drivers/bluetooth/btbcm.c

   1 /*
   2  *
   3  *  Bluetooth support for Broadcom devices
   4  *
   5  *  Copyright (C) 2015  Intel Corporation
   6  *
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/firmware.h>
  26 #include <asm/unaligned.h>
  27
  28 #include <net/bluetooth/bluetooth.h>
  29 #include <net/bluetooth/hci_core.h>
  30
  31 #include "btbcm.h"
  32
  33 #define VERSION "0.1"
  34
  35 #define BDADDR_BCM20702A0 (&(bdaddr_t) {{0x00, 0xa0, 0x02, 0x70, 0x20, 0x00}})
  36 #define BDADDR_BCM4324B3 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb3, 0x24, 0x43}})
  37 #define BDADDR_BCM4330B1 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb1, 0x30, 0x43}})
  38
  39 int btbcm_check_bdaddr(struct hci_dev *hdev)
  40 {
  41         struct hci_rp_read_bd_addr *bda;
  42         struct sk_buff *skb;
  43
  44         skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
  45                              HCI_INIT_TIMEOUT);
  46         if (IS_ERR(skb)) {
  47                 int err = PTR_ERR(skb);
  48                 bt_dev_err(hdev, "BCM: Reading device address failed (%d)", err);
  49                 return err;
  50         }
  51
  52         if (skb->len != sizeof(*bda)) {
  53                 bt_dev_err(hdev, "BCM: Device address length mismatch");
  54                 kfree_skb(skb);
  55                 return -EIO;
  56         }
  57
  58         bda = (struct hci_rp_read_bd_addr *)skb->data;
  59
  60         /* Check if the address indicates a controller with either an
  61          * invalid or default address. In both cases the device needs
  62          * to be marked as not having a valid address.
  63          *
  64          * The address 00:20:70:02:A0:00 indicates a BCM20702A0 controller
  65          * with no configured address.
  66          *
  67          * The address 43:24:B3:00:00:00 indicates a BCM4324B3 controller
  68          * with waiting for configuration state.
  69          *
  70          * The address 43:30:B1:00:00:00 indicates a BCM4330B1 controller
  71          * with waiting for configuration state.
  72          */
  73         if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0) ||
  74             !bacmp(&bda->bdaddr, BDADDR_BCM4324B3) ||
  75             !bacmp(&bda->bdaddr, BDADDR_BCM4330B1)) {
  76                 bt_dev_info(hdev, "BCM: Using default device address (%pMR)",
  77                             &bda->bdaddr);
  78                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
  79         }
  80
  81         kfree_skb(skb);
  82
  83         return 0;
  84 }
  85 EXPORT_SYMBOL_GPL(btbcm_check_bdaddr);
  86
  87 int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
  88 {
  89         struct sk_buff *skb;
  90         int err;
  91
  92         skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
  93         if (IS_ERR(skb)) {
  94                 err = PTR_ERR(skb);
  95                 bt_dev_err(hdev, "BCM: Change address command failed (%d)", err);
  96                 return err;
  97         }
  98         kfree_skb(skb);
  99
 100         return 0;
 101 }
 102 EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);
 103
 104 int btbcm_patchram(struct hci_dev *hdev, const struct firmware *fw)
 105 {
 106         const struct hci_command_hdr *cmd;
 107         const u8 *fw_ptr;
 108         size_t fw_size;
 109         struct sk_buff *skb;
 110         u16 opcode;
 111         int err = 0;
 112
 113         /* Start Download */
 114         skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);
 115         if (IS_ERR(skb)) {
 116                 err = PTR_ERR(skb);
 117                 bt_dev_err(hdev, "BCM: Download Minidrv command failed (%d)",
 118                            err);
 119                 goto done;
 120         }
 121         kfree_skb(skb);
 122
 123         /* 50 msec delay after Download Minidrv completes */
 124         msleep(50);
 125
 126         fw_ptr = fw->data;
 127         fw_size = fw->size;
 128
 129         while (fw_size >= sizeof(*cmd)) {
 130                 const u8 *cmd_param;
 131
 132                 cmd = (struct hci_command_hdr *)fw_ptr;
 133                 fw_ptr += sizeof(*cmd);
 134                 fw_size -= sizeof(*cmd);
 135
 136                 if (fw_size < cmd->plen) {
 137                         bt_dev_err(hdev, "BCM: Patch is corrupted");
 138                         err = -EINVAL;
 139                         goto done;
 140                 }
 141
 142                 cmd_param = fw_ptr;
 143                 fw_ptr += cmd->plen;
 144                 fw_size -= cmd->plen;
 145
 146                 opcode = le16_to_cpu(cmd->opcode);
 147
 148                 skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,
 149                                      HCI_INIT_TIMEOUT);
 150                 if (IS_ERR(skb)) {
 151                         err = PTR_ERR(skb);
 152                         bt_dev_err(hdev, "BCM: Patch command %04x failed (%d)",
 153                                    opcode, err);
 154                         goto done;
 155                 }
 156                 kfree_skb(skb);
 157         }
 158
 159         /* 250 msec delay after Launch Ram completes */
 160         msleep(250);
 161
 162 done:
 163         return err;
 164 }
 165 EXPORT_SYMBOL(btbcm_patchram);
 166
 167 static int btbcm_reset(struct hci_dev *hdev)
 168 {
 169         struct sk_buff *skb;
 170
 171         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 172         if (IS_ERR(skb)) {
 173                 int err = PTR_ERR(skb);
 174                 bt_dev_err(hdev, "BCM: Reset failed (%d)", err);
 175                 return err;
 176         }
 177         kfree_skb(skb);
 178
 179         /* 100 msec delay for module to complete reset process */
 180         msleep(100);
 181
 182         return 0;
 183 }
 184
 185 static struct sk_buff *btbcm_read_local_name(struct hci_dev *hdev)
 186 {
 187         struct sk_buff *skb;
 188
 189         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL,
 190                              HCI_INIT_TIMEOUT);
 191         if (IS_ERR(skb)) {
 192                 bt_dev_err(hdev, "BCM: Reading local name failed (%ld)",
 193                            PTR_ERR(skb));
 194                 return skb;
 195         }
 196
 197         if (skb->len != sizeof(struct hci_rp_read_local_name)) {
 198                 bt_dev_err(hdev, "BCM: Local name length mismatch");
 199                 kfree_skb(skb);
 200                 return ERR_PTR(-EIO);
 201         }
 202
 203         return skb;
 204 }
 205
 206 static struct sk_buff *btbcm_read_local_version(struct hci_dev *hdev)
 207 {
 208         struct sk_buff *skb;
 209
 210         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
 211                              HCI_INIT_TIMEOUT);
 212         if (IS_ERR(skb)) {
 213                 bt_dev_err(hdev, "BCM: Reading local version info failed (%ld)",
 214                            PTR_ERR(skb));
 215                 return skb;
 216         }
 217
 218         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
 219                 bt_dev_err(hdev, "BCM: Local version length mismatch");
 220                 kfree_skb(skb);
 221                 return ERR_PTR(-EIO);
 222         }
 223
 224         return skb;
 225 }
 226
 227 static struct sk_buff *btbcm_read_verbose_config(struct hci_dev *hdev)
 228 {
 229         struct sk_buff *skb;
 230
 231         skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);
 232         if (IS_ERR(skb)) {
 233                 bt_dev_err(hdev, "BCM: Read verbose config info failed (%ld)",
 234                            PTR_ERR(skb));
 235                 return skb;
 236         }
 237
 238         if (skb->len != 7) {
 239                 bt_dev_err(hdev, "BCM: Verbose config length mismatch");
 240                 kfree_skb(skb);
 241                 return ERR_PTR(-EIO);
 242         }
 243
 244         return skb;
 245 }
 246
 247 static struct sk_buff *btbcm_read_controller_features(struct hci_dev *hdev)
 248 {
 249         struct sk_buff *skb;
 250
 251         skb = __hci_cmd_sync(hdev, 0xfc6e, 0, NULL, HCI_INIT_TIMEOUT);
 252         if (IS_ERR(skb)) {
 253                 bt_dev_err(hdev, "BCM: Read controller features failed (%ld)",
 254                            PTR_ERR(skb));
 255                 return skb;
 256         }
 257
 258         if (skb->len != 9) {
 259                 bt_dev_err(hdev, "BCM: Controller features length mismatch");
 260                 kfree_skb(skb);
 261                 return ERR_PTR(-EIO);
 262         }
 263
 264         return skb;
 265 }
 266
 267 static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev)
 268 {
 269         struct sk_buff *skb;
 270
 271         skb = __hci_cmd_sync(hdev, 0xfc5a, 0, NULL, HCI_INIT_TIMEOUT);
 272         if (IS_ERR(skb)) {
 273                 bt_dev_err(hdev, "BCM: Read USB product info failed (%ld)",
 274                            PTR_ERR(skb));
 275                 return skb;
 276         }
 277
 278         if (skb->len != 5) {
 279                 bt_dev_err(hdev, "BCM: USB product length mismatch");
 280                 kfree_skb(skb);
 281                 return ERR_PTR(-EIO);
 282         }
 283
 284         return skb;
 285 }
 286
 287 static int btbcm_read_info(struct hci_dev *hdev)
 288 {
 289         struct sk_buff *skb;
 290
 291         /* Read Verbose Config Version Info */
 292         skb = btbcm_read_verbose_config(hdev);
 293         if (IS_ERR(skb))
 294                 return PTR_ERR(skb);
 295
 296         bt_dev_info(hdev, "BCM: chip id %u", skb->data[1]);
 297         kfree_skb(skb);
 298
 299         /* Read Controller Features */
 300         skb = btbcm_read_controller_features(hdev);
 301         if (IS_ERR(skb))
 302                 return PTR_ERR(skb);
 303
 304         bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]);
 305         kfree_skb(skb);
 306
 307         /* Read Local Name */
 308         skb = btbcm_read_local_name(hdev);
 309         if (IS_ERR(skb))
 310                 return PTR_ERR(skb);
 311
 312         bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
 313         kfree_skb(skb);
 314
 315         return 0;
 316 }
 317
 318 struct bcm_subver_table {
 319         u16 subver;
 320         const char *name;
 321 };
 322
 323 static const struct bcm_subver_table bcm_uart_subver_table[] = {
 324         { 0x4103, "BCM4330B1"   },      /* 002.001.003 */
 325         { 0x410e, "BCM43341B0"  },      /* 002.001.014 */
 326         { 0x4406, "BCM4324B3"   },      /* 002.004.006 */
 327         { 0x6109, "BCM4335C0"   },      /* 003.001.009 */
 328         { 0x610c, "BCM4354"     },      /* 003.001.012 */
 329         { 0x2122, "BCM4343A0"   },      /* 001.001.034 */
 330         { 0x2209, "BCM43430A1"  },      /* 001.002.009 */
 331         { 0x6119, "BCM4345C0"   },      /* 003.001.025 */
 332         { 0x230f, "BCM4356A2"   },      /* 001.003.015 */
 333         { }
 334 };
 335
 336 static const struct bcm_subver_table bcm_usb_subver_table[] = {
 337         { 0x210b, "BCM43142A0"  },      /* 001.001.011 */
 338         { 0x2112, "BCM4314A0"   },      /* 001.001.018 */
 339         { 0x2118, "BCM20702A0"  },      /* 001.001.024 */
 340         { 0x2126, "BCM4335A0"   },      /* 001.001.038 */
 341         { 0x220e, "BCM20702A1"  },      /* 001.002.014 */
 342         { 0x230f, "BCM4354A2"   },      /* 001.003.015 */
 343         { 0x4106, "BCM4335B0"   },      /* 002.001.006 */
 344         { 0x410e, "BCM20702B0"  },      /* 002.001.014 */
 345         { 0x6109, "BCM4335C0"   },      /* 003.001.009 */
 346         { 0x610c, "BCM4354"     },      /* 003.001.012 */
 347         { }
 348 };
 349
 350 int btbcm_initialize(struct hci_dev *hdev, char *fw_name, size_t len,
 351                      bool reinit)
 352 {
 353         u16 subver, rev, pid, vid;
 354         const char *hw_name = "BCM";
 355         struct sk_buff *skb;
 356         struct hci_rp_read_local_version *ver;
 357         const struct bcm_subver_table *bcm_subver_table;
 358         int i, err;
 359
 360         /* Reset */
 361         err = btbcm_reset(hdev);
 362         if (err)
 363                 return err;
 364
 365         /* Read Local Version Info */
 366         skb = btbcm_read_local_version(hdev);
 367         if (IS_ERR(skb))
 368                 return PTR_ERR(skb);
 369
 370         ver = (struct hci_rp_read_local_version *)skb->data;
 371         rev = le16_to_cpu(ver->hci_rev);
 372         subver = le16_to_cpu(ver->lmp_subver);
 373         kfree_skb(skb);
 374
 375         /* Read controller information */
 376         if (!reinit) {
 377                 err = btbcm_read_info(hdev);
 378                 if (err)
 379                         return err;
 380         }
 381
 382         /* Upper nibble of rev should be between 0 and 3? */
 383         if (((rev & 0xf000) >> 12) > 3)
 384                 return 0;
 385
 386         bcm_subver_table = (hdev->bus == HCI_USB) ? bcm_usb_subver_table :
 387                                                     bcm_uart_subver_table;
 388
 389         for (i = 0; bcm_subver_table[i].name; i++) {
 390                 if (subver == bcm_subver_table[i].subver) {
 391                         hw_name = bcm_subver_table[i].name;
 392                         break;
 393                 }
 394         }
 395
 396         if (hdev->bus == HCI_USB) {
 397                 /* Read USB Product Info */
 398                 skb = btbcm_read_usb_product(hdev);
 399                 if (IS_ERR(skb))
 400                         return PTR_ERR(skb);
 401
 402                 vid = get_unaligned_le16(skb->data + 1);
 403                 pid = get_unaligned_le16(skb->data + 3);
 404                 kfree_skb(skb);
 405
 406                 snprintf(fw_name, len, "brcm/%s-%4.4x-%4.4x.hcd",
 407                          hw_name, vid, pid);
 408         } else {
 409                 snprintf(fw_name, len, "brcm/%s.hcd", hw_name);
 410         }
 411
 412         bt_dev_info(hdev, "%s (%3.3u.%3.3u.%3.3u) build %4.4u",
 413                     hw_name, (subver & 0xe000) >> 13,
 414                     (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 415
 416         return 0;
 417 }
 418 EXPORT_SYMBOL_GPL(btbcm_initialize);
 419
 420 int btbcm_finalize(struct hci_dev *hdev)
 421 {
 422         char fw_name[64];
 423         int err;
 424
 425         /* Re-initialize */
 426         err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), true);
 427         if (err)
 428                 return err;
 429
 430         btbcm_check_bdaddr(hdev);
 431
 432         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 433
 434         return 0;
 435 }
 436 EXPORT_SYMBOL_GPL(btbcm_finalize);
 437
 438 int btbcm_setup_patchram(struct hci_dev *hdev)
 439 {
 440         char fw_name[64];
 441         const struct firmware *fw;
 442         struct sk_buff *skb;
 443         int err;
 444
 445         /* Initialize */
 446         err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), false);
 447         if (err)
 448                 return err;
 449
 450         err = request_firmware(&fw, fw_name, &hdev->dev);
 451         if (err < 0) {
 452                 bt_dev_info(hdev, "BCM: Patch %s not found", fw_name);
 453                 goto done;
 454         }
 455
 456         btbcm_patchram(hdev, fw);
 457
 458         release_firmware(fw);
 459
 460         /* Re-initialize */
 461         err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), true);
 462         if (err)
 463                 return err;
 464
 465         /* Read Local Name */
 466         skb = btbcm_read_local_name(hdev);
 467         if (IS_ERR(skb))
 468                 return PTR_ERR(skb);
 469
 470         bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
 471         kfree_skb(skb);
 472
 473 done:
 474         btbcm_check_bdaddr(hdev);
 475
 476         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 477
 478         return 0;
 479 }
 480 EXPORT_SYMBOL_GPL(btbcm_setup_patchram);
 481
 482 int btbcm_setup_apple(struct hci_dev *hdev)
 483 {
 484         struct sk_buff *skb;
 485         int err;
 486
 487         /* Reset */
 488         err = btbcm_reset(hdev);
 489         if (err)
 490                 return err;
 491
 492         /* Read Verbose Config Version Info */
 493         skb = btbcm_read_verbose_config(hdev);
 494         if (!IS_ERR(skb)) {
 495                 bt_dev_info(hdev, "BCM: chip id %u build %4.4u",
 496                             skb->data[1], get_unaligned_le16(skb->data + 5));
 497                 kfree_skb(skb);
 498         }
 499
 500         /* Read USB Product Info */
 501         skb = btbcm_read_usb_product(hdev);
 502         if (!IS_ERR(skb)) {
 503                 bt_dev_info(hdev, "BCM: product %4.4x:%4.4x",
 504                             get_unaligned_le16(skb->data + 1),
 505                             get_unaligned_le16(skb->data + 3));
 506                 kfree_skb(skb);
 507         }
 508
 509         /* Read Controller Features */
 510         skb = btbcm_read_controller_features(hdev);
 511         if (!IS_ERR(skb)) {
 512                 bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]);
 513                 kfree_skb(skb);
 514         }
 515
 516         /* Read Local Name */
 517         skb = btbcm_read_local_name(hdev);
 518         if (!IS_ERR(skb)) {
 519                 bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
 520                 kfree_skb(skb);
 521         }
 522
 523         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 524
 525         return 0;
 526 }
 527 EXPORT_SYMBOL_GPL(btbcm_setup_apple);
 528
 529 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 530 MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
 531 MODULE_VERSION(VERSION);
 532 MODULE_LICENSE("GPL");