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
  53         pDot11dInfo->bEnabled = false;
  54
  55         pDot11dInfo->State = DOT11D_STATE_NONE;
  56         pDot11dInfo->CountryIeLen = 0;
  57         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
  58         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
  59         RESET_CIE_WATCHDOG(ieee);
  60
  61 }
  62 EXPORT_SYMBOL(dot11d_init);
  63
  64 void Dot11d_Channelmap(u8 channel_plan, struct rtllib_device *ieee)
  65 {
  66         int i, max_chan = 14, min_chan = 1;
  67
  68         ieee->bGlobalDomain = false;
  69
  70         if (ChannelPlan[channel_plan].Len != 0) {
  71                 memset(GET_DOT11D_INFO(ieee)->channel_map, 0,
  72                        sizeof(GET_DOT11D_INFO(ieee)->channel_map));
  73                 for (i = 0; i < ChannelPlan[channel_plan].Len; i++) {
  74                         if (ChannelPlan[channel_plan].Channel[i] < min_chan ||
  75                             ChannelPlan[channel_plan].Channel[i] > max_chan)
  76                                 break;
  77                         GET_DOT11D_INFO(ieee)->channel_map[ChannelPlan
  78                                         [channel_plan].Channel[i]] = 1;
  79                 }
  80         }
  81
  82         switch (channel_plan) {
  83         case COUNTRY_CODE_GLOBAL_DOMAIN:
  84                 ieee->bGlobalDomain = true;
  85                 for (i = 12; i <= 14; i++)
  86                         GET_DOT11D_INFO(ieee)->channel_map[i] = 2;
  87                 ieee->IbssStartChnl = 10;
  88                 ieee->ibss_maxjoin_chal = 11;
  89                 break;
  90
  91         case COUNTRY_CODE_WORLD_WIDE_13:
  92                 for (i = 12; i <= 13; i++)
  93                         GET_DOT11D_INFO(ieee)->channel_map[i] = 2;
  94                 ieee->IbssStartChnl = 10;
  95                 ieee->ibss_maxjoin_chal = 11;
  96                 break;
  97
  98         default:
  99                 ieee->IbssStartChnl = 1;
 100                 ieee->ibss_maxjoin_chal = 14;
 101                 break;
 102         }
 103 }
 104 EXPORT_SYMBOL(Dot11d_Channelmap);
 105
 106
 107 void Dot11d_Reset(struct rtllib_device *ieee)
 108 {
 109         struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(ieee);
 110         u32 i;
 111
 112         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
 113         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
 114         for (i = 1; i <= 11; i++)
 115                 (pDot11dInfo->channel_map)[i] = 1;
 116         for (i = 12; i <= 14; i++)
 117                 (pDot11dInfo->channel_map)[i] = 2;
 118         pDot11dInfo->State = DOT11D_STATE_NONE;
 119         pDot11dInfo->CountryIeLen = 0;
 120         RESET_CIE_WATCHDOG(ieee);
 121 }
 122
 123 void Dot11d_UpdateCountryIe(struct rtllib_device *dev, u8 *pTaddr,
 124                             u16 CoutryIeLen, u8 *pCoutryIe)
 125 {
 126         struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(dev);
 127         u8 i, j, NumTriples, MaxChnlNum;
 128         struct chnl_txpow_triple *pTriple;
 129
 130         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
 131         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
 132         MaxChnlNum = 0;
 133         NumTriples = (CoutryIeLen - 3) / 3;
 134         pTriple = (struct chnl_txpow_triple *)(pCoutryIe + 3);
 135         for (i = 0; i < NumTriples; i++) {
 136                 if (MaxChnlNum >= pTriple->FirstChnl) {
 137                         netdev_info(dev->dev, "Dot11d_UpdateCountryIe(): Invalid country IE, skip it........1\n");
 138                         return;
 139                 }
 140                 if (MAX_CHANNEL_NUMBER < (pTriple->FirstChnl +
 141                     pTriple->NumChnls)) {
 142                         netdev_info(dev->dev, "Dot11d_UpdateCountryIe(): Invalid country IE, skip it........2\n");
 143                         return;
 144                 }
 145
 146                 for (j = 0; j < pTriple->NumChnls; j++) {
 147                         pDot11dInfo->channel_map[pTriple->FirstChnl + j] = 1;
 148                         pDot11dInfo->MaxTxPwrDbmList[pTriple->FirstChnl + j] =
 149                                                  pTriple->MaxTxPowerInDbm;
 150                         MaxChnlNum = pTriple->FirstChnl + j;
 151                 }
 152
 153                 pTriple = (struct chnl_txpow_triple *)((u8 *)pTriple + 3);
 154         }
 155
 156         UPDATE_CIE_SRC(dev, pTaddr);
 157
 158         pDot11dInfo->CountryIeLen = CoutryIeLen;
 159         memcpy(pDot11dInfo->CountryIeBuf, pCoutryIe, CoutryIeLen);
 160         pDot11dInfo->State = DOT11D_STATE_LEARNED;
 161 }
 162
 163 u8 DOT11D_GetMaxTxPwrInDbm(struct rtllib_device *dev, u8 Channel)
 164 {
 165         struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(dev);
 166         u8 MaxTxPwrInDbm = 255;
 167
 168         if (MAX_CHANNEL_NUMBER < Channel) {
 169                 netdev_info(dev->dev, "DOT11D_GetMaxTxPwrInDbm(): Invalid 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                 netdev_err(dev->dev, "%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 }