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_ERR("%s: BCM: Reading device address failed (%d)",
  49                        hdev->name, err);
  50                 return err;
  51         }
  52
  53         if (skb->len != sizeof(*bda)) {
  54                 BT_ERR("%s: BCM: Device address length mismatch", hdev->name);
  55                 kfree_skb(skb);
  56                 return -EIO;
  57         }
  58
  59         bda = (struct hci_rp_read_bd_addr *)skb->data;
  60
  61         /* Check if the address indicates a controller with either an
  62          * invalid or default address. In both cases the device needs
  63          * to be marked as not having a valid address.
  64          *
  65          * The address 00:20:70:02:A0:00 indicates a BCM20702A0 controller
  66          * with no configured address.
  67          *
  68          * The address 43:24:B3:00:00:00 indicates a BCM4324B3 controller
  69          * with waiting for configuration state.
  70          *
  71          * The address 43:30:B1:00:00:00 indicates a BCM4330B1 controller
  72          * with waiting for configuration state.
  73          */
  74         if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0) ||
  75             !bacmp(&bda->bdaddr, BDADDR_BCM4324B3) ||
  76             !bacmp(&bda->bdaddr, BDADDR_BCM4330B1)) {
  77                 BT_INFO("%s: BCM: Using default device address (%pMR)",
  78                         hdev->name, &bda->bdaddr);
  79                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
  80         }
  81
  82         kfree_skb(skb);
  83
  84         return 0;
  85 }
  86 EXPORT_SYMBOL_GPL(btbcm_check_bdaddr);
  87
  88 int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
  89 {
  90         struct sk_buff *skb;
  91         int err;
  92
  93         skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
  94         if (IS_ERR(skb)) {
  95                 err = PTR_ERR(skb);
  96                 BT_ERR("%s: BCM: Change address command failed (%d)",
  97                        hdev->name, err);
  98                 return err;
  99         }
 100         kfree_skb(skb);
 101
 102         return 0;
 103 }
 104 EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);
 105
 106 int btbcm_patchram(struct hci_dev *hdev, const struct firmware *fw)
 107 {
 108         const struct hci_command_hdr *cmd;
 109         const u8 *fw_ptr;
 110         size_t fw_size;
 111         struct sk_buff *skb;
 112         u16 opcode;
 113         int err = 0;
 114
 115         /* Start Download */
 116         skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);
 117         if (IS_ERR(skb)) {
 118                 err = PTR_ERR(skb);
 119                 BT_ERR("%s: BCM: Download Minidrv command failed (%d)",
 120                        hdev->name, err);
 121                 goto done;
 122         }
 123         kfree_skb(skb);
 124
 125         /* 50 msec delay after Download Minidrv completes */
 126         msleep(50);
 127
 128         fw_ptr = fw->data;
 129         fw_size = fw->size;
 130
 131         while (fw_size >= sizeof(*cmd)) {
 132                 const u8 *cmd_param;
 133
 134                 cmd = (struct hci_command_hdr *)fw_ptr;
 135                 fw_ptr += sizeof(*cmd);
 136                 fw_size -= sizeof(*cmd);
 137
 138                 if (fw_size < cmd->plen) {
 139                         BT_ERR("%s: BCM: Patch is corrupted", hdev->name);
 140                         err = -EINVAL;
 141                         goto done;
 142                 }
 143
 144                 cmd_param = fw_ptr;
 145                 fw_ptr += cmd->plen;
 146                 fw_size -= cmd->plen;
 147
 148                 opcode = le16_to_cpu(cmd->opcode);
 149
 150                 skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,
 151                                      HCI_INIT_TIMEOUT);
 152                 if (IS_ERR(skb)) {
 153                         err = PTR_ERR(skb);
 154                         BT_ERR("%s: BCM: Patch command %04x failed (%d)",
 155                                hdev->name, opcode, err);
 156                         goto done;
 157                 }
 158                 kfree_skb(skb);
 159         }
 160
 161         /* 250 msec delay after Launch Ram completes */
 162         msleep(250);
 163
 164 done:
 165         return err;
 166 }
 167 EXPORT_SYMBOL(btbcm_patchram);
 168
 169 static int btbcm_reset(struct hci_dev *hdev)
 170 {
 171         struct sk_buff *skb;
 172
 173         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 174         if (IS_ERR(skb)) {
 175                 int err = PTR_ERR(skb);
 176                 BT_ERR("%s: BCM: Reset failed (%d)", hdev->name, err);
 177                 return err;
 178         }
 179         kfree_skb(skb);
 180
 181         return 0;
 182 }
 183
 184 static struct sk_buff *btbcm_read_local_name(struct hci_dev *hdev)
 185 {
 186         struct sk_buff *skb;
 187
 188         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL,
 189                              HCI_INIT_TIMEOUT);
 190         if (IS_ERR(skb)) {
 191                 BT_ERR("%s: BCM: Reading local name failed (%ld)",
 192                        hdev->name, PTR_ERR(skb));
 193                 return skb;
 194         }
 195
 196         if (skb->len != sizeof(struct hci_rp_read_local_name)) {
 197                 BT_ERR("%s: BCM: Local name length mismatch", hdev->name);
 198                 kfree_skb(skb);
 199                 return ERR_PTR(-EIO);
 200         }
 201
 202         return skb;
 203 }
 204
 205 static struct sk_buff *btbcm_read_local_version(struct hci_dev *hdev)
 206 {
 207         struct sk_buff *skb;
 208
 209         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
 210                              HCI_INIT_TIMEOUT);
 211         if (IS_ERR(skb)) {
 212                 BT_ERR("%s: BCM: Reading local version info failed (%ld)",
 213                        hdev->name, PTR_ERR(skb));
 214                 return skb;
 215         }
 216
 217         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
 218                 BT_ERR("%s: BCM: Local version length mismatch", hdev->name);
 219                 kfree_skb(skb);
 220                 return ERR_PTR(-EIO);
 221         }
 222
 223         return skb;
 224 }
 225
 226 static struct sk_buff *btbcm_read_verbose_config(struct hci_dev *hdev)
 227 {
 228         struct sk_buff *skb;
 229
 230         skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);
 231         if (IS_ERR(skb)) {
 232                 BT_ERR("%s: BCM: Read verbose config info failed (%ld)",
 233                        hdev->name, PTR_ERR(skb));
 234                 return skb;
 235         }
 236
 237         if (skb->len != 7) {
 238                 BT_ERR("%s: BCM: Verbose config length mismatch", hdev->name);
 239                 kfree_skb(skb);
 240                 return ERR_PTR(-EIO);
 241         }
 242
 243         return skb;
 244 }
 245
 246 static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev)
 247 {
 248         struct sk_buff *skb;
 249
 250         skb = __hci_cmd_sync(hdev, 0xfc5a, 0, NULL, HCI_INIT_TIMEOUT);
 251         if (IS_ERR(skb)) {
 252                 BT_ERR("%s: BCM: Read USB product info failed (%ld)",
 253                        hdev->name, PTR_ERR(skb));
 254                 return skb;
 255         }
 256
 257         if (skb->len != 5) {
 258                 BT_ERR("%s: BCM: USB product length mismatch", hdev->name);
 259                 kfree_skb(skb);
 260                 return ERR_PTR(-EIO);
 261         }
 262
 263         return skb;
 264 }
 265
 266 static const struct {
 267         u16 subver;
 268         const char *name;
 269 } bcm_uart_subver_table[] = {
 270         { 0x4103, "BCM4330B1"   },      /* 002.001.003 */
 271         { 0x410e, "BCM43341B0"  },      /* 002.001.014 */
 272         { 0x4406, "BCM4324B3"   },      /* 002.004.006 */
 273         { 0x610c, "BCM4354"     },      /* 003.001.012 */
 274         { }
 275 };
 276
 277 int btbcm_initialize(struct hci_dev *hdev, char *fw_name, size_t len)
 278 {
 279         u16 subver, rev;
 280         const char *hw_name = NULL;
 281         struct sk_buff *skb;
 282         struct hci_rp_read_local_version *ver;
 283         int i, err;
 284
 285         /* Reset */
 286         err = btbcm_reset(hdev);
 287         if (err)
 288                 return err;
 289
 290         /* Read Local Version Info */
 291         skb = btbcm_read_local_version(hdev);
 292         if (IS_ERR(skb))
 293                 return PTR_ERR(skb);
 294
 295         ver = (struct hci_rp_read_local_version *)skb->data;
 296         rev = le16_to_cpu(ver->hci_rev);
 297         subver = le16_to_cpu(ver->lmp_subver);
 298         kfree_skb(skb);
 299
 300         /* Read Verbose Config Version Info */
 301         skb = btbcm_read_verbose_config(hdev);
 302         if (IS_ERR(skb))
 303                 return PTR_ERR(skb);
 304
 305         BT_INFO("%s: BCM: chip id %u", hdev->name, skb->data[1]);
 306         kfree_skb(skb);
 307
 308         switch ((rev & 0xf000) >> 12) {
 309         case 0:
 310         case 1:
 311         case 3:
 312                 for (i = 0; bcm_uart_subver_table[i].name; i++) {
 313                         if (subver == bcm_uart_subver_table[i].subver) {
 314                                 hw_name = bcm_uart_subver_table[i].name;
 315                                 break;
 316                         }
 317                 }
 318
 319                 snprintf(fw_name, len, "brcm/%s.hcd", hw_name ? : "BCM");
 320                 break;
 321         default:
 322                 return 0;
 323         }
 324
 325         BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 326                 hw_name ? : "BCM", (subver & 0xe000) >> 13,
 327                 (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 328
 329         return 0;
 330 }
 331 EXPORT_SYMBOL_GPL(btbcm_initialize);
 332
 333 int btbcm_finalize(struct hci_dev *hdev)
 334 {
 335         struct sk_buff *skb;
 336         struct hci_rp_read_local_version *ver;
 337         u16 subver, rev;
 338         int 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         BT_INFO("%s: BCM (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 356                 (subver & 0xe000) >> 13, (subver & 0x1f00) >> 8,
 357                 (subver & 0x00ff), rev & 0x0fff);
 358
 359         btbcm_check_bdaddr(hdev);
 360
 361         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 362
 363         return 0;
 364 }
 365 EXPORT_SYMBOL_GPL(btbcm_finalize);
 366
 367 static const struct {
 368         u16 subver;
 369         const char *name;
 370 } bcm_usb_subver_table[] = {
 371         { 0x210b, "BCM43142A0"  },      /* 001.001.011 */
 372         { 0x2112, "BCM4314A0"   },      /* 001.001.018 */
 373         { 0x2118, "BCM20702A0"  },      /* 001.001.024 */
 374         { 0x2126, "BCM4335A0"   },      /* 001.001.038 */
 375         { 0x220e, "BCM20702A1"  },      /* 001.002.014 */
 376         { 0x230f, "BCM4354A2"   },      /* 001.003.015 */
 377         { 0x4106, "BCM4335B0"   },      /* 002.001.006 */
 378         { 0x410e, "BCM20702B0"  },      /* 002.001.014 */
 379         { 0x6109, "BCM4335C0"   },      /* 003.001.009 */
 380         { 0x610c, "BCM4354"     },      /* 003.001.012 */
 381         { }
 382 };
 383
 384 int btbcm_setup_patchram(struct hci_dev *hdev)
 385 {
 386         char fw_name[64];
 387         const struct firmware *fw;
 388         u16 subver, rev, pid, vid;
 389         const char *hw_name = NULL;
 390         struct sk_buff *skb;
 391         struct hci_rp_read_local_version *ver;
 392         int i, err;
 393
 394         /* Reset */
 395         err = btbcm_reset(hdev);
 396         if (err)
 397                 return err;
 398
 399         /* Read Local Version Info */
 400         skb = btbcm_read_local_version(hdev);
 401         if (IS_ERR(skb))
 402                 return PTR_ERR(skb);
 403
 404         ver = (struct hci_rp_read_local_version *)skb->data;
 405         rev = le16_to_cpu(ver->hci_rev);
 406         subver = le16_to_cpu(ver->lmp_subver);
 407         kfree_skb(skb);
 408
 409         /* Read Verbose Config Version Info */
 410         skb = btbcm_read_verbose_config(hdev);
 411         if (IS_ERR(skb))
 412                 return PTR_ERR(skb);
 413
 414         BT_INFO("%s: BCM: chip id %u", hdev->name, skb->data[1]);
 415         kfree_skb(skb);
 416
 417         /* Read Local Name */
 418         skb = btbcm_read_local_name(hdev);
 419         if (IS_ERR(skb))
 420                 return PTR_ERR(skb);
 421
 422         BT_INFO("%s: %s", hdev->name, (char *)(skb->data + 1));
 423         kfree_skb(skb);
 424
 425         switch ((rev & 0xf000) >> 12) {
 426         case 0:
 427         case 3:
 428                 for (i = 0; bcm_uart_subver_table[i].name; i++) {
 429                         if (subver == bcm_uart_subver_table[i].subver) {
 430                                 hw_name = bcm_uart_subver_table[i].name;
 431                                 break;
 432                         }
 433                 }
 434
 435                 snprintf(fw_name, sizeof(fw_name), "brcm/%s.hcd",
 436                          hw_name ? : "BCM");
 437                 break;
 438         case 1:
 439         case 2:
 440                 /* Read USB Product Info */
 441                 skb = btbcm_read_usb_product(hdev);
 442                 if (IS_ERR(skb))
 443                         return PTR_ERR(skb);
 444
 445                 vid = get_unaligned_le16(skb->data + 1);
 446                 pid = get_unaligned_le16(skb->data + 3);
 447                 kfree_skb(skb);
 448
 449                 for (i = 0; bcm_usb_subver_table[i].name; i++) {
 450                         if (subver == bcm_usb_subver_table[i].subver) {
 451                                 hw_name = bcm_usb_subver_table[i].name;
 452                                 break;
 453                         }
 454                 }
 455
 456                 snprintf(fw_name, sizeof(fw_name), "brcm/%s-%4.4x-%4.4x.hcd",
 457                          hw_name ? : "BCM", vid, pid);
 458                 break;
 459         default:
 460                 return 0;
 461         }
 462
 463         BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 464                 hw_name ? : "BCM", (subver & 0xe000) >> 13,
 465                 (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 466
 467         err = request_firmware(&fw, fw_name, &hdev->dev);
 468         if (err < 0) {
 469                 BT_INFO("%s: BCM: Patch %s not found", hdev->name, fw_name);
 470                 return 0;
 471         }
 472
 473         btbcm_patchram(hdev, fw);
 474
 475         release_firmware(fw);
 476
 477         /* Reset */
 478         err = btbcm_reset(hdev);
 479         if (err)
 480                 return err;
 481
 482         /* Read Local Version Info */
 483         skb = btbcm_read_local_version(hdev);
 484         if (IS_ERR(skb))
 485                 return PTR_ERR(skb);
 486
 487         ver = (struct hci_rp_read_local_version *)skb->data;
 488         rev = le16_to_cpu(ver->hci_rev);
 489         subver = le16_to_cpu(ver->lmp_subver);
 490         kfree_skb(skb);
 491
 492         BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 493                 hw_name ? : "BCM", (subver & 0xe000) >> 13,
 494                 (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 495
 496         /* Read Local Name */
 497         skb = btbcm_read_local_name(hdev);
 498         if (IS_ERR(skb))
 499                 return PTR_ERR(skb);
 500
 501         BT_INFO("%s: %s", hdev->name, (char *)(skb->data + 1));
 502         kfree_skb(skb);
 503
 504         btbcm_check_bdaddr(hdev);
 505
 506         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 507
 508         return 0;
 509 }
 510 EXPORT_SYMBOL_GPL(btbcm_setup_patchram);
 511
 512 int btbcm_setup_apple(struct hci_dev *hdev)
 513 {
 514         struct sk_buff *skb;
 515         int err;
 516
 517         /* Reset */
 518         err = btbcm_reset(hdev);
 519         if (err)
 520                 return err;
 521
 522         /* Read Verbose Config Version Info */
 523         skb = btbcm_read_verbose_config(hdev);
 524         if (!IS_ERR(skb)) {
 525                 BT_INFO("%s: BCM: chip id %u build %4.4u", hdev->name,
 526                         skb->data[1], get_unaligned_le16(skb->data + 5));
 527                 kfree_skb(skb);
 528         }
 529
 530         /* Read USB Product Info */
 531         skb = btbcm_read_usb_product(hdev);
 532         if (!IS_ERR(skb)) {
 533                 BT_INFO("%s: BCM: product %4.4x:%4.4x", hdev->name,
 534                         get_unaligned_le16(skb->data + 1),
 535                         get_unaligned_le16(skb->data + 3));
 536                 kfree_skb(skb);
 537         }
 538
 539         /* Read Local Name */
 540         skb = btbcm_read_local_name(hdev);
 541         if (!IS_ERR(skb)) {
 542                 BT_INFO("%s: %s", hdev->name, (char *)(skb->data + 1));
 543                 kfree_skb(skb);
 544         }
 545
 546         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 547
 548         return 0;
 549 }
 550 EXPORT_SYMBOL_GPL(btbcm_setup_apple);
 551
 552 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 553 MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
 554 MODULE_VERSION(VERSION);
 555 MODULE_LICENSE("GPL");