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         SECR_value = SCR_TxEncEnable | SCR_RxDecEnable;
  57         if (((KEY_TYPE_WEP40 == ieee->pairwise_key_type) ||
  58              (KEY_TYPE_WEP104 == ieee->pairwise_key_type)) &&
  59              (priv->rtllib->auth_mode != 2)) {
  60                 SECR_value |= SCR_RxUseDK;
  61                 SECR_value |= SCR_TxUseDK;
  62         } else if ((ieee->iw_mode == IW_MODE_ADHOC) &&
  63                    (ieee->pairwise_key_type & (KEY_TYPE_CCMP |
  64                    KEY_TYPE_TKIP))) {
  65                 SECR_value |= SCR_RxUseDK;
  66                 SECR_value |= SCR_TxUseDK;
  67         }
  68
  69
  70         ieee->hwsec_active = 1;
  71         if ((ieee->pHTInfo->IOTAction&HT_IOT_ACT_PURE_N_MODE) || !hwwep) {
  72                 ieee->hwsec_active = 0;
  73                 SECR_value &= ~SCR_RxDecEnable;
  74         }
  75
  76         RT_TRACE(COMP_SEC, "%s:, hwsec:%d, pairwise_key:%d, SECR_value:%x\n",
  77                  __func__, ieee->hwsec_active, ieee->pairwise_key_type,
  78                  SECR_value);
  79         write_nic_byte(dev, SECR,  SECR_value);
  80 }
  81
  82 void set_swcam(struct net_device *dev, u8 EntryNo, u8 KeyIndex, u16 KeyType,
  83                u8 *MacAddr, u8 DefaultKey, u32 *KeyContent, u8 is_mesh)
  84 {
  85         struct r8192_priv *priv = rtllib_priv(dev);
  86         struct rtllib_device *ieee = priv->rtllib;
  87         RT_TRACE(COMP_DBG, "===========>%s():EntryNo is %d,KeyIndex is "
  88                  "%d,KeyType is %d,is_mesh is %d\n", __func__, EntryNo,
  89                  KeyIndex, KeyType, is_mesh);
  90         if (!is_mesh) {
  91                 ieee->swcamtable[EntryNo].bused = true;
  92                 ieee->swcamtable[EntryNo].key_index = KeyIndex;
  93                 ieee->swcamtable[EntryNo].key_type = KeyType;
  94                 memcpy(ieee->swcamtable[EntryNo].macaddr, MacAddr, 6);
  95                 ieee->swcamtable[EntryNo].useDK = DefaultKey;
  96                 memcpy(ieee->swcamtable[EntryNo].key_buf, (u8 *)KeyContent, 16);
  97         }
  98 }
  99
 100 void setKey(struct net_device *dev, u8 EntryNo, u8 KeyIndex, u16 KeyType,
 101             u8 *MacAddr, u8 DefaultKey, u32 *KeyContent)
 102 {
 103         u32 TargetCommand = 0;
 104         u32 TargetContent = 0;
 105         u16 usConfig = 0;
 106         u8 i;
 107         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 108         enum rt_rf_power_state rtState;
 109         rtState = priv->rtllib->eRFPowerState;
 110         if (priv->rtllib->PowerSaveControl.bInactivePs) {
 111                 if (rtState == eRfOff) {
 112                         if (priv->rtllib->RfOffReason > RF_CHANGE_BY_IPS) {
 113                                 RT_TRACE(COMP_ERR, "%s(): RF is OFF.\n",
 114                                         __func__);
 115                                 return ;
 116                         } else {
 117                                 down(&priv->rtllib->ips_sem);
 118                                 IPSLeave(dev);
 119                                 up(&priv->rtllib->ips_sem);
 120                         }
 121                 }
 122         }
 123         priv->rtllib->is_set_key = true;
 124         if (EntryNo >= TOTAL_CAM_ENTRY)
 125                 RT_TRACE(COMP_ERR, "cam entry exceeds in setKey()\n");
 126
 127         RT_TRACE(COMP_SEC, "====>to setKey(), dev:%p, EntryNo:%d, KeyIndex:%d,"
 128                  "KeyType:%d, MacAddr %pM\n", dev, EntryNo, KeyIndex,
 129                  KeyType, MacAddr);
 130
 131         if (DefaultKey)
 132                 usConfig |= BIT15 | (KeyType<<2);
 133         else
 134                 usConfig |= BIT15 | (KeyType<<2) | KeyIndex;
 135
 136
 137         for (i = 0; i < CAM_CONTENT_COUNT; i++) {
 138                 TargetCommand  = i + CAM_CONTENT_COUNT * EntryNo;
 139                 TargetCommand |= BIT31|BIT16;
 140
 141                 if (i == 0) {
 142                         TargetContent = (u32)(*(MacAddr+0)) << 16 |
 143                                 (u32)(*(MacAddr+1)) << 24 |
 144                                 (u32)usConfig;
 145
 146                         write_nic_dword(dev, WCAMI, TargetContent);
 147                         write_nic_dword(dev, RWCAM, TargetCommand);
 148                 } else if (i == 1) {
 149                         TargetContent = (u32)(*(MacAddr+2)) |
 150                                 (u32)(*(MacAddr+3)) <<  8 |
 151                                 (u32)(*(MacAddr+4)) << 16 |
 152                                 (u32)(*(MacAddr+5)) << 24;
 153                         write_nic_dword(dev, WCAMI, TargetContent);
 154                         write_nic_dword(dev, RWCAM, TargetCommand);
 155                 } else {
 156                         if (KeyContent != NULL) {
 157                                 write_nic_dword(dev, WCAMI,
 158                                                 (u32)(*(KeyContent+i-2)));
 159                                 write_nic_dword(dev, RWCAM, TargetCommand);
 160                                 udelay(100);
 161                         }
 162                 }
 163         }
 164         RT_TRACE(COMP_SEC, "=========>after set key, usconfig:%x\n", usConfig);
 165 }
 166
 167 void CAM_read_entry(struct net_device *dev, u32 iIndex)
 168 {
 169         u32 target_command = 0;
 170         u32 target_content = 0;
 171         u8 entry_i = 0;
 172         u32 ulStatus;
 173         s32 i = 100;
 174         for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
 175                 target_command = entry_i+CAM_CONTENT_COUNT*iIndex;
 176                 target_command = target_command | BIT31;
 177
 178                 while ((i--) >= 0) {
 179                         ulStatus = read_nic_dword(dev, RWCAM);
 180                         if (ulStatus & BIT31)
 181                                 continue;
 182                         else
 183                                 break;
 184                 }
 185                 write_nic_dword(dev, RWCAM, target_command);
 186                 RT_TRACE(COMP_SEC, "CAM_read_entry(): WRITE A0: %x\n",
 187                          target_command);
 188                 target_content = read_nic_dword(dev, RCAMO);
 189                 RT_TRACE(COMP_SEC, "CAM_read_entry(): WRITE A8: %x\n",
 190                          target_content);
 191         }
 192         printk(KERN_INFO "\n");
 193 }
 194
 195 void CamRestoreAllEntry(struct net_device *dev)
 196 {
 197         u8 EntryId = 0;
 198         struct r8192_priv *priv = rtllib_priv(dev);
 199         u8 *MacAddr = priv->rtllib->current_network.bssid;
 200
 201         static u8       CAM_CONST_ADDR[4][6] = {
 202                 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
 203                 {0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
 204                 {0x00, 0x00, 0x00, 0x00, 0x00, 0x02},
 205                 {0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
 206         };
 207         static u8       CAM_CONST_BROAD[] = {
 208                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
 209         };
 210
 211         RT_TRACE(COMP_SEC, "CamRestoreAllEntry:\n");
 212
 213
 214         if ((priv->rtllib->pairwise_key_type == KEY_TYPE_WEP40) ||
 215             (priv->rtllib->pairwise_key_type == KEY_TYPE_WEP104)) {
 216
 217                 for (EntryId = 0; EntryId < 4; EntryId++) {
 218                         MacAddr = CAM_CONST_ADDR[EntryId];
 219                         if (priv->rtllib->swcamtable[EntryId].bused) {
 220                                 setKey(dev, EntryId , EntryId,
 221                                        priv->rtllib->pairwise_key_type, MacAddr,
 222                                        0, (u32 *)(&priv->rtllib->swcamtable
 223                                       [EntryId].key_buf[0]));
 224                         }
 225                 }
 226
 227         } else if (priv->rtllib->pairwise_key_type == KEY_TYPE_TKIP) {
 228                 if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 229                         setKey(dev, 4, 0, priv->rtllib->pairwise_key_type,
 230                                (u8 *)dev->dev_addr, 0,
 231                                (u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
 232                 } else {
 233                         setKey(dev, 4, 0, priv->rtllib->pairwise_key_type,
 234                                MacAddr, 0,
 235                                (u32 *)(&priv->rtllib->swcamtable[4].key_buf[0]));
 236                 }
 237
 238         } else if (priv->rtllib->pairwise_key_type == KEY_TYPE_CCMP) {
 239                 if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 240                         setKey(dev, 4, 0,
 241                                priv->rtllib->pairwise_key_type,
 242                                (u8 *)dev->dev_addr, 0,
 243                                (u32 *)(&priv->rtllib->swcamtable[4].
 244                                key_buf[0]));
 245                 } else {
 246                         setKey(dev, 4, 0,
 247                                priv->rtllib->pairwise_key_type, MacAddr,
 248                                0, (u32 *)(&priv->rtllib->swcamtable[4].
 249                                key_buf[0]));
 250                         }
 251         }
 252
 253         if (priv->rtllib->group_key_type == KEY_TYPE_TKIP) {
 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                                      );
 271                         } else {
 272                                 RT_TRACE(COMP_ERR, "===>%s():ERR!! ADHOC TKIP "
 273                                          ",but 0 entry is have no data\n",
 274                                          __func__);
 275                                 return;
 276                         }
 277                 }
 278         } else if (priv->rtllib->group_key_type == KEY_TYPE_CCMP) {
 279                 MacAddr = CAM_CONST_BROAD;
 280                 for (EntryId = 1; EntryId < 4; EntryId++) {
 281                         if (priv->rtllib->swcamtable[EntryId].bused) {
 282                                 setKey(dev, EntryId , EntryId,
 283                                        priv->rtllib->group_key_type,
 284                                        MacAddr, 0,
 285                                        (u32 *)(&priv->rtllib->swcamtable[EntryId].key_buf[0]));
 286                         }
 287                 }
 288
 289                 if (priv->rtllib->iw_mode == IW_MODE_ADHOC) {
 290                         if (priv->rtllib->swcamtable[0].bused) {
 291                                 setKey(dev, 0 , 0,
 292                                         priv->rtllib->group_key_type,
 293                                         CAM_CONST_ADDR[0], 0,
 294                                         (u32 *)(&priv->rtllib->swcamtable[0].key_buf[0]));
 295                         } else {
 296                                 RT_TRACE(COMP_ERR, "===>%s():ERR!! ADHOC CCMP ,"
 297                                          "but 0 entry is have no data\n",
 298                                          __func__);
 299                                 return;
 300                         }
 301                 }
 302         }
 303 }