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
  37 int btbcm_check_bdaddr(struct hci_dev *hdev)
  38 {
  39         struct hci_rp_read_bd_addr *bda;
  40         struct sk_buff *skb;
  41
  42         skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
  43                              HCI_INIT_TIMEOUT);
  44         if (IS_ERR(skb)) {
  45                 int err = PTR_ERR(skb);
  46                 BT_ERR("%s: BCM: Reading device address failed (%d)",
  47                        hdev->name, err);
  48                 return err;
  49         }
  50
  51         if (skb->len != sizeof(*bda)) {
  52                 BT_ERR("%s: BCM: Device address length mismatch", hdev->name);
  53                 kfree_skb(skb);
  54                 return -EIO;
  55         }
  56
  57         bda = (struct hci_rp_read_bd_addr *)skb->data;
  58         if (bda->status) {
  59                 BT_ERR("%s: BCM: Device address result failed (%02x)",
  60                        hdev->name, bda->status);
  61                 kfree_skb(skb);
  62                 return -bt_to_errno(bda->status);
  63         }
  64
  65         /* The address 00:20:70:02:A0:00 indicates a BCM20702A0 controller
  66          * with no configured address.
  67          */
  68         if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0)) {
  69                 BT_INFO("%s: BCM: Using default device address (%pMR)",
  70                         hdev->name, &bda->bdaddr);
  71                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
  72         }
  73
  74         kfree_skb(skb);
  75
  76         return 0;
  77 }
  78 EXPORT_SYMBOL_GPL(btbcm_check_bdaddr);
  79
  80 int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
  81 {
  82         struct sk_buff *skb;
  83         int err;
  84
  85         skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
  86         if (IS_ERR(skb)) {
  87                 err = PTR_ERR(skb);
  88                 BT_ERR("%s: BCM: Change address command failed (%d)",
  89                        hdev->name, err);
  90                 return err;
  91         }
  92         kfree_skb(skb);
  93
  94         return 0;
  95 }
  96 EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);
  97
  98 static int btbcm_reset(struct hci_dev *hdev)
  99 {
 100         struct sk_buff *skb;
 101
 102         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 103         if (IS_ERR(skb)) {
 104                 int err = PTR_ERR(skb);
 105                 BT_ERR("%s: BCM: Reset failed (%d)", hdev->name, err);
 106                 return err;
 107         }
 108         kfree_skb(skb);
 109
 110         return 0;
 111 }
 112
 113 static struct sk_buff *btbcm_read_local_version(struct hci_dev *hdev)
 114 {
 115         struct sk_buff *skb;
 116
 117         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
 118                              HCI_INIT_TIMEOUT);
 119         if (IS_ERR(skb)) {
 120                 BT_ERR("%s: BCM: Reading local version info failed (%ld)",
 121                        hdev->name, PTR_ERR(skb));
 122                 return skb;
 123         }
 124
 125         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
 126                 BT_ERR("%s: BCM: Local version length mismatch", hdev->name);
 127                 kfree_skb(skb);
 128                 return ERR_PTR(-EIO);
 129         }
 130
 131         return skb;
 132 }
 133
 134 static struct sk_buff *btbcm_read_verbose_config(struct hci_dev *hdev)
 135 {
 136         struct sk_buff *skb;
 137
 138         skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);
 139         if (IS_ERR(skb)) {
 140                 BT_ERR("%s: BCM: Read verbose config info failed (%ld)",
 141                        hdev->name, PTR_ERR(skb));
 142                 return skb;
 143         }
 144
 145         if (skb->len != 7) {
 146                 BT_ERR("%s: BCM: Verbose config length mismatch", hdev->name);
 147                 kfree_skb(skb);
 148                 return ERR_PTR(-EIO);
 149         }
 150
 151         return skb;
 152 }
 153
 154 static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev)
 155 {
 156         struct sk_buff *skb;
 157
 158         skb = __hci_cmd_sync(hdev, 0xfc5a, 0, NULL, HCI_INIT_TIMEOUT);
 159         if (IS_ERR(skb)) {
 160                 BT_ERR("%s: BCM: Read USB product info failed (%ld)",
 161                        hdev->name, PTR_ERR(skb));
 162                 return skb;
 163         }
 164
 165         if (skb->len != 5) {
 166                 BT_ERR("%s: BCM: USB product length mismatch", hdev->name);
 167                 kfree_skb(skb);
 168                 return ERR_PTR(-EIO);
 169         }
 170
 171         return skb;
 172 }
 173
 174 static const struct {
 175         u16 subver;
 176         const char *name;
 177 } bcm_subver_table[] = {
 178         { 0x210b, "BCM43142A0"  },      /* 001.001.011 */
 179         { 0x2112, "BCM4314A0"   },      /* 001.001.018 */
 180         { 0x2118, "BCM20702A0"  },      /* 001.001.024 */
 181         { 0x2126, "BCM4335A0"   },      /* 001.001.038 */
 182         { 0x220e, "BCM20702A1"  },      /* 001.002.014 */
 183         { 0x230f, "BCM4354A2"   },      /* 001.003.015 */
 184         { 0x4106, "BCM4335B0"   },      /* 002.001.006 */
 185         { 0x410e, "BCM20702B0"  },      /* 002.001.014 */
 186         { 0x6109, "BCM4335C0"   },      /* 003.001.009 */
 187         { 0x610c, "BCM4354"     },      /* 003.001.012 */
 188         { }
 189 };
 190
 191 int btbcm_setup_patchram(struct hci_dev *hdev)
 192 {
 193         const struct hci_command_hdr *cmd;
 194         const struct firmware *fw;
 195         const u8 *fw_ptr;
 196         size_t fw_size;
 197         char fw_name[64];
 198         u16 opcode, subver, rev, pid, vid;
 199         const char *hw_name = NULL;
 200         struct sk_buff *skb;
 201         struct hci_rp_read_local_version *ver;
 202         int i, err;
 203
 204         /* Reset */
 205         err = btbcm_reset(hdev);
 206         if (err)
 207                 return err;
 208
 209         /* Read Local Version Info */
 210         skb = btbcm_read_local_version(hdev);
 211         if (IS_ERR(skb))
 212                 return PTR_ERR(skb);
 213
 214         ver = (struct hci_rp_read_local_version *)skb->data;
 215         rev = le16_to_cpu(ver->hci_rev);
 216         subver = le16_to_cpu(ver->lmp_subver);
 217         kfree_skb(skb);
 218
 219         /* Read Verbose Config Version Info */
 220         skb = btbcm_read_verbose_config(hdev);
 221         if (IS_ERR(skb))
 222                 return PTR_ERR(skb);
 223
 224         BT_INFO("%s: BCM: chip id %u", hdev->name, skb->data[1]);
 225         kfree_skb(skb);
 226
 227         /* Read USB Product Info */
 228         skb = btbcm_read_usb_product(hdev);
 229         if (IS_ERR(skb))
 230                 return PTR_ERR(skb);
 231
 232         vid = get_unaligned_le16(skb->data + 1);
 233         pid = get_unaligned_le16(skb->data + 3);
 234         kfree_skb(skb);
 235
 236         for (i = 0; bcm_subver_table[i].name; i++) {
 237                 if (subver == bcm_subver_table[i].subver) {
 238                         hw_name = bcm_subver_table[i].name;
 239                         break;
 240                 }
 241         }
 242
 243         BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 244                 hw_name ? : "BCM", (subver & 0x7000) >> 13,
 245                 (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 246
 247         snprintf(fw_name, sizeof(fw_name), "brcm/%s-%4.4x-%4.4x.hcd",
 248                  hw_name ? : "BCM", vid, pid);
 249
 250         err = request_firmware(&fw, fw_name, &hdev->dev);
 251         if (err < 0) {
 252                 BT_INFO("%s: BCM: patch %s not found", hdev->name, fw_name);
 253                 return 0;
 254         }
 255
 256         /* Start Download */
 257         skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);
 258         if (IS_ERR(skb)) {
 259                 err = PTR_ERR(skb);
 260                 BT_ERR("%s: BCM: Download Minidrv command failed (%d)",
 261                        hdev->name, err);
 262                 goto reset;
 263         }
 264         kfree_skb(skb);
 265
 266         /* 50 msec delay after Download Minidrv completes */
 267         msleep(50);
 268
 269         fw_ptr = fw->data;
 270         fw_size = fw->size;
 271
 272         while (fw_size >= sizeof(*cmd)) {
 273                 const u8 *cmd_param;
 274
 275                 cmd = (struct hci_command_hdr *)fw_ptr;
 276                 fw_ptr += sizeof(*cmd);
 277                 fw_size -= sizeof(*cmd);
 278
 279                 if (fw_size < cmd->plen) {
 280                         BT_ERR("%s: BCM: patch %s is corrupted", hdev->name,
 281                                fw_name);
 282                         err = -EINVAL;
 283                         goto reset;
 284                 }
 285
 286                 cmd_param = fw_ptr;
 287                 fw_ptr += cmd->plen;
 288                 fw_size -= cmd->plen;
 289
 290                 opcode = le16_to_cpu(cmd->opcode);
 291
 292                 skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,
 293                                      HCI_INIT_TIMEOUT);
 294                 if (IS_ERR(skb)) {
 295                         err = PTR_ERR(skb);
 296                         BT_ERR("%s: BCM: patch command %04x failed (%d)",
 297                                hdev->name, opcode, err);
 298                         goto reset;
 299                 }
 300                 kfree_skb(skb);
 301         }
 302
 303         /* 250 msec delay after Launch Ram completes */
 304         msleep(250);
 305
 306 reset:
 307         /* Reset */
 308         err = btbcm_reset(hdev);
 309         if (err)
 310                 goto done;
 311
 312         /* Read Local Version Info */
 313         skb = btbcm_read_local_version(hdev);
 314         if (IS_ERR(skb)) {
 315                 err = PTR_ERR(skb);
 316                 goto done;
 317         }
 318
 319         ver = (struct hci_rp_read_local_version *)skb->data;
 320         rev = le16_to_cpu(ver->hci_rev);
 321         subver = le16_to_cpu(ver->lmp_subver);
 322         kfree_skb(skb);
 323
 324         BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 325                 hw_name ? : "BCM", (subver & 0x7000) >> 13,
 326                 (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
 327
 328         btbcm_check_bdaddr(hdev);
 329
 330         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 331
 332 done:
 333         release_firmware(fw);
 334
 335         return err;
 336 }
 337 EXPORT_SYMBOL_GPL(btbcm_setup_patchram);
 338
 339 int btbcm_setup_apple(struct hci_dev *hdev)
 340 {
 341         struct sk_buff *skb;
 342
 343         /* Read Verbose Config Version Info */
 344         skb = btbcm_read_verbose_config(hdev);
 345         if (IS_ERR(skb))
 346                 return PTR_ERR(skb);
 347
 348         BT_INFO("%s: BCM: chip id %u build %4.4u", hdev->name, skb->data[1],
 349                 get_unaligned_le16(skb->data + 5));
 350         kfree_skb(skb);
 351
 352         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 353
 354         return 0;
 355 }
 356 EXPORT_SYMBOL_GPL(btbcm_setup_apple);
 357
 358 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 359 MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
 360 MODULE_VERSION(VERSION);
 361 MODULE_LICENSE("GPL");