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 static const struct {
 319         u16 subver;
 320         const char *name;
 321 } bcm_uart_subver_table[] = {
 322         { 0x4103, "BCM4330B1"   },      /* 002.001.003 */
 323         { 0x410e, "BCM43341B0"  },      /* 002.001.014 */
 324         { 0x4406, "BCM4324B3"   },      /* 002.004.006 */
 325         { 0x610c, "BCM4354"     },      /* 003.001.012 */
 326         { 0x2209, "BCM43430A1"  },      /* 001.002.009 */
 327         { 0x6119, "BCM4345C0"   },      /* 003.001.025 */
 328         { 0x230f, "BCM4356A2"   },      /* 001.003.015 */
 329         { }
 330 };
 331
 332 int btbcm_initialize(struct hci_dev *hdev, char *fw_name, size_t len)
 333 {
 334         u16 subver, rev;
 335         const char *hw_name = NULL;
 336         struct sk_buff *skb;
 337         struct hci_rp_read_local_version *ver;
 338         int i, err;
 339
 340         /* Reset */
 341         err = btbcm_reset(hdev);
 342         if (err)
 343                 return err;
 344
 345         /* Read Local Version Info */
 346         skb = btbcm_read_local_version(hdev);
 347         if (IS_ERR(skb))
 348                 return PTR_ERR(skb);
 349
 350         ver = (struct hci_rp_read_local_version *)skb->data;
 351         rev = le16_to_cpu(ver->hci_rev);
 352         subver = le16_to_cpu(ver->lmp_subver);
 353         kfree_skb(skb);
 354
 355         /* Read controller information */
 356         err = btbcm_read_info(hdev);
 357         if (err)
 358                 return err;
 359
 360         switch ((rev & 0xf000) >> 12) {
 361         case 0:
 362         case 1:
 363         case 2:
 364         case 3:
 365                 for (i = 0; bcm_uart_subver_table[i].name; i++) {
 366                         if (subver == bcm_uart_subver_table[i].subver) {
 367                                 hw_name = bcm_uart_subver_table[i].name;
 368                                 break;
 369                         }
 370                 }
 371
 372                 snprintf(fw_name, len, "brcm/%s.hcd", hw_name ? : "BCM");
 373                 break;
 374         default:
 375                 return 0;
 376         }
 377
 378         bt_dev_info(hdev, "%s (%3.3u.%3.3u.%3.3u) build %4.4u",
 379                     hw_name ? : "BCM", (subver & 0xe000) >> 13,
 380                     (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 381
 382         return 0;
 383 }
 384 EXPORT_SYMBOL_GPL(btbcm_initialize);
 385
 386 int btbcm_finalize(struct hci_dev *hdev)
 387 {
 388         struct sk_buff *skb;
 389         struct hci_rp_read_local_version *ver;
 390         u16 subver, rev;
 391         int err;
 392
 393         /* Reset */
 394         err = btbcm_reset(hdev);
 395         if (err)
 396                 return err;
 397
 398         /* Read Local Version Info */
 399         skb = btbcm_read_local_version(hdev);
 400         if (IS_ERR(skb))
 401                 return PTR_ERR(skb);
 402
 403         ver = (struct hci_rp_read_local_version *)skb->data;
 404         rev = le16_to_cpu(ver->hci_rev);
 405         subver = le16_to_cpu(ver->lmp_subver);
 406         kfree_skb(skb);
 407
 408         bt_dev_info(hdev, "BCM (%3.3u.%3.3u.%3.3u) build %4.4u",
 409                     (subver & 0xe000) >> 13, (subver & 0x1f00) >> 8,
 410                     (subver & 0x00ff), rev & 0x0fff);
 411
 412         btbcm_check_bdaddr(hdev);
 413
 414         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 415
 416         return 0;
 417 }
 418 EXPORT_SYMBOL_GPL(btbcm_finalize);
 419
 420 static const struct {
 421         u16 subver;
 422         const char *name;
 423 } bcm_usb_subver_table[] = {
 424         { 0x210b, "BCM43142A0"  },      /* 001.001.011 */
 425         { 0x2112, "BCM4314A0"   },      /* 001.001.018 */
 426         { 0x2118, "BCM20702A0"  },      /* 001.001.024 */
 427         { 0x2126, "BCM4335A0"   },      /* 001.001.038 */
 428         { 0x220e, "BCM20702A1"  },      /* 001.002.014 */
 429         { 0x230f, "BCM4354A2"   },      /* 001.003.015 */
 430         { 0x4106, "BCM4335B0"   },      /* 002.001.006 */
 431         { 0x410e, "BCM20702B0"  },      /* 002.001.014 */
 432         { 0x6109, "BCM4335C0"   },      /* 003.001.009 */
 433         { 0x610c, "BCM4354"     },      /* 003.001.012 */
 434         { }
 435 };
 436
 437 int btbcm_setup_patchram(struct hci_dev *hdev)
 438 {
 439         char fw_name[64];
 440         const struct firmware *fw;
 441         u16 subver, rev, pid, vid;
 442         const char *hw_name = NULL;
 443         struct sk_buff *skb;
 444         struct hci_rp_read_local_version *ver;
 445         int i, err;
 446
 447         /* Reset */
 448         err = btbcm_reset(hdev);
 449         if (err)
 450                 return err;
 451
 452         /* Read Local Version Info */
 453         skb = btbcm_read_local_version(hdev);
 454         if (IS_ERR(skb))
 455                 return PTR_ERR(skb);
 456
 457         ver = (struct hci_rp_read_local_version *)skb->data;
 458         rev = le16_to_cpu(ver->hci_rev);
 459         subver = le16_to_cpu(ver->lmp_subver);
 460         kfree_skb(skb);
 461
 462         /* Read controller information */
 463         err = btbcm_read_info(hdev);
 464         if (err)
 465                 return err;
 466
 467         switch ((rev & 0xf000) >> 12) {
 468         case 0:
 469         case 3:
 470                 for (i = 0; bcm_uart_subver_table[i].name; i++) {
 471                         if (subver == bcm_uart_subver_table[i].subver) {
 472                                 hw_name = bcm_uart_subver_table[i].name;
 473                                 break;
 474                         }
 475                 }
 476
 477                 snprintf(fw_name, sizeof(fw_name), "brcm/%s.hcd",
 478                          hw_name ? : "BCM");
 479                 break;
 480         case 1:
 481         case 2:
 482                 /* Read USB Product Info */
 483                 skb = btbcm_read_usb_product(hdev);
 484                 if (IS_ERR(skb))
 485                         return PTR_ERR(skb);
 486
 487                 vid = get_unaligned_le16(skb->data + 1);
 488                 pid = get_unaligned_le16(skb->data + 3);
 489                 kfree_skb(skb);
 490
 491                 for (i = 0; bcm_usb_subver_table[i].name; i++) {
 492                         if (subver == bcm_usb_subver_table[i].subver) {
 493                                 hw_name = bcm_usb_subver_table[i].name;
 494                                 break;
 495                         }
 496                 }
 497
 498                 snprintf(fw_name, sizeof(fw_name), "brcm/%s-%4.4x-%4.4x.hcd",
 499                          hw_name ? : "BCM", vid, pid);
 500                 break;
 501         default:
 502                 return 0;
 503         }
 504
 505         bt_dev_info(hdev, "%s (%3.3u.%3.3u.%3.3u) build %4.4u",
 506                     hw_name ? : "BCM", (subver & 0xe000) >> 13,
 507                     (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 508
 509         err = request_firmware(&fw, fw_name, &hdev->dev);
 510         if (err < 0) {
 511                 bt_dev_info(hdev, "BCM: Patch %s not found", fw_name);
 512                 goto done;
 513         }
 514
 515         btbcm_patchram(hdev, fw);
 516
 517         release_firmware(fw);
 518
 519         /* Reset */
 520         err = btbcm_reset(hdev);
 521         if (err)
 522                 return err;
 523
 524         /* Read Local Version Info */
 525         skb = btbcm_read_local_version(hdev);
 526         if (IS_ERR(skb))
 527                 return PTR_ERR(skb);
 528
 529         ver = (struct hci_rp_read_local_version *)skb->data;
 530         rev = le16_to_cpu(ver->hci_rev);
 531         subver = le16_to_cpu(ver->lmp_subver);
 532         kfree_skb(skb);
 533
 534         bt_dev_info(hdev, "%s (%3.3u.%3.3u.%3.3u) build %4.4u",
 535                     hw_name ? : "BCM", (subver & 0xe000) >> 13,
 536                     (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 537
 538         /* Read Local Name */
 539         skb = btbcm_read_local_name(hdev);
 540         if (IS_ERR(skb))
 541                 return PTR_ERR(skb);
 542
 543         bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
 544         kfree_skb(skb);
 545
 546 done:
 547         btbcm_check_bdaddr(hdev);
 548
 549         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 550
 551         return 0;
 552 }
 553 EXPORT_SYMBOL_GPL(btbcm_setup_patchram);
 554
 555 int btbcm_setup_apple(struct hci_dev *hdev)
 556 {
 557         struct sk_buff *skb;
 558         int err;
 559
 560         /* Reset */
 561         err = btbcm_reset(hdev);
 562         if (err)
 563                 return err;
 564
 565         /* Read Verbose Config Version Info */
 566         skb = btbcm_read_verbose_config(hdev);
 567         if (!IS_ERR(skb)) {
 568                 bt_dev_info(hdev, "BCM: chip id %u build %4.4u",
 569                             skb->data[1], get_unaligned_le16(skb->data + 5));
 570                 kfree_skb(skb);
 571         }
 572
 573         /* Read USB Product Info */
 574         skb = btbcm_read_usb_product(hdev);
 575         if (!IS_ERR(skb)) {
 576                 bt_dev_info(hdev, "BCM: product %4.4x:%4.4x",
 577                             get_unaligned_le16(skb->data + 1),
 578                             get_unaligned_le16(skb->data + 3));
 579                 kfree_skb(skb);
 580         }
 581
 582         /* Read Controller Features */
 583         skb = btbcm_read_controller_features(hdev);
 584         if (!IS_ERR(skb)) {
 585                 bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]);
 586                 kfree_skb(skb);
 587         }
 588
 589         /* Read Local Name */
 590         skb = btbcm_read_local_name(hdev);
 591         if (!IS_ERR(skb)) {
 592                 bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
 593                 kfree_skb(skb);
 594         }
 595
 596         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 597
 598         return 0;
 599 }
 600 EXPORT_SYMBOL_GPL(btbcm_setup_apple);
 601
 602 MODULE_AUTHOR("Marcel Holtmann <[email protected]>");
 603 MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
 604 MODULE_VERSION(VERSION);
 605 MODULE_LICENSE("GPL");