drivers/staging/rtl8192e/rtl8192e/rtl_cam.c

   1 /******************************************************************************
   2  * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
   3  *
   4  * Based on the r8180 driver, which is:
   5  * Copyright 2004-2005 Andrea Merello <andrea.merello@gmail.com>, et al.
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of version 2 of the GNU General Public License as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  18  *
  19  * The full GNU General Public License is included in this distribution in the
  20  * file called LICENSE.
  21  *
  22  * Contact Information:
  23  * wlanfae <wlanfae@realtek.com>
  24 ******************************************************************************/
  25 #include "rtl_core.h"
  26 #include "r8192E_phy.h"
  27 #include "r8192E_phyreg.h"
  28 #include "r8190P_rtl8256.h" /* RTL8225 Radio frontend */
  29 #include "r8192E_cmdpkt.h"
  30
  31 void CamResetAllEntry(struct net_device *dev)
  32 {
  33         u32 ulcommand = 0;
  34
  35         ulcommand |= BIT31|BIT30;
  36         write_nic_dword(dev, RWCAM, ulcommand);
  37 }
  38
  39 void write_cam(struct net_device *dev, u8 addr, u32 data)
  40 {
  41         write_nic_dword(dev, WCAMI, data);
  42         write_nic_dword(dev, RWCAM, BIT31|BIT16|(addr&0xff));
  43 }
  44
  45 u32 read_cam(struct net_device *dev, u8 addr)
  46 {
  47         write_nic_dword(dev, RWCAM, 0x80000000|(addr&0xff));
  48         return read_nic_dword(dev, 0xa8);
  49 }
  50
  51 void EnableHWSecurityConfig8192(struct net_device *dev)
  52 {
  53         u8 SECR_value = 0x0;
  54         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
  55         struct rtllib_device *ieee = priv->rtllib;
  56
  57         SECR_value = SCR_TxEncEnable | SCR_RxDecEnable;
  58         if (((KEY_TYPE_WEP40 == ieee->pairwise_key_type) ||
  59              (KEY_TYPE_WEP104 == ieee->pairwise_key_type)) &&
  60              (priv->rtllib->auth_mode != 2)) {
  61                 SECR_value |= SCR_RxUseDK;
  62                 SECR_value |= SCR_TxUseDK;
  63         } else if ((ieee->iw_mode == IW_MODE_ADHOC) &&
  64                    (ieee->pairwise_key_type & (KEY_TYPE_CCMP |
  65                    KEY_TYPE_TKIP))) {
  66                 SECR_value |= SCR_RxUseDK;
  67                 SECR_value |= SCR_TxUseDK;
  68         }
  69
  70
  71         ieee->hwsec_active = 1;
  72         if ((ieee->pHTInfo->IOTAction&HT_IOT_ACT_PURE_N_MODE) || !hwwep) {
  73                 ieee->hwsec_active = 0;
  74                 SECR_value &= ~SCR_RxDecEnable;
  75         }
  76
  77         RT_TRACE(COMP_SEC, "%s:, hwsec:%d, pairwise_key:%d, SECR_value:%x\n",
  78                  __func__, ieee->hwsec_active, ieee->pairwise_key_type,
  79                  SECR_value);
  80         write_nic_byte(dev, SECR,  SECR_value);
  81 }
  82
  83 void set_swcam(struct net_device *dev, u8 EntryNo, u8 KeyIndex, u16 KeyType,
  84                u8 *MacAddr, u8 DefaultKey, u32 *KeyContent, u8 is_mesh)
  85 {
  86         struct r8192_priv *priv = rtllib_priv(dev);
  87         struct rtllib_device *ieee = priv->rtllib;
  88
  89         RT_TRACE(COMP_DBG, "===========>%s():EntryNo is %d,KeyIndex is "
  90                  "%d,KeyType is %d,is_mesh is %d\n", __func__, EntryNo,
  91                  KeyIndex, KeyType, is_mesh);
  92         if (!is_mesh) {
  93                 ieee->swcamtable[EntryNo].bused = true;
  94                 ieee->swcamtable[EntryNo].key_index = KeyIndex;
  95                 ieee->swcamtable[EntryNo].key_type = KeyType;
  96                 memcpy(ieee->swcamtable[EntryNo].macaddr, MacAddr, 6);
  97                 ieee->swcamtable[EntryNo].useDK = DefaultKey;
  98                 memcpy(ieee->swcamtable[EntryNo].key_buf, (u8 *)KeyContent, 16);
  99         }
 100 }
 101
 102 void setKey(struct net_device *dev, u8 EntryNo, u8 KeyIndex, u16 KeyType,
 103             u8 *MacAddr, u8 DefaultKey, u32 *KeyContent)
 104 {
 105         u32 TargetCommand = 0;
 106         u32 TargetContent = 0;
 107         u16 usConfig = 0;
 108         u8 i;
 109         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 110         enum rt_rf_power_state rtState;
 111
 112         rtState = priv->rtllib->eRFPowerState;
 113         if (priv->rtllib->PowerSaveControl.bInactivePs) {
 114                 if (rtState == eRfOff) {
 115                         if (priv->rtllib->RfOffReason > RF_CHANGE_BY_IPS) {
 116                                 RT_TRACE(COMP_ERR, "%s(): RF is OFF.\n",
 117                                         __func__);
 118                                 return ;
 119                         } else {
 120                                 down(&priv->rtllib->ips_sem);
 121                                 IPSLeave(dev);
 122                                 up(&priv->rtllib->ips_sem);
 123                         }
 124                 }
 125         }
 126         priv->rtllib->is_set_key = true;
 127         if (EntryNo >= TOTAL_CAM_ENTRY)
 128                 RT_TRACE(COMP_ERR, "cam entry exceeds in setKey()\n");
 129
 130         RT_TRACE(COMP_SEC, "====>to setKey(), dev:%p, EntryNo:%d, KeyIndex:%d,"
 131                  "KeyType:%d, MacAddr %pM\n", dev, EntryNo, KeyIndex,
 132                  KeyType, MacAddr);
 133
 134         if (DefaultKey)
 135                 usConfig |= BIT15 | (KeyType<<2);
 136         else
 137                 usConfig |= BIT15 | (KeyType<<2) | KeyIndex;
 138
 139
 140         for (i = 0; i < CAM_CONTENT_COUNT; i++) {
 141                 TargetCommand  = i + CAM_CONTENT_COUNT * EntryNo;
 142                 TargetCommand |= BIT31|BIT16;
 143
 144                 if (i == 0) {
 145                         TargetContent = (u32)(*(MacAddr+0)) << 16 |
 146                                 (u32)(*(MacAddr+1)) << 24 |
 147                                 (u32)usConfig;
 148
 149                         write_nic_dword(dev, WCAMI, TargetContent);
 150                         write_nic_dword(dev, RWCAM, TargetCommand);
 151                 } else if (i == 1) {
 152                         TargetContent = (u32)(*(MacAddr+2)) |
 153                                 (u32)(*(MacAddr+3)) <<  8 |
 154                                 (u32)(*(MacAddr+4)) << 16 |
 155                                 (u32)(*(MacAddr+5)) << 24;
 156                         write_nic_dword(dev, WCAMI, TargetContent);
 157                         write_nic_dword(dev, RWCAM, TargetCommand);
 158                 } else {
 159                         if (KeyContent != NULL) {
 160                                 write_nic_dword(dev, WCAMI,
 161                                                 (u32)(*(KeyContent+i-2)));
 162                                 write_nic_dword(dev, RWCAM, TargetCommand);
 163                                 udelay(100);
 164                         }
 165                 }
 166         }
 167         RT_TRACE(COMP_SEC, "=========>after set key, usconfig:%x\n", usConfig);
 168 }
 169
 170 void CamRestoreAllEntry(struct net_device *dev)
 171 {
 172         u8 EntryId = 0;
 173         struct r8192_priv *priv = rtllib_priv(dev);
 174         u8 *MacAddr = priv->rtllib->current_network.bssid;
 175
 176         static u8       CAM_CONST_ADDR[4][6] = {
 177                 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
 178                 {0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
 179                 {0x00, 0x00, 0x00, 0x00, 0x00, 0x02},
 180                 {0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
 181         };
 182         static u8       CAM_CONST_BROAD[] = {
 183                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
 184         };
 185
 186         RT_TRACE(COMP_SEC, "CamRestoreAllEntry:\n");
 187
 188
 189         if ((priv->rtllib->pairwise_key_type == KEY_TYPE_WEP40) ||
 190             (priv->rtllib->pairwise_key_type == KEY_TYPE_WEP104)) {
 191
 192                 for (EntryId = 0; EntryId < 4; EntryId++) {
 193                         MacAddr = CAM_CONST_ADDR[EntryId];
 194                         if (priv->rtllib->swcamtable[EntryId].bused) {
 195                                 setKey(dev, EntryId , EntryId,
 196                                        priv->rtllib->pairwise_key_type, MacAddr,
 197                                        0, (u32 *)(&priv->rtllib->swcamtable
 198                                       [EntryId].key_buf[0]));
 199                         }
 200                 }
 201
 202         } else if (priv->rtllib->pairwise_key_type == KEY_TYPE_TKIP) {
 203                 if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 204                         setKey(dev, 4, 0, priv->rtllib->pairwise_key_type,
 205                                (u8 *)dev->dev_addr, 0,
 206                                (u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
 207                 } else {
 208                         setKey(dev, 4, 0, priv->rtllib->pairwise_key_type,
 209                                MacAddr, 0,
 210                                (u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
 211                 }
 212
 213         } else if (priv->rtllib->pairwise_key_type == KEY_TYPE_CCMP) {
 214                 if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 215                         setKey(dev, 4, 0,
 216                                priv->rtllib->pairwise_key_type,
 217                                (u8 *)dev->dev_addr, 0,
 218                                (u32 *)(&priv->rtllib->swcamtable[4].
 219                                key_buf[0]));
 220                 } else {
 221                         setKey(dev, 4, 0,
 222                                priv->rtllib->pairwise_key_type, MacAddr,
 223                                0, (u32 *)(&priv->rtllib->swcamtable[4].
 224                                key_buf[0]));
 225                         }
 226         }
 227
 228         if (priv->rtllib->group_key_type == KEY_TYPE_TKIP) {
 229                 MacAddr = CAM_CONST_BROAD;
 230                 for (EntryId = 1; EntryId < 4; EntryId++) {
 231                         if (priv->rtllib->swcamtable[EntryId].bused) {
 232                                 setKey(dev, EntryId, EntryId,
 233                                         priv->rtllib->group_key_type,
 234                                         MacAddr, 0,
 235                                         (u32 *)(&priv->rtllib->swcamtable[EntryId].key_buf[0])
 236                                      );
 237                         }
 238                 }
 239                 if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 240                         if (priv->rtllib->swcamtable[0].bused) {
 241                                 setKey(dev, 0, 0,
 242                                        priv->rtllib->group_key_type,
 243                                        CAM_CONST_ADDR[0], 0,
 244                                        (u32 *)(&priv->rtllib->swcamtable[0].key_buf[0])
 245                                      );
 246                         } else {
 247                                 RT_TRACE(COMP_ERR, "===>%s():ERR!! ADHOC TKIP "
 248                                          ",but 0 entry is have no data\n",
 249                                          __func__);
 250                                 return;
 251                         }
 252                 }
 253         } else if (priv->rtllib->group_key_type == KEY_TYPE_CCMP) {
 254                 MacAddr = CAM_CONST_BROAD;
 255                 for (EntryId = 1; EntryId < 4; EntryId++) {
 256                         if (priv->rtllib->swcamtable[EntryId].bused) {
 257                                 setKey(dev, EntryId , EntryId,
 258                                        priv->rtllib->group_key_type,
 259                                        MacAddr, 0,
 260                                        (u32 *)(&priv->rtllib->swcamtable[EntryId].key_buf[0]));
 261                         }
 262                 }
 263
 264                 if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 265                         if (priv->rtllib->swcamtable[0].bused) {
 266                                 setKey(dev, 0 , 0,
 267                                         priv->rtllib->group_key_type,
 268                                         CAM_CONST_ADDR[0], 0,
 269                                         (u32 *)(&priv->rtllib->swcamtable[0].key_buf[0]));
 270                         } else {
 271                                 RT_TRACE(COMP_ERR, "===>%s():ERR!! ADHOC CCMP ,"
 272                                          "but 0 entry is have no data\n",
 273                                          __func__);
 274                                 return;
 275                         }
 276                 }
 277         }
 278 }