Root/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
21struct channel_list {
22    u8 Channel[32];
23    u8 Len;
24};
25
26static 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
49void 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}
61EXPORT_SYMBOL(dot11d_init);
62
63void Dot11d_Channelmap(u8 channel_plan, struct rtllib_device *ieee)
64{
65    int i, max_chan = 14, min_chan = 1;
66
67    ieee->bGlobalDomain = false;
68
69    if (ChannelPlan[channel_plan].Len != 0) {
70        memset(GET_DOT11D_INFO(ieee)->channel_map, 0,
71               sizeof(GET_DOT11D_INFO(ieee)->channel_map));
72        for (i = 0; i < ChannelPlan[channel_plan].Len; i++) {
73            if (ChannelPlan[channel_plan].Channel[i] < min_chan ||
74                ChannelPlan[channel_plan].Channel[i] > max_chan)
75                break;
76            GET_DOT11D_INFO(ieee)->channel_map[ChannelPlan
77                    [channel_plan].Channel[i]] = 1;
78        }
79    }
80
81    switch (channel_plan) {
82    case COUNTRY_CODE_GLOBAL_DOMAIN:
83        ieee->bGlobalDomain = true;
84        for (i = 12; i <= 14; i++)
85            GET_DOT11D_INFO(ieee)->channel_map[i] = 2;
86        ieee->IbssStartChnl = 10;
87        ieee->ibss_maxjoin_chal = 11;
88        break;
89
90    case COUNTRY_CODE_WORLD_WIDE_13:
91        for (i = 12; i <= 13; i++)
92            GET_DOT11D_INFO(ieee)->channel_map[i] = 2;
93        ieee->IbssStartChnl = 10;
94        ieee->ibss_maxjoin_chal = 11;
95        break;
96
97    default:
98        ieee->IbssStartChnl = 1;
99        ieee->ibss_maxjoin_chal = 14;
100        break;
101    }
102}
103EXPORT_SYMBOL(Dot11d_Channelmap);
104
105
106void Dot11d_Reset(struct rtllib_device *ieee)
107{
108    struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(ieee);
109    u32 i;
110
111    memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
112    memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
113    for (i = 1; i <= 11; i++)
114        (pDot11dInfo->channel_map)[i] = 1;
115    for (i = 12; i <= 14; i++)
116        (pDot11dInfo->channel_map)[i] = 2;
117    pDot11dInfo->State = DOT11D_STATE_NONE;
118    pDot11dInfo->CountryIeLen = 0;
119    RESET_CIE_WATCHDOG(ieee);
120}
121
122void Dot11d_UpdateCountryIe(struct rtllib_device *dev, u8 *pTaddr,
123                u16 CoutryIeLen, u8 *pCoutryIe)
124{
125    struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(dev);
126    u8 i, j, NumTriples, MaxChnlNum;
127    struct chnl_txpow_triple *pTriple;
128
129    memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
130    memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
131    MaxChnlNum = 0;
132    NumTriples = (CoutryIeLen - 3) / 3;
133    pTriple = (struct chnl_txpow_triple *)(pCoutryIe + 3);
134    for (i = 0; i < NumTriples; i++) {
135        if (MaxChnlNum >= pTriple->FirstChnl) {
136            printk(KERN_INFO "Dot11d_UpdateCountryIe(): Invalid"
137                   " country IE, skip it........1\n");
138            return;
139        }
140        if (MAX_CHANNEL_NUMBER < (pTriple->FirstChnl +
141            pTriple->NumChnls)) {
142            printk(KERN_INFO "Dot11d_UpdateCountryIe(): Invalid "
143                   "country IE, skip it........2\n");
144            return;
145        }
146
147        for (j = 0 ; j < pTriple->NumChnls; j++) {
148            pDot11dInfo->channel_map[pTriple->FirstChnl + j] = 1;
149            pDot11dInfo->MaxTxPwrDbmList[pTriple->FirstChnl + j] =
150                         pTriple->MaxTxPowerInDbm;
151            MaxChnlNum = pTriple->FirstChnl + j;
152        }
153
154        pTriple = (struct chnl_txpow_triple *)((u8*)pTriple + 3);
155    }
156
157    UPDATE_CIE_SRC(dev, pTaddr);
158
159    pDot11dInfo->CountryIeLen = CoutryIeLen;
160    memcpy(pDot11dInfo->CountryIeBuf, pCoutryIe, CoutryIeLen);
161    pDot11dInfo->State = DOT11D_STATE_LEARNED;
162}
163
164u8 DOT11D_GetMaxTxPwrInDbm(struct rtllib_device *dev, u8 Channel)
165{
166    struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(dev);
167    u8 MaxTxPwrInDbm = 255;
168
169    if (MAX_CHANNEL_NUMBER < Channel) {
170        printk(KERN_INFO "DOT11D_GetMaxTxPwrInDbm(): Invalid "
171               "Channel\n");
172        return MaxTxPwrInDbm;
173    }
174    if (pDot11dInfo->channel_map[Channel])
175        MaxTxPwrInDbm = pDot11dInfo->MaxTxPwrDbmList[Channel];
176
177    return MaxTxPwrInDbm;
178}
179
180void DOT11D_ScanComplete(struct rtllib_device *dev)
181{
182    struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(dev);
183
184    switch (pDot11dInfo->State) {
185    case DOT11D_STATE_LEARNED:
186        pDot11dInfo->State = DOT11D_STATE_DONE;
187        break;
188    case DOT11D_STATE_DONE:
189        Dot11d_Reset(dev);
190        break;
191    case DOT11D_STATE_NONE:
192        break;
193    }
194}
195
196int ToLegalChannel(struct rtllib_device *dev, u8 channel)
197{
198    struct rt_dot11d_info *pDot11dInfo = GET_DOT11D_INFO(dev);
199    u8 default_chn = 0;
200    u32 i;
201
202    for (i = 1; i <= MAX_CHANNEL_NUMBER; i++) {
203        if (pDot11dInfo->channel_map[i] > 0) {
204            default_chn = i;
205            break;
206        }
207    }
208
209    if (MAX_CHANNEL_NUMBER < channel) {
210        printk(KERN_ERR "%s(): Invalid Channel\n", __func__);
211        return default_chn;
212    }
213
214    if (pDot11dInfo->channel_map[channel] > 0)
215        return channel;
216
217    return default_chn;
218}
219

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