drivers/net/wireless/mwifiex/cfp.c

   1 /*
   2  * Marvell Wireless LAN device driver: Channel, Frequence and Power
   3  *
   4  * Copyright (C) 2011, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "cfg80211.h"
  26
  27 /* 100mW */
  28 #define MWIFIEX_TX_PWR_DEFAULT     20
  29 /* 100mW */
  30 #define MWIFIEX_TX_PWR_US_DEFAULT      20
  31 /* 50mW */
  32 #define MWIFIEX_TX_PWR_JP_DEFAULT      16
  33 /* 100mW */
  34 #define MWIFIEX_TX_PWR_FR_100MW        20
  35 /* 10mW */
  36 #define MWIFIEX_TX_PWR_FR_10MW         10
  37 /* 100mW */
  38 #define MWIFIEX_TX_PWR_EMEA_DEFAULT    20
  39
  40 static u8 adhoc_rates_b[B_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96, 0 };
  41
  42 static u8 adhoc_rates_g[G_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
  43                                                0xb0, 0x48, 0x60, 0x6c, 0 };
  44
  45 static u8 adhoc_rates_bg[BG_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96,
  46                                                  0x0c, 0x12, 0x18, 0x24,
  47                                                  0x30, 0x48, 0x60, 0x6c, 0 };
  48
  49 static u8 adhoc_rates_a[A_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
  50                                                0xb0, 0x48, 0x60, 0x6c, 0 };
  51 static u8 supported_rates_a[A_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
  52                                         0xb0, 0x48, 0x60, 0x6c, 0 };
  53 static u16 mwifiex_data_rates[MWIFIEX_SUPPORTED_RATES_EXT] = { 0x02, 0x04,
  54                                         0x0B, 0x16, 0x00, 0x0C, 0x12, 0x18,
  55                                         0x24, 0x30, 0x48, 0x60, 0x6C, 0x90,
  56                                         0x0D, 0x1A, 0x27, 0x34, 0x4E, 0x68,
  57                                         0x75, 0x82, 0x0C, 0x1B, 0x36, 0x51,
  58                                         0x6C, 0xA2, 0xD8, 0xF3, 0x10E, 0x00 };
  59
  60 static u8 supported_rates_b[B_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x16, 0 };
  61
  62 static u8 supported_rates_g[G_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
  63                                         0x30, 0x48, 0x60, 0x6c, 0 };
  64
  65 static u8 supported_rates_bg[BG_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x0c,
  66                                         0x12, 0x16, 0x18, 0x24, 0x30, 0x48,
  67                                         0x60, 0x6c, 0 };
  68
  69 u16 region_code_index[MWIFIEX_MAX_REGION_CODE] = { 0x10, 0x20, 0x30,
  70                                                 0x32, 0x40, 0x41, 0xff };
  71
  72 static u8 supported_rates_n[N_SUPPORTED_RATES] = { 0x02, 0x04, 0 };
  73
  74 /*
  75  * This function maps an index in supported rates table into
  76  * the corresponding data rate.
  77  */
  78 u32 mwifiex_index_to_data_rate(struct mwifiex_private *priv, u8 index,
  79                                                         u8 ht_info)
  80 {
  81         /*
  82          * For every mcs_rate line, the first 8 bytes are for stream 1x1,
  83          * and all 16 bytes are for stream 2x2.
  84          */
  85         u16  mcs_rate[4][16] = {
  86                 /* LGI 40M */
  87                 { 0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e,
  88                   0x36, 0x6c, 0xa2, 0xd8, 0x144, 0x1b0, 0x1e6, 0x21c },
  89
  90                 /* SGI 40M */
  91                 { 0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c,
  92                   0x3c, 0x78, 0xb4, 0xf0, 0x168, 0x1e0, 0x21c, 0x258 },
  93
  94                 /* LGI 20M */
  95                 { 0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82,
  96                   0x1a, 0x34, 0x4e, 0x68, 0x9c, 0xd0, 0xea, 0x104 },
  97
  98                 /* SGI 20M */
  99                 { 0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90,
 100                   0x1c, 0x39, 0x56, 0x73, 0xad, 0xe7, 0x104, 0x120 }
 101         };
 102         u32 mcs_num_supp =
 103                 (priv->adapter->hw_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
 104         u32 rate;
 105
 106         if (ht_info & BIT(0)) {
 107                 if (index == MWIFIEX_RATE_BITMAP_MCS0) {
 108                         if (ht_info & BIT(2))
 109                                 rate = 0x0D;    /* MCS 32 SGI rate */
 110                         else
 111                                 rate = 0x0C;    /* MCS 32 LGI rate */
 112                 } else if (index < mcs_num_supp) {
 113                         if (ht_info & BIT(1)) {
 114                                 if (ht_info & BIT(2))
 115                                         /* SGI, 40M */
 116                                         rate = mcs_rate[1][index];
 117                                 else
 118                                         /* LGI, 40M */
 119                                         rate = mcs_rate[0][index];
 120                         } else {
 121                                 if (ht_info & BIT(2))
 122                                         /* SGI, 20M */
 123                                         rate = mcs_rate[3][index];
 124                                 else
 125                                         /* LGI, 20M */
 126                                         rate = mcs_rate[2][index];
 127                         }
 128                 } else
 129                         rate = mwifiex_data_rates[0];
 130         } else {
 131                 if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
 132                         index = 0;
 133                 rate = mwifiex_data_rates[index];
 134         }
 135         return rate;
 136 }
 137
 138 /*
 139  * This function maps a data rate value into corresponding index in supported
 140  * rates table.
 141  */
 142 u8 mwifiex_data_rate_to_index(u32 rate)
 143 {
 144         u16 *ptr;
 145
 146         if (rate) {
 147                 ptr = memchr(mwifiex_data_rates, rate,
 148                                 sizeof(mwifiex_data_rates));
 149                 if (ptr)
 150                         return (u8) (ptr - mwifiex_data_rates);
 151         }
 152         return 0;
 153 }
 154
 155 /*
 156  * This function returns the current active data rates.
 157  *
 158  * The result may vary depending upon connection status.
 159  */
 160 u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
 161 {
 162         if (!priv->media_connected)
 163                 return mwifiex_get_supported_rates(priv, rates);
 164         else
 165                 return mwifiex_copy_rates(rates, 0,
 166                                        priv->curr_bss_params.data_rates,
 167                                        priv->curr_bss_params.num_of_rates);
 168 }
 169
 170 /*
 171  * This function locates the Channel-Frequency-Power triplet based upon
 172  * band and channel parameters.
 173  */
 174 struct mwifiex_chan_freq_power *
 175 mwifiex_get_cfp_by_band_and_channel_from_cfg80211(struct mwifiex_private
 176                                                   *priv, u8 band, u16 channel)
 177 {
 178         struct mwifiex_chan_freq_power *cfp = NULL;
 179         struct ieee80211_supported_band *sband;
 180         struct ieee80211_channel *ch;
 181         int i;
 182
 183         if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 184                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 185         else
 186                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
 187
 188         if (!sband) {
 189                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 190                                 " & channel %d\n", __func__, band, channel);
 191                 return cfp;
 192         }
 193
 194         for (i = 0; i < sband->n_channels; i++) {
 195                 ch = &sband->channels[i];
 196                 if (((ch->hw_value == channel) ||
 197                         (channel == FIRST_VALID_CHANNEL))
 198                         && !(ch->flags & IEEE80211_CHAN_DISABLED)) {
 199                         priv->cfp.channel = channel;
 200                         priv->cfp.freq = ch->center_freq;
 201                         priv->cfp.max_tx_power = ch->max_power;
 202                         cfp = &priv->cfp;
 203                         break;
 204                 }
 205         }
 206         if (i == sband->n_channels)
 207                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 208                                 " & channel %d\n", __func__, band, channel);
 209
 210         return cfp;
 211 }
 212
 213 /*
 214  * This function locates the Channel-Frequency-Power triplet based upon
 215  * band and frequency parameters.
 216  */
 217 struct mwifiex_chan_freq_power *
 218 mwifiex_get_cfp_by_band_and_freq_from_cfg80211(struct mwifiex_private *priv,
 219                                                u8 band, u32 freq)
 220 {
 221         struct mwifiex_chan_freq_power *cfp = NULL;
 222         struct ieee80211_supported_band *sband;
 223         struct ieee80211_channel *ch;
 224         int i;
 225
 226         if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 227                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 228         else
 229                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
 230
 231         if (!sband) {
 232                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 233                                 " & freq %d\n", __func__, band, freq);
 234                 return cfp;
 235         }
 236
 237         for (i = 0; i < sband->n_channels; i++) {
 238                 ch = &sband->channels[i];
 239                 if ((ch->center_freq == freq) &&
 240                         !(ch->flags & IEEE80211_CHAN_DISABLED)) {
 241                         priv->cfp.channel = ch->hw_value;
 242                         priv->cfp.freq = freq;
 243                         priv->cfp.max_tx_power = ch->max_power;
 244                         cfp = &priv->cfp;
 245                         break;
 246                 }
 247         }
 248         if (i == sband->n_channels)
 249                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 250                                 " & freq %d\n", __func__, band, freq);
 251
 252         return cfp;
 253 }
 254
 255 /*
 256  * This function checks if the data rate is set to auto.
 257  */
 258 u8
 259 mwifiex_is_rate_auto(struct mwifiex_private *priv)
 260 {
 261         u32 i;
 262         int rate_num = 0;
 263
 264         for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
 265                 if (priv->bitmap_rates[i])
 266                         rate_num++;
 267
 268         if (rate_num > 1)
 269                 return true;
 270         else
 271                 return false;
 272 }
 273
 274 /*
 275  * This function converts rate bitmap into rate index.
 276  */
 277 int mwifiex_get_rate_index(u16 *rate_bitmap, int size)
 278 {
 279         int i;
 280
 281         for (i = 0; i < size * 8; i++)
 282                 if (rate_bitmap[i / 16] & (1 << (i % 16)))
 283                         return i;
 284
 285         return 0;
 286 }
 287
 288 /*
 289  * This function gets the supported data rates.
 290  *
 291  * The function works in both Ad-Hoc and infra mode by printing the
 292  * band and returning the data rates.
 293  */
 294 u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
 295 {
 296         u32 k = 0;
 297         struct mwifiex_adapter *adapter = priv->adapter;
 298         if (priv->bss_mode == NL80211_IFTYPE_STATION) {
 299                 switch (adapter->config_bands) {
 300                 case BAND_B:
 301                         dev_dbg(adapter->dev, "info: infra band=%d "
 302                                 "supported_rates_b\n", adapter->config_bands);
 303                         k = mwifiex_copy_rates(rates, k, supported_rates_b,
 304                                                sizeof(supported_rates_b));
 305                         break;
 306                 case BAND_G:
 307                 case BAND_G | BAND_GN:
 308                         dev_dbg(adapter->dev, "info: infra band=%d "
 309                                 "supported_rates_g\n", adapter->config_bands);
 310                         k = mwifiex_copy_rates(rates, k, supported_rates_g,
 311                                                sizeof(supported_rates_g));
 312                         break;
 313                 case BAND_B | BAND_G:
 314                 case BAND_A | BAND_B | BAND_G:
 315                 case BAND_A | BAND_B:
 316                 case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
 317                 case BAND_B | BAND_G | BAND_GN:
 318                         dev_dbg(adapter->dev, "info: infra band=%d "
 319                                 "supported_rates_bg\n", adapter->config_bands);
 320                         k = mwifiex_copy_rates(rates, k, supported_rates_bg,
 321                                                sizeof(supported_rates_bg));
 322                         break;
 323                 case BAND_A:
 324                 case BAND_A | BAND_G:
 325                         dev_dbg(adapter->dev, "info: infra band=%d "
 326                                 "supported_rates_a\n", adapter->config_bands);
 327                         k = mwifiex_copy_rates(rates, k, supported_rates_a,
 328                                                sizeof(supported_rates_a));
 329                         break;
 330                 case BAND_A | BAND_AN:
 331                 case BAND_A | BAND_G | BAND_AN | BAND_GN:
 332                         dev_dbg(adapter->dev, "info: infra band=%d "
 333                                 "supported_rates_a\n", adapter->config_bands);
 334                         k = mwifiex_copy_rates(rates, k, supported_rates_a,
 335                                                sizeof(supported_rates_a));
 336                         break;
 337                 case BAND_GN:
 338                         dev_dbg(adapter->dev, "info: infra band=%d "
 339                                 "supported_rates_n\n", adapter->config_bands);
 340                         k = mwifiex_copy_rates(rates, k, supported_rates_n,
 341                                                sizeof(supported_rates_n));
 342                         break;
 343                 }
 344         } else {
 345                 /* Ad-hoc mode */
 346                 switch (adapter->adhoc_start_band) {
 347                 case BAND_B:
 348                         dev_dbg(adapter->dev, "info: adhoc B\n");
 349                         k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
 350                                                sizeof(adhoc_rates_b));
 351                         break;
 352                 case BAND_G:
 353                 case BAND_G | BAND_GN:
 354                         dev_dbg(adapter->dev, "info: adhoc G only\n");
 355                         k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
 356                                                sizeof(adhoc_rates_g));
 357                         break;
 358                 case BAND_B | BAND_G:
 359                 case BAND_B | BAND_G | BAND_GN:
 360                         dev_dbg(adapter->dev, "info: adhoc BG\n");
 361                         k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
 362                                                sizeof(adhoc_rates_bg));
 363                         break;
 364                 case BAND_A:
 365                 case BAND_A | BAND_AN:
 366                         dev_dbg(adapter->dev, "info: adhoc A\n");
 367                         k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
 368                                                sizeof(adhoc_rates_a));
 369                         break;
 370                 }
 371         }
 372
 373         return k;
 374 }