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
  38 int btbcm_check_bdaddr(struct hci_dev *hdev)
  39 {
  40         struct hci_rp_read_bd_addr *bda;
  41         struct sk_buff *skb;
  42
  43         skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
  44                              HCI_INIT_TIMEOUT);
  45         if (IS_ERR(skb)) {
  46                 int err = PTR_ERR(skb);
  47                 BT_ERR("%s: BCM: Reading device address failed (%d)",
  48                        hdev->name, err);
  49                 return err;
  50         }
  51
  52         if (skb->len != sizeof(*bda)) {
  53                 BT_ERR("%s: BCM: Device address length mismatch", hdev->name);
  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         if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0) ||
  71             !bacmp(&bda->bdaddr, BDADDR_BCM4324B3)) {
  72                 BT_INFO("%s: BCM: Using default device address (%pMR)",
  73                         hdev->name, &bda->bdaddr);
  74                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
  75         }
  76
  77         kfree_skb(skb);
  78
  79         return 0;
  80 }
  81 EXPORT_SYMBOL_GPL(btbcm_check_bdaddr);
  82
  83 int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
  84 {
  85         struct sk_buff *skb;
  86         int err;
  87
  88         skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
  89         if (IS_ERR(skb)) {
  90                 err = PTR_ERR(skb);
  91                 BT_ERR("%s: BCM: Change address command failed (%d)",
  92                        hdev->name, err);
  93                 return err;
  94         }
  95         kfree_skb(skb);
  96
  97         return 0;
  98 }
  99 EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);
 100
 101 int btbcm_patchram(struct hci_dev *hdev, const struct firmware *fw)
 102 {
 103         const struct hci_command_hdr *cmd;
 104         const u8 *fw_ptr;
 105         size_t fw_size;
 106         struct sk_buff *skb;
 107         u16 opcode;
 108         int err = 0;
 109
 110         /* Start Download */
 111         skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);
 112         if (IS_ERR(skb)) {
 113                 err = PTR_ERR(skb);
 114                 BT_ERR("%s: BCM: Download Minidrv command failed (%d)",
 115                        hdev->name, err);
 116                 goto done;
 117         }
 118         kfree_skb(skb);
 119
 120         /* 50 msec delay after Download Minidrv completes */
 121         msleep(50);
 122
 123         fw_ptr = fw->data;
 124         fw_size = fw->size;
 125
 126         while (fw_size >= sizeof(*cmd)) {
 127                 const u8 *cmd_param;
 128
 129                 cmd = (struct hci_command_hdr *)fw_ptr;
 130                 fw_ptr += sizeof(*cmd);
 131                 fw_size -= sizeof(*cmd);
 132
 133                 if (fw_size < cmd->plen) {
 134                         BT_ERR("%s: BCM: Patch is corrupted", hdev->name);
 135                         err = -EINVAL;
 136                         goto done;
 137                 }
 138
 139                 cmd_param = fw_ptr;
 140                 fw_ptr += cmd->plen;
 141                 fw_size -= cmd->plen;
 142
 143                 opcode = le16_to_cpu(cmd->opcode);
 144
 145                 skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,
 146                                      HCI_INIT_TIMEOUT);
 147                 if (IS_ERR(skb)) {
 148                         err = PTR_ERR(skb);
 149                         BT_ERR("%s: BCM: Patch command %04x failed (%d)",
 150                                hdev->name, opcode, err);
 151                         goto done;
 152                 }
 153                 kfree_skb(skb);
 154         }
 155
 156         /* 250 msec delay after Launch Ram completes */
 157         msleep(250);
 158
 159 done:
 160         return err;
 161 }
 162 EXPORT_SYMBOL(btbcm_patchram);
 163
 164 static int btbcm_reset(struct hci_dev *hdev)
 165 {
 166         struct sk_buff *skb;
 167
 168         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 169         if (IS_ERR(skb)) {
 170                 int err = PTR_ERR(skb);
 171                 BT_ERR("%s: BCM: Reset failed (%d)", hdev->name, err);
 172                 return err;
 173         }
 174         kfree_skb(skb);
 175
 176         return 0;
 177 }
 178
 179 static struct sk_buff *btbcm_read_local_version(struct hci_dev *hdev)
 180 {
 181         struct sk_buff *skb;
 182
 183         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
 184                              HCI_INIT_TIMEOUT);
 185         if (IS_ERR(skb)) {
 186                 BT_ERR("%s: BCM: Reading local version info failed (%ld)",
 187                        hdev->name, PTR_ERR(skb));
 188                 return skb;
 189         }
 190
 191         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
 192                 BT_ERR("%s: BCM: Local version length mismatch", hdev->name);
 193                 kfree_skb(skb);
 194                 return ERR_PTR(-EIO);
 195         }
 196
 197         return skb;
 198 }
 199
 200 static struct sk_buff *btbcm_read_verbose_config(struct hci_dev *hdev)
 201 {
 202         struct sk_buff *skb;
 203
 204         skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);
 205         if (IS_ERR(skb)) {
 206                 BT_ERR("%s: BCM: Read verbose config info failed (%ld)",
 207                        hdev->name, PTR_ERR(skb));
 208                 return skb;
 209         }
 210
 211         if (skb->len != 7) {
 212                 BT_ERR("%s: BCM: Verbose config length mismatch", hdev->name);
 213                 kfree_skb(skb);
 214                 return ERR_PTR(-EIO);
 215         }
 216
 217         return skb;
 218 }
 219
 220 static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev)
 221 {
 222         struct sk_buff *skb;
 223
 224         skb = __hci_cmd_sync(hdev, 0xfc5a, 0, NULL, HCI_INIT_TIMEOUT);
 225         if (IS_ERR(skb)) {
 226                 BT_ERR("%s: BCM: Read USB product info failed (%ld)",
 227                        hdev->name, PTR_ERR(skb));
 228                 return skb;
 229         }
 230
 231         if (skb->len != 5) {
 232                 BT_ERR("%s: BCM: USB product length mismatch", hdev->name);
 233                 kfree_skb(skb);
 234                 return ERR_PTR(-EIO);
 235         }
 236
 237         return skb;
 238 }
 239
 240 static const struct {
 241         u16 subver;
 242         const char *name;
 243 } bcm_uart_subver_table[] = {
 244         { 0x410e, "BCM43341B0"  },      /* 002.001.014 */
 245         { 0x4406, "BCM4324B3"   },      /* 002.004.006 */
 246         { }
 247 };
 248
 249 static const struct {
 250         u16 subver;
 251         const char *name;
 252 } bcm_usb_subver_table[] = {
 253         { 0x210b, "BCM43142A0"  },      /* 001.001.011 */
 254         { 0x2112, "BCM4314A0"   },      /* 001.001.018 */
 255         { 0x2118, "BCM20702A0"  },      /* 001.001.024 */
 256         { 0x2126, "BCM4335A0"   },      /* 001.001.038 */
 257         { 0x220e, "BCM20702A1"  },      /* 001.002.014 */
 258         { 0x230f, "BCM4354A2"   },      /* 001.003.015 */
 259         { 0x4106, "BCM4335B0"   },      /* 002.001.006 */
 260         { 0x410e, "BCM20702B0"  },      /* 002.001.014 */
 261         { 0x6109, "BCM4335C0"   },      /* 003.001.009 */
 262         { 0x610c, "BCM4354"     },      /* 003.001.012 */
 263         { }
 264 };
 265
 266 int btbcm_setup_patchram(struct hci_dev *hdev)
 267 {
 268         char fw_name[64];
 269         const struct firmware *fw;
 270         u16 subver, rev, pid, vid;
 271         const char *hw_name = NULL;
 272         struct sk_buff *skb;
 273         struct hci_rp_read_local_version *ver;
 274         int i, err;
 275
 276         /* Reset */
 277         err = btbcm_reset(hdev);
 278         if (err)
 279                 return err;
 280
 281         /* Read Local Version Info */
 282         skb = btbcm_read_local_version(hdev);
 283         if (IS_ERR(skb))
 284                 return PTR_ERR(skb);
 285
 286         ver = (struct hci_rp_read_local_version *)skb->data;
 287         rev = le16_to_cpu(ver->hci_rev);
 288         subver = le16_to_cpu(ver->lmp_subver);
 289         kfree_skb(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_INFO("%s: BCM: chip id %u", hdev->name, skb->data[1]);
 297         kfree_skb(skb);
 298
 299         switch ((rev & 0xf000) >> 12) {
 300         case 0:
 301         case 3:
 302                 for (i = 0; bcm_uart_subver_table[i].name; i++) {
 303                         if (subver == bcm_uart_subver_table[i].subver) {
 304                                 hw_name = bcm_uart_subver_table[i].name;
 305                                 break;
 306                         }
 307                 }
 308
 309                 snprintf(fw_name, sizeof(fw_name), "brcm/%s.hcd",
 310                          hw_name ? : "BCM");
 311                 break;
 312         case 1:
 313         case 2:
 314                 /* Read USB Product Info */
 315                 skb = btbcm_read_usb_product(hdev);
 316                 if (IS_ERR(skb))
 317                         return PTR_ERR(skb);
 318
 319                 vid = get_unaligned_le16(skb->data + 1);
 320                 pid = get_unaligned_le16(skb->data + 3);
 321                 kfree_skb(skb);
 322
 323                 for (i = 0; bcm_usb_subver_table[i].name; i++) {
 324                         if (subver == bcm_usb_subver_table[i].subver) {
 325                                 hw_name = bcm_usb_subver_table[i].name;
 326                                 break;
 327                         }
 328                 }
 329
 330                 snprintf(fw_name, sizeof(fw_name), "brcm/%s-%4.4x-%4.4x.hcd",
 331                          hw_name ? : "BCM", vid, pid);
 332                 break;
 333         default:
 334                 return 0;
 335         }
 336
 337         BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 338                 hw_name ? : "BCM", (subver & 0x7000) >> 13,
 339                 (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 340
 341         err = request_firmware(&fw, fw_name, &hdev->dev);
 342         if (err < 0) {
 343                 BT_INFO("%s: BCM: Patch %s not found", hdev->name, fw_name);
 344                 return 0;
 345         }
 346
 347         btbcm_patchram(hdev, fw);
 348
 349         release_firmware(fw);
 350
 351         /* Reset */
 352         err = btbcm_reset(hdev);
 353         if (err)
 354                 return err;
 355
 356         /* Read Local Version Info */
 357         skb = btbcm_read_local_version(hdev);
 358         if (IS_ERR(skb))
 359                 return PTR_ERR(skb);
 360
 361         ver = (struct hci_rp_read_local_version *)skb->data;
 362         rev = le16_to_cpu(ver->hci_rev);
 363         subver = le16_to_cpu(ver->lmp_subver);
 364         kfree_skb(skb);
 365
 366         BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 367                 hw_name ? : "BCM", (subver & 0x7000) >> 13,
 368                 (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 369
 370         btbcm_check_bdaddr(hdev);
 371
 372         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 373
 374         return 0;
 375 }
 376 EXPORT_SYMBOL_GPL(btbcm_setup_patchram);
 377
 378 int btbcm_setup_apple(struct hci_dev *hdev)
 379 {
 380         struct sk_buff *skb;
 381
 382         /* Read Verbose Config Version Info */
 383         skb = btbcm_read_verbose_config(hdev);
 384         if (IS_ERR(skb))
 385                 return PTR_ERR(skb);
 386
 387         BT_INFO("%s: BCM: chip id %u build %4.4u", hdev->name, skb->data[1],
 388                 get_unaligned_le16(skb->data + 5));
 389         kfree_skb(skb);
 390
 391         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 392
 393         return 0;
 394 }
 395 EXPORT_SYMBOL_GPL(btbcm_setup_apple);
 396
 397 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 398 MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
 399 MODULE_VERSION(VERSION);
 400 MODULE_LICENSE("GPL");