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(u8 index, u8 ht_info)
  79 {
  80         u16 mcs_rate[4][8] = {
  81                 {0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e}
  82         ,                       /* LG 40M */
  83         {0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c}
  84         ,                       /* SG 40M */
  85         {0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82}
  86         ,                       /* LG 20M */
  87         {0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90}
  88         };                      /* SG 20M */
  89
  90         u32 rate;
  91
  92         if (ht_info & BIT(0)) {
  93                 if (index == MWIFIEX_RATE_BITMAP_MCS0) {
  94                         if (ht_info & BIT(2))
  95                                 rate = 0x0D;    /* MCS 32 SGI rate */
  96                         else
  97                                 rate = 0x0C;    /* MCS 32 LGI rate */
  98                 } else if (index < 8) {
  99                         if (ht_info & BIT(1)) {
 100                                 if (ht_info & BIT(2))
 101                                         /* SGI, 40M */
 102                                         rate = mcs_rate[1][index];
 103                                 else
 104                                         /* LGI, 40M */
 105                                         rate = mcs_rate[0][index];
 106                         } else {
 107                                 if (ht_info & BIT(2))
 108                                         /* SGI, 20M */
 109                                         rate = mcs_rate[3][index];
 110                                 else
 111                                         /* LGI, 20M */
 112                                         rate = mcs_rate[2][index];
 113                         }
 114                 } else
 115                         rate = mwifiex_data_rates[0];
 116         } else {
 117                 if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
 118                         index = 0;
 119                 rate = mwifiex_data_rates[index];
 120         }
 121         return rate;
 122 }
 123
 124 /*
 125  * This function maps a data rate value into corresponding index in supported
 126  * rates table.
 127  */
 128 u8 mwifiex_data_rate_to_index(u32 rate)
 129 {
 130         u16 *ptr;
 131
 132         if (rate) {
 133                 ptr = memchr(mwifiex_data_rates, rate,
 134                                 sizeof(mwifiex_data_rates));
 135                 if (ptr)
 136                         return (u8) (ptr - mwifiex_data_rates);
 137         }
 138         return 0;
 139 }
 140
 141 /*
 142  * This function returns the current active data rates.
 143  *
 144  * The result may vary depending upon connection status.
 145  */
 146 u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
 147 {
 148         if (!priv->media_connected)
 149                 return mwifiex_get_supported_rates(priv, rates);
 150         else
 151                 return mwifiex_copy_rates(rates, 0,
 152                                        priv->curr_bss_params.data_rates,
 153                                        priv->curr_bss_params.num_of_rates);
 154 }
 155
 156 /*
 157  * This function locates the Channel-Frequency-Power triplet based upon
 158  * band and channel parameters.
 159  */
 160 struct mwifiex_chan_freq_power *
 161 mwifiex_get_cfp_by_band_and_channel_from_cfg80211(struct mwifiex_private
 162                                                   *priv, u8 band, u16 channel)
 163 {
 164         struct mwifiex_chan_freq_power *cfp = NULL;
 165         struct ieee80211_supported_band *sband;
 166         struct ieee80211_channel *ch;
 167         int i;
 168
 169         if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 170                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 171         else
 172                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
 173
 174         if (!sband) {
 175                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 176                                 " & channel %d\n", __func__, band, channel);
 177                 return cfp;
 178         }
 179
 180         for (i = 0; i < sband->n_channels; i++) {
 181                 ch = &sband->channels[i];
 182                 if (((ch->hw_value == channel) ||
 183                         (channel == FIRST_VALID_CHANNEL))
 184                         && !(ch->flags & IEEE80211_CHAN_DISABLED)) {
 185                         priv->cfp.channel = channel;
 186                         priv->cfp.freq = ch->center_freq;
 187                         priv->cfp.max_tx_power = ch->max_power;
 188                         cfp = &priv->cfp;
 189                         break;
 190                 }
 191         }
 192         if (i == sband->n_channels)
 193                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 194                                 " & channel %d\n", __func__, band, channel);
 195
 196         return cfp;
 197 }
 198
 199 /*
 200  * This function locates the Channel-Frequency-Power triplet based upon
 201  * band and frequency parameters.
 202  */
 203 struct mwifiex_chan_freq_power *
 204 mwifiex_get_cfp_by_band_and_freq_from_cfg80211(struct mwifiex_private *priv,
 205                                                u8 band, u32 freq)
 206 {
 207         struct mwifiex_chan_freq_power *cfp = NULL;
 208         struct ieee80211_supported_band *sband;
 209         struct ieee80211_channel *ch;
 210         int i;
 211
 212         if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 213                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 214         else
 215                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
 216
 217         if (!sband) {
 218                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 219                                 " & freq %d\n", __func__, band, freq);
 220                 return cfp;
 221         }
 222
 223         for (i = 0; i < sband->n_channels; i++) {
 224                 ch = &sband->channels[i];
 225                 if ((ch->center_freq == freq) &&
 226                         !(ch->flags & IEEE80211_CHAN_DISABLED)) {
 227                         priv->cfp.channel = ch->hw_value;
 228                         priv->cfp.freq = freq;
 229                         priv->cfp.max_tx_power = ch->max_power;
 230                         cfp = &priv->cfp;
 231                         break;
 232                 }
 233         }
 234         if (i == sband->n_channels)
 235                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 236                                 " & freq %d\n", __func__, band, freq);
 237
 238         return cfp;
 239 }
 240
 241 /*
 242  * This function checks if the data rate is set to auto.
 243  */
 244 u8
 245 mwifiex_is_rate_auto(struct mwifiex_private *priv)
 246 {
 247         u32 i;
 248         int rate_num = 0;
 249
 250         for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
 251                 if (priv->bitmap_rates[i])
 252                         rate_num++;
 253
 254         if (rate_num > 1)
 255                 return true;
 256         else
 257                 return false;
 258 }
 259
 260 /*
 261  * This function converts rate bitmap into rate index.
 262  */
 263 int mwifiex_get_rate_index(u16 *rate_bitmap, int size)
 264 {
 265         int i;
 266
 267         for (i = 0; i < size * 8; i++)
 268                 if (rate_bitmap[i / 16] & (1 << (i % 16)))
 269                         return i;
 270
 271         return 0;
 272 }
 273
 274 /*
 275  * This function gets the supported data rates.
 276  *
 277  * The function works in both Ad-Hoc and infra mode by printing the
 278  * band and returning the data rates.
 279  */
 280 u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
 281 {
 282         u32 k = 0;
 283         struct mwifiex_adapter *adapter = priv->adapter;
 284         if (priv->bss_mode == NL80211_IFTYPE_STATION) {
 285                 switch (adapter->config_bands) {
 286                 case BAND_B:
 287                         dev_dbg(adapter->dev, "info: infra band=%d "
 288                                 "supported_rates_b\n", adapter->config_bands);
 289                         k = mwifiex_copy_rates(rates, k, supported_rates_b,
 290                                                sizeof(supported_rates_b));
 291                         break;
 292                 case BAND_G:
 293                 case BAND_G | BAND_GN:
 294                         dev_dbg(adapter->dev, "info: infra band=%d "
 295                                 "supported_rates_g\n", adapter->config_bands);
 296                         k = mwifiex_copy_rates(rates, k, supported_rates_g,
 297                                                sizeof(supported_rates_g));
 298                         break;
 299                 case BAND_B | BAND_G:
 300                 case BAND_A | BAND_B | BAND_G:
 301                 case BAND_A | BAND_B:
 302                 case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
 303                 case BAND_B | BAND_G | BAND_GN:
 304                         dev_dbg(adapter->dev, "info: infra band=%d "
 305                                 "supported_rates_bg\n", adapter->config_bands);
 306                         k = mwifiex_copy_rates(rates, k, supported_rates_bg,
 307                                                sizeof(supported_rates_bg));
 308                         break;
 309                 case BAND_A:
 310                 case BAND_A | BAND_G:
 311                         dev_dbg(adapter->dev, "info: infra band=%d "
 312                                 "supported_rates_a\n", adapter->config_bands);
 313                         k = mwifiex_copy_rates(rates, k, supported_rates_a,
 314                                                sizeof(supported_rates_a));
 315                         break;
 316                 case BAND_A | BAND_AN:
 317                 case BAND_A | BAND_G | BAND_AN | BAND_GN:
 318                         dev_dbg(adapter->dev, "info: infra band=%d "
 319                                 "supported_rates_a\n", adapter->config_bands);
 320                         k = mwifiex_copy_rates(rates, k, supported_rates_a,
 321                                                sizeof(supported_rates_a));
 322                         break;
 323                 case BAND_GN:
 324                         dev_dbg(adapter->dev, "info: infra band=%d "
 325                                 "supported_rates_n\n", adapter->config_bands);
 326                         k = mwifiex_copy_rates(rates, k, supported_rates_n,
 327                                                sizeof(supported_rates_n));
 328                         break;
 329                 }
 330         } else {
 331                 /* Ad-hoc mode */
 332                 switch (adapter->adhoc_start_band) {
 333                 case BAND_B:
 334                         dev_dbg(adapter->dev, "info: adhoc B\n");
 335                         k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
 336                                                sizeof(adhoc_rates_b));
 337                         break;
 338                 case BAND_G:
 339                 case BAND_G | BAND_GN:
 340                         dev_dbg(adapter->dev, "info: adhoc G only\n");
 341                         k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
 342                                                sizeof(adhoc_rates_g));
 343                         break;
 344                 case BAND_B | BAND_G:
 345                 case BAND_B | BAND_G | BAND_GN:
 346                         dev_dbg(adapter->dev, "info: adhoc BG\n");
 347                         k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
 348                                                sizeof(adhoc_rates_bg));
 349                         break;
 350                 case BAND_A:
 351                 case BAND_A | BAND_AN:
 352                         dev_dbg(adapter->dev, "info: adhoc A\n");
 353                         k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
 354                                                sizeof(adhoc_rates_a));
 355                         break;
 356                 }
 357         }
 358
 359         return k;
 360 }