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 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 u8 supported_rates_b[B_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x16, 0 };
  61
  62 u8 supported_rates_g[G_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
  63                                         0x30, 0x48, 0x60, 0x6c, 0 };
  64
  65 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 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_adapter *adapter, u8 index,
  79                                u8 ht_info)
  80 {
  81         u16 mcs_rate[4][8] = {
  82                 {0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e}
  83         ,                       /* LG 40M */
  84         {0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c}
  85         ,                       /* SG 40M */
  86         {0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82}
  87         ,                       /* LG 20M */
  88         {0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90}
  89         };                      /* SG 20M */
  90
  91         u32 rate;
  92
  93         if (ht_info & BIT(0)) {
  94                 if (index == MWIFIEX_RATE_BITMAP_MCS0) {
  95                         if (ht_info & BIT(2))
  96                                 rate = 0x0D;    /* MCS 32 SGI rate */
  97                         else
  98                                 rate = 0x0C;    /* MCS 32 LGI rate */
  99                 } else if (index < 8) {
 100                         if (ht_info & BIT(1)) {
 101                                 if (ht_info & BIT(2))
 102                                         /* SGI, 40M */
 103                                         rate = mcs_rate[1][index];
 104                                 else
 105                                         /* LGI, 40M */
 106                                         rate = mcs_rate[0][index];
 107                         } else {
 108                                 if (ht_info & BIT(2))
 109                                         /* SGI, 20M */
 110                                         rate = mcs_rate[3][index];
 111                                 else
 112                                         /* LGI, 20M */
 113                                         rate = mcs_rate[2][index];
 114                         }
 115                 } else
 116                         rate = mwifiex_data_rates[0];
 117         } else {
 118                 if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
 119                         index = 0;
 120                 rate = mwifiex_data_rates[index];
 121         }
 122         return rate;
 123 }
 124
 125 /*
 126  * This function maps a data rate value into corresponding index in supported
 127  * rates table.
 128  */
 129 u8 mwifiex_data_rate_to_index(struct mwifiex_adapter *adapter, u32 rate)
 130 {
 131         u16 *ptr;
 132
 133         if (rate) {
 134                 ptr = memchr(mwifiex_data_rates, rate,
 135                                 sizeof(mwifiex_data_rates));
 136                 if (ptr)
 137                         return (u8) (ptr - mwifiex_data_rates);
 138         }
 139         return 0;
 140 }
 141
 142 /*
 143  * This function returns the current active data rates.
 144  *
 145  * The result may vary depending upon connection status.
 146  */
 147 u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
 148 {
 149         u32 k;
 150
 151         if (!priv->media_connected)
 152                 k = mwifiex_get_supported_rates(priv, rates);
 153         else
 154                 k = mwifiex_copy_rates(rates, 0,
 155                                        priv->curr_bss_params.data_rates,
 156                                        priv->curr_bss_params.num_of_rates);
 157
 158         return k;
 159 }
 160
 161 /*
 162  * This function locates the Channel-Frequency-Power triplet based upon
 163  * band and channel parameters.
 164  */
 165 struct mwifiex_chan_freq_power *
 166 mwifiex_get_cfp_by_band_and_channel_from_cfg80211(struct mwifiex_private
 167                                                   *priv, u8 band, u16 channel)
 168 {
 169         struct mwifiex_chan_freq_power *cfp = NULL;
 170         struct ieee80211_supported_band *sband;
 171         struct ieee80211_channel *ch;
 172         int i;
 173
 174         if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 175                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 176         else
 177                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
 178
 179         if (!sband) {
 180                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 181                                 " & channel %d\n", __func__, band, channel);
 182                 return cfp;
 183         }
 184
 185         for (i = 0; i < sband->n_channels; i++) {
 186                 ch = &sband->channels[i];
 187                 if (((ch->hw_value == channel) ||
 188                         (channel == FIRST_VALID_CHANNEL))
 189                         && !(ch->flags & IEEE80211_CHAN_DISABLED)) {
 190                         priv->cfp.channel = channel;
 191                         priv->cfp.freq = ch->center_freq;
 192                         priv->cfp.max_tx_power = ch->max_power;
 193                         cfp = &priv->cfp;
 194                         break;
 195                 }
 196         }
 197         if (i == sband->n_channels)
 198                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 199                                 " & channel %d\n", __func__, band, channel);
 200
 201         return cfp;
 202 }
 203
 204 /*
 205  * This function locates the Channel-Frequency-Power triplet based upon
 206  * band and frequency parameters.
 207  */
 208 struct mwifiex_chan_freq_power *
 209 mwifiex_get_cfp_by_band_and_freq_from_cfg80211(struct mwifiex_private *priv,
 210                                                u8 band, u32 freq)
 211 {
 212         struct mwifiex_chan_freq_power *cfp = NULL;
 213         struct ieee80211_supported_band *sband;
 214         struct ieee80211_channel *ch;
 215         int i;
 216
 217         if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 218                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 219         else
 220                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
 221
 222         if (!sband) {
 223                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 224                                 " & freq %d\n", __func__, band, freq);
 225                 return cfp;
 226         }
 227
 228         for (i = 0; i < sband->n_channels; i++) {
 229                 ch = &sband->channels[i];
 230                 if ((ch->center_freq == freq) &&
 231                         !(ch->flags & IEEE80211_CHAN_DISABLED)) {
 232                         priv->cfp.channel = ch->hw_value;
 233                         priv->cfp.freq = freq;
 234                         priv->cfp.max_tx_power = ch->max_power;
 235                         cfp = &priv->cfp;
 236                         break;
 237                 }
 238         }
 239         if (i == sband->n_channels)
 240                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 241                                 " & freq %d\n", __func__, band, freq);
 242
 243         return cfp;
 244 }
 245
 246 /*
 247  * This function checks if the data rate is set to auto.
 248  */
 249 u8
 250 mwifiex_is_rate_auto(struct mwifiex_private *priv)
 251 {
 252         u32 i;
 253         int rate_num = 0;
 254
 255         for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
 256                 if (priv->bitmap_rates[i])
 257                         rate_num++;
 258
 259         if (rate_num > 1)
 260                 return true;
 261         else
 262                 return false;
 263 }
 264
 265 /*
 266  * This function converts rate bitmap into rate index.
 267  */
 268 int
 269 mwifiex_get_rate_index(struct mwifiex_adapter *adapter, u16 *rate_bitmap,
 270                        int size)
 271 {
 272         int i;
 273
 274         for (i = 0; i < size * 8; i++)
 275                 if (rate_bitmap[i / 16] & (1 << (i % 16)))
 276                         return i;
 277
 278         return 0;
 279 }
 280
 281 /*
 282  * This function gets the supported data rates.
 283  *
 284  * The function works in both Ad-Hoc and infra mode by printing the
 285  * band and returning the data rates.
 286  */
 287 u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
 288 {
 289         u32 k = 0;
 290         struct mwifiex_adapter *adapter = priv->adapter;
 291         if (priv->bss_mode == MWIFIEX_BSS_MODE_INFRA) {
 292                 /* Infra. mode */
 293                 switch (adapter->config_bands) {
 294                 case BAND_B:
 295                         dev_dbg(adapter->dev, "info: infra band=%d "
 296                                 "supported_rates_b\n", adapter->config_bands);
 297                         k = mwifiex_copy_rates(rates, k, supported_rates_b,
 298                                                sizeof(supported_rates_b));
 299                         break;
 300                 case BAND_G:
 301                 case BAND_G | BAND_GN:
 302                         dev_dbg(adapter->dev, "info: infra band=%d "
 303                                 "supported_rates_g\n", adapter->config_bands);
 304                         k = mwifiex_copy_rates(rates, k, supported_rates_g,
 305                                                sizeof(supported_rates_g));
 306                         break;
 307                 case BAND_B | BAND_G:
 308                 case BAND_A | BAND_B | BAND_G:
 309                 case BAND_A | BAND_B:
 310                 case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
 311                 case BAND_B | BAND_G | BAND_GN:
 312                         dev_dbg(adapter->dev, "info: infra band=%d "
 313                                 "supported_rates_bg\n", adapter->config_bands);
 314                         k = mwifiex_copy_rates(rates, k, supported_rates_bg,
 315                                                sizeof(supported_rates_bg));
 316                         break;
 317                 case BAND_A:
 318                 case BAND_A | BAND_G:
 319                         dev_dbg(adapter->dev, "info: infra band=%d "
 320                                 "supported_rates_a\n", adapter->config_bands);
 321                         k = mwifiex_copy_rates(rates, k, supported_rates_a,
 322                                                sizeof(supported_rates_a));
 323                         break;
 324                 case BAND_A | BAND_AN:
 325                 case BAND_A | BAND_G | BAND_AN | BAND_GN:
 326                         dev_dbg(adapter->dev, "info: infra band=%d "
 327                                 "supported_rates_a\n", adapter->config_bands);
 328                         k = mwifiex_copy_rates(rates, k, supported_rates_a,
 329                                                sizeof(supported_rates_a));
 330                         break;
 331                 case BAND_GN:
 332                         dev_dbg(adapter->dev, "info: infra band=%d "
 333                                 "supported_rates_n\n", adapter->config_bands);
 334                         k = mwifiex_copy_rates(rates, k, supported_rates_n,
 335                                                sizeof(supported_rates_n));
 336                         break;
 337                 }
 338         } else {
 339                 /* Ad-hoc mode */
 340                 switch (adapter->adhoc_start_band) {
 341                 case BAND_B:
 342                         dev_dbg(adapter->dev, "info: adhoc B\n");
 343                         k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
 344                                                sizeof(adhoc_rates_b));
 345                         break;
 346                 case BAND_G:
 347                 case BAND_G | BAND_GN:
 348                         dev_dbg(adapter->dev, "info: adhoc G only\n");
 349                         k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
 350                                                sizeof(adhoc_rates_g));
 351                         break;
 352                 case BAND_B | BAND_G:
 353                 case BAND_B | BAND_G | BAND_GN:
 354                         dev_dbg(adapter->dev, "info: adhoc BG\n");
 355                         k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
 356                                                sizeof(adhoc_rates_bg));
 357                         break;
 358                 case BAND_A:
 359                 case BAND_A | BAND_AN:
 360                         dev_dbg(adapter->dev, "info: adhoc A\n");
 361                         k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
 362                                                sizeof(adhoc_rates_a));
 363                         break;
 364                 }
 365         }
 366
 367         return k;
 368 }