drivers/staging/rtl8192e/dot11d.c

   1 /******************************************************************************
   2  * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
   3  *
   4  * This program is distributed in the hope that it will be useful, but WITHOUT
   5  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   6  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   7  * more details.
   8  *
   9  * You should have received a copy of the GNU General Public License along with
  10  * this program; if not, write to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  12  *
  13  * The full GNU General Public License is included in this distribution in the
  14  * file called LICENSE.
  15  *
  16  * Contact Information:
  17  * wlanfae <wlanfae@realtek.com>
  18 ******************************************************************************/
  19 #include "dot11d.h"
  20
  21 struct channel_list {
  22         u8      Channel[32];
  23         u8      Len;
  24 };
  25
  26 static struct channel_list ChannelPlan[] = {
  27         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 36, 40, 44, 48, 52, 56, 60, 64,
  28           149, 153, 157, 161, 165}, 24},
  29         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}, 11},
  30         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56,
  31           60, 64}, 21},
  32         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, 13},
  33         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, 13},
  34         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 36, 40, 44, 48, 52,
  35           56, 60, 64}, 22},
  36         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 36, 40, 44, 48, 52,
  37           56, 60, 64}, 22},
  38         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, 13},
  39         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 36, 40, 44, 48, 52,
  40           56, 60, 64}, 22},
  41         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 36, 40, 44, 48, 52,
  42          56, 60, 64}, 22},
  43         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}, 14},
  44         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, 13},
  45         {{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52,
  46           56, 60, 64}, 21}
  47 };
  48
  49 void Dot11d_Init(struct rtllib_device *ieee)
  50 {
  51         struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(ieee);
  52         pDot11dInfo->bEnabled = false;
  53
  54         pDot11dInfo->State = DOT11D_STATE_NONE;
  55         pDot11dInfo->CountryIeLen = 0;
  56         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
  57         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
  58         RESET_CIE_WATCHDOG(ieee);
  59
  60 }
  61
  62 void Dot11d_Channelmap(u8 channel_plan, struct rtllib_device *ieee)
  63 {
  64         int i, max_chan = 14, min_chan = 1;
  65
  66         ieee->bGlobalDomain = false;
  67
  68         if (ChannelPlan[channel_plan].Len != 0) {
  69                 memset(GET_DOT11D_INFO(ieee)->channel_map, 0,
  70                        sizeof(GET_DOT11D_INFO(ieee)->channel_map));
  71                 for (i = 0; i < ChannelPlan[channel_plan].Len; i++) {
  72                         if (ChannelPlan[channel_plan].Channel[i] < min_chan ||
  73                             ChannelPlan[channel_plan].Channel[i] > max_chan)
  74                                 break;
  75                         GET_DOT11D_INFO(ieee)->channel_map[ChannelPlan
  76                                         [channel_plan].Channel[i]] = 1;
  77                 }
  78         }
  79
  80         switch (channel_plan) {
  81         case COUNTRY_CODE_GLOBAL_DOMAIN:
  82                 ieee->bGlobalDomain = true;
  83                 for (i = 12; i <= 14; i++)
  84                         GET_DOT11D_INFO(ieee)->channel_map[i] = 2;
  85                 ieee->IbssStartChnl = 10;
  86                 ieee->ibss_maxjoin_chal = 11;
  87                 break;
  88
  89         case COUNTRY_CODE_WORLD_WIDE_13:
  90                 for (i = 12; i <= 13; i++)
  91                         GET_DOT11D_INFO(ieee)->channel_map[i] = 2;
  92                 ieee->IbssStartChnl = 10;
  93                 ieee->ibss_maxjoin_chal = 11;
  94                 break;
  95
  96         default:
  97                 ieee->IbssStartChnl = 1;
  98                 ieee->ibss_maxjoin_chal = 14;
  99                 break;
 100         }
 101 }
 102
 103
 104 void Dot11d_Reset(struct rtllib_device *ieee)
 105 {
 106         struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(ieee);
 107         u32 i;
 108
 109         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
 110         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
 111         for (i = 1; i <= 11; i++)
 112                 (pDot11dInfo->channel_map)[i] = 1;
 113         for (i = 12; i <= 14; i++)
 114                 (pDot11dInfo->channel_map)[i] = 2;
 115         pDot11dInfo->State = DOT11D_STATE_NONE;
 116         pDot11dInfo->CountryIeLen = 0;
 117         RESET_CIE_WATCHDOG(ieee);
 118 }
 119
 120 void Dot11d_UpdateCountryIe(struct rtllib_device *dev, u8 *pTaddr,
 121                             u16 CoutryIeLen, u8 *pCoutryIe)
 122 {
 123         struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(dev);
 124         u8 i, j, NumTriples, MaxChnlNum;
 125         struct chnl_txpow_triple *pTriple;
 126
 127         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
 128         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
 129         MaxChnlNum = 0;
 130         NumTriples = (CoutryIeLen - 3) / 3;
 131         pTriple = (struct chnl_txpow_triple *)(pCoutryIe + 3);
 132         for (i = 0; i < NumTriples; i++) {
 133                 if (MaxChnlNum >= pTriple->FirstChnl) {
 134                         printk(KERN_INFO "Dot11d_UpdateCountryIe(): Invalid"
 135                                " country IE, skip it........1\n");
 136                         return;
 137                 }
 138                 if (MAX_CHANNEL_NUMBER < (pTriple->FirstChnl +
 139                     pTriple->NumChnls)) {
 140                         printk(KERN_INFO "Dot11d_UpdateCountryIe(): Invalid "
 141                                "country IE, skip it........2\n");
 142                         return;
 143                 }
 144
 145                 for (j = 0 ; j < pTriple->NumChnls; j++) {
 146                         pDot11dInfo->channel_map[pTriple->FirstChnl + j] = 1;
 147                         pDot11dInfo->MaxTxPwrDbmList[pTriple->FirstChnl + j] =
 148                                                  pTriple->MaxTxPowerInDbm;
 149                         MaxChnlNum = pTriple->FirstChnl + j;
 150                 }
 151
 152                 pTriple = (struct chnl_txpow_triple *)((u8*)pTriple + 3);
 153         }
 154
 155         UPDATE_CIE_SRC(dev, pTaddr);
 156
 157         pDot11dInfo->CountryIeLen = CoutryIeLen;
 158         memcpy(pDot11dInfo->CountryIeBuf, pCoutryIe, CoutryIeLen);
 159         pDot11dInfo->State = DOT11D_STATE_LEARNED;
 160 }
 161
 162 u8 DOT11D_GetMaxTxPwrInDbm(struct rtllib_device *dev, u8 Channel)
 163 {
 164         struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(dev);
 165         u8 MaxTxPwrInDbm = 255;
 166
 167         if (MAX_CHANNEL_NUMBER < Channel) {
 168                 printk(KERN_INFO "DOT11D_GetMaxTxPwrInDbm(): Invalid "
 169                        "Channel\n");
 170                 return MaxTxPwrInDbm;
 171         }
 172         if (pDot11dInfo->channel_map[Channel])
 173                 MaxTxPwrInDbm = pDot11dInfo->MaxTxPwrDbmList[Channel];
 174
 175         return MaxTxPwrInDbm;
 176 }
 177
 178 void DOT11D_ScanComplete(struct rtllib_device *dev)
 179 {
 180         struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(dev);
 181
 182         switch (pDot11dInfo->State) {
 183         case DOT11D_STATE_LEARNED:
 184                 pDot11dInfo->State = DOT11D_STATE_DONE;
 185                 break;
 186         case DOT11D_STATE_DONE:
 187                 Dot11d_Reset(dev);
 188                 break;
 189         case DOT11D_STATE_NONE:
 190                 break;
 191         }
 192 }
 193
 194 int ToLegalChannel(struct rtllib_device *dev, u8 channel)
 195 {
 196         struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(dev);
 197         u8 default_chn = 0;
 198         u32 i;
 199
 200         for (i = 1; i <= MAX_CHANNEL_NUMBER; i++) {
 201                 if (pDot11dInfo->channel_map[i] > 0) {
 202                         default_chn = i;
 203                         break;
 204                 }
 205         }
 206
 207         if (MAX_CHANNEL_NUMBER < channel) {
 208                 printk(KERN_ERR "%s(): Invalid Channel\n", __func__);
 209                 return default_chn;
 210         }
 211
 212         if (pDot11dInfo->channel_map[channel] > 0)
 213                 return channel;
 214
 215         return default_chn;
 216 }