unsigned long) data;
 253
 254         usb_set_intfdata(intf, data);
 255
 256         mod_timer(&data->timer, jiffies + HZ);
 257
 258         return 0;
 259 }
 260
 261 static void bcm203x_disconnect(struct usb_interface *intf)
 262 {
 263         struct bcm203x_data *data = usb_get_intfdata(intf);
 264
 265         BT_DBG("intf %p", intf);
 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_param(ignore, bool, 0644);
 306 MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");
 307
 308 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 309 MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
 310 MODULE_VERSION(VERSION);
 311 MODULE_LICENSE("GPL");