drivers/bluetooth/btintel.c

   1 /*
   2  *
   3  *  Bluetooth support for Intel 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
  26 #include <net/bluetooth/bluetooth.h>
  27 #include <net/bluetooth/hci_core.h>
  28
  29 #include "btintel.h"
  30
  31 #define VERSION "0.1"
  32
  33 #define BDADDR_INTEL (&(bdaddr_t) {{0x00, 0x8b, 0x9e, 0x19, 0x03, 0x00}})
  34
  35 int btintel_check_bdaddr(struct hci_dev *hdev)
  36 {
  37         struct hci_rp_read_bd_addr *bda;
  38         struct sk_buff *skb;
  39
  40         skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
  41                              HCI_INIT_TIMEOUT);
  42         if (IS_ERR(skb)) {
  43                 int err = PTR_ERR(skb);
  44                 BT_ERR("%s: Reading Intel device address failed (%d)",
  45                        hdev->name, err);
  46                 return err;
  47         }
  48
  49         if (skb->len != sizeof(*bda)) {
  50                 BT_ERR("%s: Intel device address length mismatch", hdev->name);
  51                 kfree_skb(skb);
  52                 return -EIO;
  53         }
  54
  55         bda = (struct hci_rp_read_bd_addr *)skb->data;
  56
  57         /* For some Intel based controllers, the default Bluetooth device
  58          * address 00:03:19:9E:8B:00 can be found. These controllers are
  59          * fully operational, but have the danger of duplicate addresses
  60          * and that in turn can cause problems with Bluetooth operation.
  61          */
  62         if (!bacmp(&bda->bdaddr, BDADDR_INTEL)) {
  63                 BT_ERR("%s: Found Intel default device address (%pMR)",
  64                        hdev->name, &bda->bdaddr);
  65                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
  66         }
  67
  68         kfree_skb(skb);
  69
  70         return 0;
  71 }
  72 EXPORT_SYMBOL_GPL(btintel_check_bdaddr);
  73
  74 int btintel_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
  75 {
  76         struct sk_buff *skb;
  77         int err;
  78
  79         skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT);
  80         if (IS_ERR(skb)) {
  81                 err = PTR_ERR(skb);
  82                 BT_ERR("%s: Changing Intel device address failed (%d)",
  83                        hdev->name, err);
  84                 return err;
  85         }
  86         kfree_skb(skb);
  87
  88         return 0;
  89 }
  90 EXPORT_SYMBOL_GPL(btintel_set_bdaddr);
  91
  92 void btintel_hw_error(struct hci_dev *hdev, u8 code)
  93 {
  94         struct sk_buff *skb;
  95         u8 type = 0x00;
  96
  97         BT_ERR("%s: Hardware error 0x%2.2x", hdev->name, code);
  98
  99         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 100         if (IS_ERR(skb)) {
 101                 BT_ERR("%s: Reset after hardware error failed (%ld)",
 102                        hdev->name, PTR_ERR(skb));
 103                 return;
 104         }
 105         kfree_skb(skb);
 106
 107         skb = __hci_cmd_sync(hdev, 0xfc22, 1, &type, HCI_INIT_TIMEOUT);
 108         if (IS_ERR(skb)) {
 109                 BT_ERR("%s: Retrieving Intel exception info failed (%ld)",
 110                        hdev->name, PTR_ERR(skb));
 111                 return;
 112         }
 113
 114         if (skb->len != 13) {
 115                 BT_ERR("%s: Exception info size mismatch", hdev->name);
 116                 kfree_skb(skb);
 117                 return;
 118         }
 119
 120         BT_ERR("%s: Exception info %s", hdev->name, (char *)(skb->data + 1));
 121
 122         kfree_skb(skb);
 123 }
 124 EXPORT_SYMBOL_GPL(btintel_hw_error);
 125
 126 void btintel_version_info(struct hci_dev *hdev, struct intel_version *ver)
 127 {
 128         const char *variant;
 129
 130         switch (ver->fw_variant) {
 131         case 0x06:
 132                 variant = "Bootloader";
 133                 break;
 134         case 0x23:
 135                 variant = "Firmware";
 136                 break;
 137         default:
 138                 return;
 139         }
 140
 141         BT_INFO("%s: %s revision %u.%u build %u week %u %u", hdev->name,
 142                 variant, ver->fw_revision >> 4, ver->fw_revision & 0x0f,
 143                 ver->fw_build_num, ver->fw_build_ww, 2000 + ver->fw_build_yy);
 144 }
 145 EXPORT_SYMBOL_GPL(btintel_version_info);
 146
 147 int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen,
 148                         const void *param)
 149 {
 150         while (plen > 0) {
 151                 struct sk_buff *skb;
 152                 u8 cmd_param[253], fragment_len = (plen > 252) ? 252 : plen;
 153
 154                 cmd_param[0] = fragment_type;
 155                 memcpy(cmd_param + 1, param, fragment_len);
 156
 157                 skb = __hci_cmd_sync(hdev, 0xfc09, fragment_len + 1,
 158                                      cmd_param, HCI_INIT_TIMEOUT);
 159                 if (IS_ERR(skb))
 160                         return PTR_ERR(skb);
 161
 162                 kfree_skb(skb);
 163
 164                 plen -= fragment_len;
 165                 param += fragment_len;
 166         }
 167
 168         return 0;
 169 }
 170 EXPORT_SYMBOL_GPL(btintel_secure_send);
 171
 172 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 173 MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
 174 MODULE_VERSION(VERSION);
 175 MODULE_LICENSE("GPL");
 176 MODULE_FIRMWARE("intel/ibt-11-5.sfi");
 177 MODULE_FIRMWARE("intel/ibt-11-5.ddc");