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_acs_data_rate(struct mwifiex_private *priv,
 110                                    u8 index, 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         /* AC rates */
 134         u16 ac_mcs_rate_nss1[8][10] = {
 135                 /* LG 160M */
 136                 { 0x75, 0xEA, 0x15F, 0x1D4, 0x2BE, 0x3A8, 0x41D,
 137                   0x492, 0x57C, 0x618 },
 138
 139                 /* SG 160M */
 140                 { 0x82, 0x104, 0x186, 0x208, 0x30C, 0x410, 0x492,
 141                   0x514, 0x618, 0x6C6 },
 142
 143                 /* LG 80M */
 144                 { 0x3B, 0x75, 0xB0, 0xEA, 0x15F, 0x1D4, 0x20F,
 145                   0x249, 0x2BE, 0x30C },
 146
 147                 /* SG 80M */
 148                 { 0x41, 0x82, 0xC3, 0x104, 0x186, 0x208, 0x249,
 149                   0x28A, 0x30C, 0x363 },
 150
 151                 /* LG 40M */
 152                 { 0x1B, 0x36, 0x51, 0x6C, 0xA2, 0xD8, 0xF3,
 153                   0x10E, 0x144, 0x168 },
 154
 155                 /* SG 40M */
 156                 { 0x1E, 0x3C, 0x5A, 0x78, 0xB4, 0xF0, 0x10E,
 157                   0x12C, 0x168, 0x190 },
 158
 159                 /* LG 20M */
 160                 { 0xD, 0x1A, 0x27, 0x34, 0x4E, 0x68, 0x75, 0x82, 0x9C, 0x00 },
 161
 162                 /* SG 20M */
 163                 { 0xF, 0x1D, 0x2C, 0x3A, 0x57, 0x74, 0x82, 0x91, 0xAE, 0x00 },
 164         };
 165         /* NSS2 note: the value in the table is 2 multiplier of the actual
 166          * rate
 167          */
 168         u16 ac_mcs_rate_nss2[8][10] = {
 169                 /* LG 160M */
 170                 { 0xEA, 0x1D4, 0x2BE, 0x3A8, 0x57C, 0x750, 0x83A,
 171                   0x924, 0xAF8, 0xC30 },
 172
 173                 /* SG 160M */
 174                 { 0x104, 0x208, 0x30C, 0x410, 0x618, 0x820, 0x924,
 175                   0xA28, 0xC30, 0xD8B },
 176
 177                 /* LG 80M */
 178                 { 0x75, 0xEA, 0x15F, 0x1D4, 0x2BE, 0x3A8, 0x41D,
 179                   0x492, 0x57C, 0x618 },
 180
 181                 /* SG 80M */
 182                 { 0x82, 0x104, 0x186, 0x208, 0x30C, 0x410, 0x492,
 183                   0x514, 0x618, 0x6C6 },
 184
 185                 /* LG 40M */
 186                 { 0x36, 0x6C, 0xA2, 0xD8, 0x144, 0x1B0, 0x1E6,
 187                   0x21C, 0x288, 0x2D0 },
 188
 189                 /* SG 40M */
 190                 { 0x3C, 0x78, 0xB4, 0xF0, 0x168, 0x1E0, 0x21C,
 191                   0x258, 0x2D0, 0x320 },
 192
 193                 /* LG 20M */
 194                 { 0x1A, 0x34, 0x4A, 0x68, 0x9C, 0xD0, 0xEA, 0x104,
 195                   0x138, 0x00 },
 196
 197                 /* SG 20M */
 198                 { 0x1D, 0x3A, 0x57, 0x74, 0xAE, 0xE6, 0x104, 0x121,
 199                   0x15B, 0x00 },
 200         };
 201         u32 rate = 0;
 202         u8 mcs_index = 0;
 203         u8 bw = 0;
 204         u8 gi = 0;
 205
 206         if ((ht_info & 0x3) == MWIFIEX_RATE_FORMAT_VHT) {
 207                 mcs_index = min(index & 0xF, 9);
 208
 209                 /* 20M: bw=0, 40M: bw=1, 80M: bw=2, 160M: bw=3 */
 210                 bw = (ht_info & 0xC) >> 2;
 211
 212                 /* LGI: gi =0, SGI: gi = 1 */
 213                 gi = (ht_info & 0x10) >> 4;
 214
 215                 if ((index >> 4) == 1)  /* NSS = 2 */
 216                         rate = ac_mcs_rate_nss2[2 * (3 - bw) + gi][mcs_index];
 217                 else                    /* NSS = 1 */
 218                         rate = ac_mcs_rate_nss1[2 * (3 - bw) + gi][mcs_index];
 219         } else if ((ht_info & 0x3) == MWIFIEX_RATE_FORMAT_HT) {
 220                 /* 20M: bw=0, 40M: bw=1 */
 221                 bw = (ht_info & 0xC) >> 2;
 222
 223                 /* LGI: gi =0, SGI: gi = 1 */
 224                 gi = (ht_info & 0x10) >> 4;
 225
 226                 if (index == MWIFIEX_RATE_BITMAP_MCS0) {
 227                         if (gi == 1)
 228                                 rate = 0x0D;    /* MCS 32 SGI rate */
 229                         else
 230                                 rate = 0x0C;    /* MCS 32 LGI rate */
 231                 } else if (index < 16) {
 232                         if ((bw == 1) || (bw == 0))
 233                                 rate = mcs_rate[2 * (1 - bw) + gi][index];
 234                         else
 235                                 rate = mwifiex_data_rates[0];
 236                 } else {
 237                         rate = mwifiex_data_rates[0];
 238                 }
 239         } else {
 240                 /* 11n non-HT rates */
 241                 if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
 242                         index = 0;
 243                 rate = mwifiex_data_rates[index];
 244         }
 245
 246         return rate;
 247 }
 248
 249 /* This function maps an index in supported rates table into
 250  * the corresponding data rate.
 251  */
 252 u32 mwifiex_index_to_data_rate(struct mwifiex_private *priv,
 253                                u8 index, u8 ht_info)
 254 {
 255         /* For every mcs_rate line, the first 8 bytes are for stream 1x1,
 256          * and all 16 bytes are for stream 2x2.
 257          */
 258         u16  mcs_rate[4][16] = {
 259                 /* LGI 40M */
 260                 { 0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e,
 261                   0x36, 0x6c, 0xa2, 0xd8, 0x144, 0x1b0, 0x1e6, 0x21c },
 262
 263                 /* SGI 40M */
 264                 { 0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c,
 265                   0x3c, 0x78, 0xb4, 0xf0, 0x168, 0x1e0, 0x21c, 0x258 },
 266
 267                 /* LGI 20M */
 268                 { 0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82,
 269                   0x1a, 0x34, 0x4e, 0x68, 0x9c, 0xd0, 0xea, 0x104 },
 270
 271                 /* SGI 20M */
 272                 { 0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90,
 273                   0x1c, 0x39, 0x56, 0x73, 0xad, 0xe7, 0x104, 0x120 }
 274         };
 275         u32 mcs_num_supp =
 276                 (priv->adapter->hw_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
 277         u32 rate;
 278
 279         if (priv->adapter->is_hw_11ac_capable)
 280                 return mwifiex_index_to_acs_data_rate(priv, index, ht_info);
 281
 282         if (ht_info & BIT(0)) {
 283                 if (index == MWIFIEX_RATE_BITMAP_MCS0) {
 284                         if (ht_info & BIT(2))
 285                                 rate = 0x0D;    /* MCS 32 SGI rate */
 286                         else
 287                                 rate = 0x0C;    /* MCS 32 LGI rate */
 288                 } else if (index < mcs_num_supp) {
 289                         if (ht_info & BIT(1)) {
 290                                 if (ht_info & BIT(2))
 291                                         /* SGI, 40M */
 292                                         rate = mcs_rate[1][index];
 293                                 else
 294                                         /* LGI, 40M */
 295                                         rate = mcs_rate[0][index];
 296                         } else {
 297                                 if (ht_info & BIT(2))
 298                                         /* SGI, 20M */
 299                                         rate = mcs_rate[3][index];
 300                                 else
 301                                         /* LGI, 20M */
 302                                         rate = mcs_rate[2][index];
 303                         }
 304                 } else
 305                         rate = mwifiex_data_rates[0];
 306         } else {
 307                 if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
 308                         index = 0;
 309                 rate = mwifiex_data_rates[index];
 310         }
 311         return rate;
 312 }
 313
 314 /*
 315  * This function returns the current active data rates.
 316  *
 317  * The result may vary depending upon connection status.
 318  */
 319 u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
 320 {
 321         if (!priv->media_connected)
 322                 return mwifiex_get_supported_rates(priv, rates);
 323         else
 324                 return mwifiex_copy_rates(rates, 0,
 325                                           priv->curr_bss_params.data_rates,
 326                                           priv->curr_bss_params.num_of_rates);
 327 }
 328
 329 /*
 330  * This function locates the Channel-Frequency-Power triplet based upon
 331  * band and channel/frequency parameters.
 332  */
 333 struct mwifiex_chan_freq_power *
 334 mwifiex_get_cfp(struct mwifiex_private *priv, u8 band, u16 channel, u32 freq)
 335 {
 336         struct mwifiex_chan_freq_power *cfp = NULL;
 337         struct ieee80211_supported_band *sband;
 338         struct ieee80211_channel *ch = NULL;
 339         int i;
 340
 341         if (!channel && !freq)
 342                 return cfp;
 343
 344         if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 345                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 346         else
 347                 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
 348
 349         if (!sband) {
 350                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d\n",
 351                         __func__, band);
 352                 return cfp;
 353         }
 354
 355         for (i = 0; i < sband->n_channels; i++) {
 356                 ch = &sband->channels[i];
 357
 358                 if (ch->flags & IEEE80211_CHAN_DISABLED)
 359                         continue;
 360
 361                 if (freq) {
 362                         if (ch->center_freq == freq)
 363                                 break;
 364                 } else {
 365                         /* find by valid channel*/
 366                         if (ch->hw_value == channel ||
 367                             channel == FIRST_VALID_CHANNEL)
 368                                 break;
 369                 }
 370         }
 371         if (i == sband->n_channels) {
 372                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 373                         " & channel=%d freq=%d\n", __func__, band, channel,
 374                         freq);
 375         } else {
 376                 if (!ch)
 377                         return cfp;
 378
 379                 priv->cfp.channel = ch->hw_value;
 380                 priv->cfp.freq = ch->center_freq;
 381                 priv->cfp.max_tx_power = ch->max_power;
 382                 cfp = &priv->cfp;
 383         }
 384
 385         return cfp;
 386 }
 387
 388 /*
 389  * This function checks if the data rate is set to auto.
 390  */
 391 u8
 392 mwifiex_is_rate_auto(struct mwifiex_private *priv)
 393 {
 394         u32 i;
 395         int rate_num = 0;
 396
 397         for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
 398                 if (priv->bitmap_rates[i])
 399                         rate_num++;
 400
 401         if (rate_num > 1)
 402                 return true;
 403         else
 404                 return false;
 405 }
 406
 407 /*
 408  * This function gets the supported data rates.
 409  *
 410  * The function works in both Ad-Hoc and infra mode by printing the
 411  * band and returning the data rates.
 412  */
 413 u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
 414 {
 415         u32 k = 0;
 416         struct mwifiex_adapter *adapter = priv->adapter;
 417
 418         if (priv->bss_mode == NL80211_IFTYPE_STATION) {
 419                 switch (adapter->config_bands) {
 420                 case BAND_B:
 421                         dev_dbg(adapter->dev, "info: infra band=%d "
 422                                 "supported_rates_b\n", adapter->config_bands);
 423                         k = mwifiex_copy_rates(rates, k, supported_rates_b,
 424                                                sizeof(supported_rates_b));
 425                         break;
 426                 case BAND_G:
 427                 case BAND_G | BAND_GN:
 428                 case BAND_G | BAND_GN | BAND_GAC:
 429                         dev_dbg(adapter->dev, "info: infra band=%d "
 430                                 "supported_rates_g\n", adapter->config_bands);
 431                         k = mwifiex_copy_rates(rates, k, supported_rates_g,
 432                                                sizeof(supported_rates_g));
 433                         break;
 434                 case BAND_B | BAND_G:
 435                 case BAND_A | BAND_B | BAND_G:
 436                 case BAND_A | BAND_B:
 437                 case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
 438                 case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN | BAND_AAC:
 439                 case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN |
 440                      BAND_AAC | BAND_GAC:
 441                 case BAND_B | BAND_G | BAND_GN:
 442                 case BAND_B | BAND_G | BAND_GN | BAND_GAC:
 443                         dev_dbg(adapter->dev, "info: infra band=%d "
 444                                 "supported_rates_bg\n", adapter->config_bands);
 445                         k = mwifiex_copy_rates(rates, k, supported_rates_bg,
 446                                                sizeof(supported_rates_bg));
 447                         break;
 448                 case BAND_A:
 449                 case BAND_A | BAND_G:
 450                         dev_dbg(adapter->dev, "info: infra band=%d "
 451                                 "supported_rates_a\n", adapter->config_bands);
 452                         k = mwifiex_copy_rates(rates, k, supported_rates_a,
 453                                                sizeof(supported_rates_a));
 454                         break;
 455                 case BAND_AN:
 456                 case BAND_A | BAND_AN:
 457                 case BAND_A | BAND_AN | BAND_AAC:
 458                 case BAND_A | BAND_G | BAND_AN | BAND_GN:
 459                 case BAND_A | BAND_G | BAND_AN | BAND_GN | BAND_AAC:
 460                         dev_dbg(adapter->dev, "info: infra band=%d "
 461                                 "supported_rates_a\n", adapter->config_bands);
 462                         k = mwifiex_copy_rates(rates, k, supported_rates_a,
 463                                                sizeof(supported_rates_a));
 464                         break;
 465                 case BAND_GN:
 466                 case BAND_GN | BAND_GAC:
 467                         dev_dbg(adapter->dev, "info: infra band=%d "
 468                                 "supported_rates_n\n", adapter->config_bands);
 469                         k = mwifiex_copy_rates(rates, k, supported_rates_n,
 470                                                sizeof(supported_rates_n));
 471                         break;
 472                 }
 473         } else {
 474                 /* Ad-hoc mode */
 475                 switch (adapter->adhoc_start_band) {
 476                 case BAND_B:
 477                         dev_dbg(adapter->dev, "info: adhoc B\n");
 478                         k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
 479                                                sizeof(adhoc_rates_b));
 480                         break;
 481                 case BAND_G:
 482                 case BAND_G | BAND_GN:
 483                         dev_dbg(adapter->dev, "info: adhoc G only\n");
 484                         k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
 485                                                sizeof(adhoc_rates_g));
 486                         break;
 487                 case BAND_B | BAND_G:
 488                 case BAND_B | BAND_G | BAND_GN:
 489                         dev_dbg(adapter->dev, "info: adhoc BG\n");
 490                         k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
 491                                                sizeof(adhoc_rates_bg));
 492                         break;
 493                 case BAND_A:
 494                 case BAND_A | BAND_AN:
 495                         dev_dbg(adapter->dev, "info: adhoc A\n");
 496                         k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
 497                                                sizeof(adhoc_rates_a));
 498                         break;
 499                 }
 500         }
 501
 502         return k;
 503 }