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 struct region_code_mapping {
  75         u8 code;
  76         u8 region[IEEE80211_COUNTRY_STRING_LEN];
  77 };
  78
  79 static struct region_code_mapping region_code_mapping_t[] = {
  80         { 0x10, "US " }, /* US FCC */
  81         { 0x20, "CA " }, /* IC Canada */
  82         { 0x30, "EU " }, /* ETSI */
  83         { 0x31, "ES " }, /* Spain */
  84         { 0x32, "FR " }, /* France */
  85         { 0x40, "JP " }, /* Japan */
  86         { 0x41, "JP " }, /* Japan */
  87         { 0x50, "CN " }, /* China */
  88 };
  89
  90 /* This function converts integer code to region string */
  91 u8 *mwifiex_11d_code_2_region(u8 code)
  92 {
  93         u8 i;
  94         u8 size = sizeof(region_code_mapping_t)/
  95                                 sizeof(struct region_code_mapping);
  96
  97         /* Look for code in mapping table */
  98         for (i = 0; i < size; i++)
  99                 if (region_code_mapping_t[i].code == code)
 100                         return region_code_mapping_t[i].region;
 101
 102         return NULL;
 103 }
 104
 105 /*
 106  * This function maps an index in supported rates table into
 107  * the corresponding data rate.
 108  */
 109 u32 mwifiex_index_to_data_rate(struct mwifiex_private *priv, u8 index,
 110                                                         u8 ht_info)
 111 {
 112         /*
 113          * For every mcs_rate line, the first 8 bytes are for stream 1x1,
 114          * and all 16 bytes are for stream 2x2.
 115          */
 116         u16  mcs_rate[4][16] = {
 117                 /* LGI 40M */
 118                 { 0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e,
 119                   0x36, 0x6c, 0xa2, 0xd8, 0x144, 0x1b0, 0x1e6, 0x21c },
 120
 121                 /* SGI 40M */
 122                 { 0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c,
 123                   0x3c, 0x78, 0xb4, 0xf0, 0x168, 0x1e0, 0x21c, 0x258 },
 124
 125                 /* LGI 20M */
 126                 { 0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82,
 127                   0x1a, 0x34, 0x4e, 0x68, 0x9c, 0xd0, 0xea, 0x104 },
 128
 129                 /* SGI 20M */
 130                 { 0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90,
 131                   0x1c, 0x39, 0x56, 0x73, 0xad, 0xe7, 0x104, 0x120 }
 132         };
 133         u32 mcs_num_supp =
 134                 (priv->adapter->hw_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
 135         u32 rate;
 136
 137         if (ht_info & BIT(0)) {
 138                 if (index == MWIFIEX_RATE_BITMAP_MCS0) {
 139                         if (ht_info & BIT(2))
 140                                 rate = 0x0D;    /* MCS 32 SGI rate */
 141                         else
 142                                 rate = 0x0C;    /* MCS 32 LGI rate */
 143                 } else if (index < mcs_num_supp) {
 144                         if (ht_info & BIT(1)) {
 145                                 if (ht_info & BIT(2))
 146                                         /* SGI, 40M */
 147                                         rate = mcs_rate[1][index];
 148                                 else
 149                                         /* LGI, 40M */
 150                                         rate = mcs_rate[0][index];
 151                         } else {
 152                                 if (ht_info & BIT(2))
 153                                         /* SGI, 20M */
 154                                         rate = mcs_rate[3][index];
 155                                 else
 156                                         /* LGI, 20M */
 157                                         rate = mcs_rate[2][index];
 158                         }
 159                 } else
 160                         rate = mwifiex_data_rates[0];
 161         } else {
 162                 if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
 163                         index = 0;
 164                 rate = mwifiex_data_rates[index];
 165         }
 166         return rate;
 167 }
 168
 169 /*
 170  * This function maps a data rate value into corresponding index in supported
 171  * rates table.
 172  */
 173 u8 mwifiex_data_rate_to_index(u32 rate)
 174 {
 175         u16 *ptr;
 176
 177         if (rate) {
 178                 ptr = memchr(mwifiex_data_rates, rate,
 179                                 sizeof(mwifiex_data_rates));
 180                 if (ptr)
 181                         return (u8) (ptr - mwifiex_data_rates);
 182         }
 183         return 0;
 184 }
 185
 186 /*
 187  * This function returns the current active data rates.
 188  *
 189  * The result may vary depending upon connection status.
 190  */
 191 u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
 192 {
 193         if (!priv->media_connected)
 194                 return mwifiex_get_supported_rates(priv, rates);
 195         else
 196                 return mwifiex_copy_rates(rates, 0,
 197                                           priv->curr_bss_params.data_rates,
 198                                           priv->curr_bss_params.num_of_rates);
 199 }
 200
 201 /*
 202  * This function locates the Channel-Frequency-Power triplet based upon
 203  * band and channel/frequency parameters.
 204  */
 205 struct mwifiex_chan_freq_power *
 206 mwifiex_get_cfp(struct mwifiex_private *priv, u8 band, u16 channel, u32 freq)
 207 {
 208         struct mwifiex_chan_freq_power *cfp = NULL;
 209         struct ieee80211_supported_band *sband;
 210         struct ieee80211_channel *ch = NULL;
 211         int i;
 212
 213         if (!channel && !freq)
 214                 return cfp;
 215
 216         if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 217                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 218         else
 219                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
 220
 221         if (!sband) {
 222                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d\n",
 223                         __func__, band);
 224                 return cfp;
 225         }
 226
 227         for (i = 0; i < sband->n_channels; i++) {
 228                 ch = &sband->channels[i];
 229
 230                 if (ch->flags & IEEE80211_CHAN_DISABLED)
 231                         continue;
 232
 233                 if (freq) {
 234                         if (ch->center_freq == freq)
 235                                 break;
 236                 } else {
 237                         /* find by valid channel*/
 238                         if (ch->hw_value == channel ||
 239                             channel == FIRST_VALID_CHANNEL)
 240                                 break;
 241                 }
 242         }
 243         if (i == sband->n_channels) {
 244                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 245                         " & channel=%d freq=%d\n", __func__, band, channel,
 246                         freq);
 247         } else {
 248                 if (!ch)
 249                         return cfp;
 250
 251                 priv->cfp.channel = ch->hw_value;
 252                 priv->cfp.freq = ch->center_freq;
 253                 priv->cfp.max_tx_power = ch->max_power;
 254                 cfp = &priv->cfp;
 255         }
 256
 257         return cfp;
 258 }
 259
 260 /*
 261  * This function checks if the data rate is set to auto.
 262  */
 263 u8
 264 mwifiex_is_rate_auto(struct mwifiex_private *priv)
 265 {
 266         u32 i;
 267         int rate_num = 0;
 268
 269         for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
 270                 if (priv->bitmap_rates[i])
 271                         rate_num++;
 272
 273         if (rate_num > 1)
 274                 return true;
 275         else
 276                 return false;
 277 }
 278
 279 /*
 280  * This function converts rate bitmap into rate index.
 281  */
 282 int mwifiex_get_rate_index(u16 *rate_bitmap, int size)
 283 {
 284         int i;
 285
 286         for (i = 0; i < size * 8; i++)
 287                 if (rate_bitmap[i / 16] & (1 << (i % 16)))
 288                         return i;
 289
 290         return 0;
 291 }
 292
 293 /*
 294  * This function gets the supported data rates.
 295  *
 296  * The function works in both Ad-Hoc and infra mode by printing the
 297  * band and returning the data rates.
 298  */
 299 u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
 300 {
 301         u32 k = 0;
 302         struct mwifiex_adapter *adapter = priv->adapter;
 303         if (priv->bss_mode == NL80211_IFTYPE_STATION) {
 304                 switch (adapter->config_bands) {
 305                 case BAND_B:
 306                         dev_dbg(adapter->dev, "info: infra band=%d "
 307                                 "supported_rates_b\n", adapter->config_bands);
 308                         k = mwifiex_copy_rates(rates, k, supported_rates_b,
 309                                                sizeof(supported_rates_b));
 310                         break;
 311                 case BAND_G:
 312                 case BAND_G | BAND_GN:
 313                         dev_dbg(adapter->dev, "info: infra band=%d "
 314                                 "supported_rates_g\n", adapter->config_bands);
 315                         k = mwifiex_copy_rates(rates, k, supported_rates_g,
 316                                                sizeof(supported_rates_g));
 317                         break;
 318                 case BAND_B | BAND_G:
 319                 case BAND_A | BAND_B | BAND_G:
 320                 case BAND_A | BAND_B:
 321                 case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
 322                 case BAND_B | BAND_G | BAND_GN:
 323                         dev_dbg(adapter->dev, "info: infra band=%d "
 324                                 "supported_rates_bg\n", adapter->config_bands);
 325                         k = mwifiex_copy_rates(rates, k, supported_rates_bg,
 326                                                sizeof(supported_rates_bg));
 327                         break;
 328                 case BAND_A:
 329                 case BAND_A | BAND_G:
 330                         dev_dbg(adapter->dev, "info: infra band=%d "
 331                                 "supported_rates_a\n", adapter->config_bands);
 332                         k = mwifiex_copy_rates(rates, k, supported_rates_a,
 333                                                sizeof(supported_rates_a));
 334                         break;
 335                 case BAND_A | BAND_AN:
 336                 case BAND_A | BAND_G | BAND_AN | BAND_GN:
 337                         dev_dbg(adapter->dev, "info: infra band=%d "
 338                                 "supported_rates_a\n", adapter->config_bands);
 339                         k = mwifiex_copy_rates(rates, k, supported_rates_a,
 340                                                sizeof(supported_rates_a));
 341                         break;
 342                 case BAND_GN:
 343                         dev_dbg(adapter->dev, "info: infra band=%d "
 344                                 "supported_rates_n\n", adapter->config_bands);
 345                         k = mwifiex_copy_rates(rates, k, supported_rates_n,
 346                                                sizeof(supported_rates_n));
 347                         break;
 348                 }
 349         } else {
 350                 /* Ad-hoc mode */
 351                 switch (adapter->adhoc_start_band) {
 352                 case BAND_B:
 353                         dev_dbg(adapter->dev, "info: adhoc B\n");
 354                         k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
 355                                                sizeof(adhoc_rates_b));
 356                         break;
 357                 case BAND_G:
 358                 case BAND_G | BAND_GN:
 359                         dev_dbg(adapter->dev, "info: adhoc G only\n");
 360                         k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
 361                                                sizeof(adhoc_rates_g));
 362                         break;
 363                 case BAND_B | BAND_G:
 364                 case BAND_B | BAND_G | BAND_GN:
 365                         dev_dbg(adapter->dev, "info: adhoc BG\n");
 366                         k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
 367                                                sizeof(adhoc_rates_bg));
 368                         break;
 369                 case BAND_A:
 370                 case BAND_A | BAND_AN:
 371                         dev_dbg(adapter->dev, "info: adhoc A\n");
 372                         k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
 373                                                sizeof(adhoc_rates_a));
 374                         break;
 375                 }
 376         }
 377
 378         return k;
 379 }