drivers/bluetooth/ath3k.c

   1 /*
   2  * Copyright (c) 2008-2009 Atheros Communications Inc.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  */
  19
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/slab.h>
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/device.h>
  28 #include <linux/firmware.h>
  29 #include <linux/usb.h>
  30 #include <net/bluetooth/bluetooth.h>
  31
  32 #define VERSION "1.0"
  33
  34 #define ATH3K_DNLOAD                            0x01
  35 #define ATH3K_GETSTATE                          0x05
  36 #define ATH3K_SET_NORMAL_MODE                   0x07
  37 #define ATH3K_GETVERSION                        0x09
  38 #define USB_REG_SWITCH_VID_PID                  0x0a
  39
  40 #define ATH3K_MODE_MASK                         0x3F
  41 #define ATH3K_NORMAL_MODE                       0x0E
  42
  43 #define ATH3K_PATCH_UPDATE                      0x80
  44 #define ATH3K_SYSCFG_UPDATE                     0x40
  45
  46 #define ATH3K_XTAL_FREQ_26M                     0x00
  47 #define ATH3K_XTAL_FREQ_40M                     0x01
  48 #define ATH3K_XTAL_FREQ_19P2                    0x02
  49 #define ATH3K_NAME_LEN                          0xFF
  50
  51 struct ath3k_version {
  52         unsigned int    rom_version;
  53         unsigned int    build_version;
  54         unsigned int    ram_version;
  55         unsigned char   ref_clock;
  56         unsigned char   reserved[0x07];
  57 };
  58
  59 static struct usb_device_id ath3k_table[] = {
  60         /* Atheros AR3011 */
  61         { USB_DEVICE(0x0CF3, 0x3000) },
  62
  63         /* Atheros AR3011 with sflash firmware*/
  64         { USB_DEVICE(0x0CF3, 0x3002) },
  65         { USB_DEVICE(0x13d3, 0x3304) },
  66         { USB_DEVICE(0x0930, 0x0215) },
  67
  68         /* Atheros AR9285 Malbec with sflash firmware */
  69         { USB_DEVICE(0x03F0, 0x311D) },
  70
  71         /* Atheros AR3012 with sflash firmware*/
  72         { USB_DEVICE(0x0CF3, 0x3004) },
  73
  74         /* Atheros AR5BBU12 with sflash firmware */
  75         { USB_DEVICE(0x0489, 0xE02C) },
  76
  77         { }     /* Terminating entry */
  78 };
  79
  80 MODULE_DEVICE_TABLE(usb, ath3k_table);
  81
  82 #define BTUSB_ATH3012           0x80
  83 /* This table is to load patch and sysconfig files
  84  * for AR3012 */
  85 static struct usb_device_id ath3k_blist_tbl[] = {
  86
  87         /* Atheros AR3012 with sflash firmware*/
  88         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
  89
  90         { }     /* Terminating entry */
  91 };
  92
  93 #define USB_REQ_DFU_DNLOAD      1
  94 #define BULK_SIZE               4096
  95 #define FW_HDR_SIZE             20
  96
  97 static int ath3k_load_firmware(struct usb_device *udev,
  98                                 const struct firmware *firmware)
  99 {
 100         u8 *send_buf;
 101         int err, pipe, len, size, sent = 0;
 102         int count = firmware->size;
 103
 104         BT_DBG("udev %p", udev);
 105
 106         pipe = usb_sndctrlpipe(udev, 0);
 107
 108         send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
 109         if (!send_buf) {
 110                 BT_ERR("Can't allocate memory chunk for firmware");
 111                 return -ENOMEM;
 112         }
 113
 114         memcpy(send_buf, firmware->data, 20);
 115         if ((err = usb_control_msg(udev, pipe,
 116                                 USB_REQ_DFU_DNLOAD,
 117                                 USB_TYPE_VENDOR, 0, 0,
 118                                 send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
 119                 BT_ERR("Can't change to loading configuration err");
 120                 goto error;
 121         }
 122         sent += 20;
 123         count -= 20;
 124
 125         while (count) {
 126                 size = min_t(uint, count, BULK_SIZE);
 127                 pipe = usb_sndbulkpipe(udev, 0x02);
 128                 memcpy(send_buf, firmware->data + sent, size);
 129
 130                 err = usb_bulk_msg(udev, pipe, send_buf, size,
 131                                         &len, 3000);
 132
 133                 if (err || (len != size)) {
 134                         BT_ERR("Error in firmware loading err = %d,"
 135                                 "len = %d, size = %d", err, len, size);
 136                         goto error;
 137                 }
 138
 139                 sent  += size;
 140                 count -= size;
 141         }
 142
 143 error:
 144         kfree(send_buf);
 145         return err;
 146 }
 147
 148 static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
 149 {
 150         int pipe = 0;
 151
 152         pipe = usb_rcvctrlpipe(udev, 0);
 153         return usb_control_msg(udev, pipe, ATH3K_GETSTATE,
 154                         USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
 155                         state, 0x01, USB_CTRL_SET_TIMEOUT);
 156 }
 157
 158 static int ath3k_get_version(struct usb_device *udev,
 159                         struct ath3k_version *version)
 160 {
 161         int pipe = 0;
 162
 163         pipe = usb_rcvctrlpipe(udev, 0);
 164         return usb_control_msg(udev, pipe, ATH3K_GETVERSION,
 165                         USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, version,
 166                         sizeof(struct ath3k_version),
 167                         USB_CTRL_SET_TIMEOUT);
 168 }
 169
 170 static int ath3k_load_fwfile(struct usb_device *udev,
 171                 const struct firmware *firmware)
 172 {
 173         u8 *send_buf;
 174         int err, pipe, len, size, count, sent = 0;
 175         int ret;
 176
 177         count = firmware->size;
 178
 179         send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
 180         if (!send_buf) {
 181                 BT_ERR("Can't allocate memory chunk for firmware");
 182                 return -ENOMEM;
 183         }
 184
 185         size = min_t(uint, count, FW_HDR_SIZE);
 186         memcpy(send_buf, firmware->data, size);
 187
 188         pipe = usb_sndctrlpipe(udev, 0);
 189         ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
 190                         USB_TYPE_VENDOR, 0, 0, send_buf,
 191                         size, USB_CTRL_SET_TIMEOUT);
 192         if (ret < 0) {
 193                 BT_ERR("Can't change to loading configuration err");
 194                 kfree(send_buf);
 195                 return ret;
 196         }
 197
 198         sent += size;
 199         count -= size;
 200
 201         while (count) {
 202                 size = min_t(uint, count, BULK_SIZE);
 203                 pipe = usb_sndbulkpipe(udev, 0x02);
 204
 205                 memcpy(send_buf, firmware->data + sent, size);
 206
 207                 err = usb_bulk_msg(udev, pipe, send_buf, size,
 208                                         &len, 3000);
 209                 if (err || (len != size)) {
 210                         BT_ERR("Error in firmware loading err = %d,"
 211                                 "len = %d, size = %d", err, len, size);
 212                         kfree(send_buf);
 213                         return err;
 214                 }
 215                 sent  += size;
 216                 count -= size;
 217         }
 218
 219         kfree(send_buf);
 220         return 0;
 221 }
 222
 223 static int ath3k_switch_pid(struct usb_device *udev)
 224 {
 225         int pipe = 0;
 226
 227         pipe = usb_sndctrlpipe(udev, 0);
 228         return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
 229                         USB_TYPE_VENDOR, 0, 0,
 230                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 231 }
 232
 233 static int ath3k_set_normal_mode(struct usb_device *udev)
 234 {
 235         unsigned char fw_state;
 236         int pipe = 0, ret;
 237
 238         ret = ath3k_get_state(udev, &fw_state);
 239         if (ret < 0) {
 240                 BT_ERR("Can't get state to change to normal mode err");
 241                 return ret;
 242         }
 243
 244         if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
 245                 BT_DBG("firmware was already in normal mode");
 246                 return 0;
 247         }
 248
 249         pipe = usb_sndctrlpipe(udev, 0);
 250         return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
 251                         USB_TYPE_VENDOR, 0, 0,
 252                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 253 }
 254
 255 static int ath3k_load_patch(struct usb_device *udev)
 256 {
 257         unsigned char fw_state;
 258         char filename[ATH3K_NAME_LEN] = {0};
 259         const struct firmware *firmware;
 260         struct ath3k_version fw_version, pt_version;
 261         int ret;
 262
 263         ret = ath3k_get_state(udev, &fw_state);
 264         if (ret < 0) {
 265                 BT_ERR("Can't get state to change to load ram patch err");
 266                 return ret;
 267         }
 268
 269         if (fw_state & ATH3K_PATCH_UPDATE) {
 270                 BT_DBG("Patch was already downloaded");
 271                 return 0;
 272         }
 273
 274         ret = ath3k_get_version(udev, &fw_version);
 275         if (ret < 0) {
 276                 BT_ERR("Can't get version to change to load ram patch err");
 277                 return ret;
 278         }
 279
 280         snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
 281                 fw_version.rom_version);
 282
 283         ret = request_firmware(&firmware, filename, &udev->dev);
 284         if (ret < 0) {
 285                 BT_ERR("Patch file not found %s", filename);
 286                 return ret;
 287         }
 288
 289         pt_version.rom_version = *(int *)(firmware->data + firmware->size - 8);
 290         pt_version.build_version = *(int *)
 291                 (firmware->data + firmware->size - 4);
 292
 293         if ((pt_version.rom_version != fw_version.rom_version) ||
 294                 (pt_version.build_version <= fw_version.build_version)) {
 295                 BT_ERR("Patch file version did not match with firmware");
 296                 release_firmware(firmware);
 297                 return -EINVAL;
 298         }
 299
 300         ret = ath3k_load_fwfile(udev, firmware);
 301         release_firmware(firmware);
 302
 303         return ret;
 304 }
 305
 306 static int ath3k_load_syscfg(struct usb_device *udev)
 307 {
 308         unsigned char fw_state;
 309         char filename[ATH3K_NAME_LEN] = {0};
 310         const struct firmware *firmware;
 311         struct ath3k_version fw_version;
 312         int clk_value, ret;
 313
 314         ret = ath3k_get_state(udev, &fw_state);
 315         if (ret < 0) {
 316                 BT_ERR("Can't get state to change to load configration err");
 317                 return -EBUSY;
 318         }
 319
 320         ret = ath3k_get_version(udev, &fw_version);
 321         if (ret < 0) {
 322                 BT_ERR("Can't get version to change to load ram patch err");
 323                 return ret;
 324         }
 325
 326         switch (fw_version.ref_clock) {
 327
 328         case ATH3K_XTAL_FREQ_26M:
 329                 clk_value = 26;
 330                 break;
 331         case ATH3K_XTAL_FREQ_40M:
 332                 clk_value = 40;
 333                 break;
 334         case ATH3K_XTAL_FREQ_19P2:
 335                 clk_value = 19;
 336                 break;
 337         default:
 338                 clk_value = 0;
 339                 break;
 340         }
 341
 342         snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
 343                 fw_version.rom_version, clk_value, ".dfu");
 344
 345         ret = request_firmware(&firmware, filename, &udev->dev);
 346         if (ret < 0) {
 347                 BT_ERR("Configuration file not found %s", filename);
 348                 return ret;
 349         }
 350
 351         ret = ath3k_load_fwfile(udev, firmware);
 352         release_firmware(firmware);
 353
 354         return ret;
 355 }
 356
 357 static int ath3k_probe(struct usb_interface *intf,
 358                         const struct usb_device_id *id)
 359 {
 360         const struct firmware *firmware;
 361         struct usb_device *udev = interface_to_usbdev(intf);
 362         int ret;
 363
 364         BT_DBG("intf %p id %p", intf, id);
 365
 366         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 367                 return -ENODEV;
 368
 369         /* match device ID in ath3k blacklist table */
 370         if (!id->driver_info) {
 371                 const struct usb_device_id *match;
 372                 match = usb_match_id(intf, ath3k_blist_tbl);
 373                 if (match)
 374                         id = match;
 375         }
 376
 377         /* load patch and sysconfig files for AR3012 */
 378         if (id->driver_info & BTUSB_ATH3012) {
 379
 380                 /* New firmware with patch and sysconfig files already loaded */
 381                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x0001)
 382                         return -ENODEV;
 383
 384                 ret = ath3k_load_patch(udev);
 385                 if (ret < 0) {
 386                         BT_ERR("Loading patch file failed");
 387                         return ret;
 388                 }
 389                 ret = ath3k_load_syscfg(udev);
 390                 if (ret < 0) {
 391                         BT_ERR("Loading sysconfig file failed");
 392                         return ret;
 393                 }
 394                 ret = ath3k_set_normal_mode(udev);
 395                 if (ret < 0) {
 396                         BT_ERR("Set normal mode failed");
 397                         return ret;
 398                 }
 399                 ath3k_switch_pid(udev);
 400                 return 0;
 401         }
 402
 403         if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
 404                 BT_ERR("Error loading firmware");
 405                 return -EIO;
 406         }
 407
 408         ret = ath3k_load_firmware(udev, firmware);
 409         release_firmware(firmware);
 410
 411         return ret;
 412 }
 413
 414 static void ath3k_disconnect(struct usb_interface *intf)
 415 {
 416         BT_DBG("ath3k_disconnect intf %p", intf);
 417 }
 418
 419 static struct usb_driver ath3k_driver = {
 420         .name           = "ath3k",
 421         .probe          = ath3k_probe,
 422         .disconnect     = ath3k_disconnect,
 423         .id_table       = ath3k_table,
 424 };
 425
 426 static int __init ath3k_init(void)
 427 {
 428         BT_INFO("Atheros AR30xx firmware driver ver %s", VERSION);
 429         return usb_register(&ath3k_driver);
 430 }
 431
 432 static void __exit ath3k_exit(void)
 433 {
 434         usb_deregister(&ath3k_driver);
 435 }
 436
 437 module_init(ath3k_init);
 438 module_exit(ath3k_exit);
 439
 440 MODULE_AUTHOR("Atheros Communications");
 441 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 442 MODULE_VERSION(VERSION);
 443 MODULE_LICENSE("GPL");
 444 MODULE_FIRMWARE("ath3k-1.fw");