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