LXR linux/drivers/net/wireless/mwifiex/cfp.c

   1/*
   2 * Marvell Wireless LAN device driver: Channel, Frequence and Power
   3 *
   4 * Copyright (C) 2011-2014, 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
  40static u8 adhoc_rates_b[B_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96, 0 };
  41
  42static u8 adhoc_rates_g[G_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
  43                                               0xb0, 0x48, 0x60, 0x6c, 0 };
  44
  45static u8 adhoc_rates_bg[BG_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96,
  46                                                 0x0c, 0x12, 0x18, 0x24,
  47                                                 0x30, 0x48, 0x60, 0x6c, 0 };
  48
  49static u8 adhoc_rates_a[A_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
  50                                               0xb0, 0x48, 0x60, 0x6c, 0 };
  51static u8 supported_rates_a[A_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
  52                                        0xb0, 0x48, 0x60, 0x6c, 0 };
  53static 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
  60static u8 supported_rates_b[B_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x16, 0 };
  61
  62static u8 supported_rates_g[G_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
  63                                        0x30, 0x48, 0x60, 0x6c, 0 };
  64
  65static u8 supported_rates_bg[BG_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x0c,
  66                                        0x12, 0x16, 0x18, 0x24, 0x30, 0x48,
  67                                        0x60, 0x6c, 0 };
  68
  69u16 region_code_index[MWIFIEX_MAX_REGION_CODE] = { 0x10, 0x20, 0x30,
  70                                                0x32, 0x40, 0x41, 0xff };
  71
  72static u8 supported_rates_n[N_SUPPORTED_RATES] = { 0x02, 0x04, 0 };
  73
  74/* For every mcs_rate line, the first 8 bytes are for stream 1x1,
  75 * and all 16 bytes are for stream 2x2.
  76 */
  77static const u16 mcs_rate[4][16] = {
  78        /* LGI 40M */
  79        { 0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e,
  80          0x36, 0x6c, 0xa2, 0xd8, 0x144, 0x1b0, 0x1e6, 0x21c },
  81
  82        /* SGI 40M */
  83        { 0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c,
  84          0x3c, 0x78, 0xb4, 0xf0, 0x168, 0x1e0, 0x21c, 0x258 },
  85
  86        /* LGI 20M */
  87        { 0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82,
  88          0x1a, 0x34, 0x4e, 0x68, 0x9c, 0xd0, 0xea, 0x104 },
  89
  90        /* SGI 20M */
  91        { 0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90,
  92          0x1c, 0x39, 0x56, 0x73, 0xad, 0xe7, 0x104, 0x120 }
  93};
  94
  95/* AC rates */
  96static const u16 ac_mcs_rate_nss1[8][10] = {
  97        /* LG 160M */
  98        { 0x75, 0xEA, 0x15F, 0x1D4, 0x2BE, 0x3A8, 0x41D,
  99          0x492, 0x57C, 0x618 },
 100
 101        /* SG 160M */
 102        { 0x82, 0x104, 0x186, 0x208, 0x30C, 0x410, 0x492,
 103          0x514, 0x618, 0x6C6 },
 104
 105        /* LG 80M */
 106        { 0x3B, 0x75, 0xB0, 0xEA, 0x15F, 0x1D4, 0x20F,
 107          0x249, 0x2BE, 0x30C },
 108
 109        /* SG 80M */
 110        { 0x41, 0x82, 0xC3, 0x104, 0x186, 0x208, 0x249,
 111          0x28A, 0x30C, 0x363 },
 112
 113        /* LG 40M */
 114        { 0x1B, 0x36, 0x51, 0x6C, 0xA2, 0xD8, 0xF3,
 115          0x10E, 0x144, 0x168 },
 116
 117        /* SG 40M */
 118        { 0x1E, 0x3C, 0x5A, 0x78, 0xB4, 0xF0, 0x10E,
 119          0x12C, 0x168, 0x190 },
 120
 121        /* LG 20M */
 122        { 0xD, 0x1A, 0x27, 0x34, 0x4E, 0x68, 0x75, 0x82, 0x9C, 0x00 },
 123
 124        /* SG 20M */
 125        { 0xF, 0x1D, 0x2C, 0x3A, 0x57, 0x74, 0x82, 0x91, 0xAE, 0x00 },
 126};
 127
 128/* NSS2 note: the value in the table is 2 multiplier of the actual rate */
 129static const u16 ac_mcs_rate_nss2[8][10] = {
 130        /* LG 160M */
 131        { 0xEA, 0x1D4, 0x2BE, 0x3A8, 0x57C, 0x750, 0x83A,
 132          0x924, 0xAF8, 0xC30 },
 133
 134        /* SG 160M */
 135        { 0x104, 0x208, 0x30C, 0x410, 0x618, 0x820, 0x924,
 136          0xA28, 0xC30, 0xD8B },
 137
 138        /* LG 80M */
 139        { 0x75, 0xEA, 0x15F, 0x1D4, 0x2BE, 0x3A8, 0x41D,
 140          0x492, 0x57C, 0x618 },
 141
 142        /* SG 80M */
 143        { 0x82, 0x104, 0x186, 0x208, 0x30C, 0x410, 0x492,
 144          0x514, 0x618, 0x6C6 },
 145
 146        /* LG 40M */
 147        { 0x36, 0x6C, 0xA2, 0xD8, 0x144, 0x1B0, 0x1E6,
 148          0x21C, 0x288, 0x2D0 },
 149
 150        /* SG 40M */
 151        { 0x3C, 0x78, 0xB4, 0xF0, 0x168, 0x1E0, 0x21C,
 152          0x258, 0x2D0, 0x320 },
 153
 154        /* LG 20M */
 155        { 0x1A, 0x34, 0x4A, 0x68, 0x9C, 0xD0, 0xEA, 0x104,
 156          0x138, 0x00 },
 157
 158        /* SG 20M */
 159        { 0x1D, 0x3A, 0x57, 0x74, 0xAE, 0xE6, 0x104, 0x121,
 160          0x15B, 0x00 },
 161};
 162
 163struct region_code_mapping {
 164        u8 code;
 165        u8 region[IEEE80211_COUNTRY_STRING_LEN];
 166};
 167
 168static struct region_code_mapping region_code_mapping_t[] = {
 169        { 0x10, "US " }, /* US FCC */
 170        { 0x20, "CA " }, /* IC Canada */
 171        { 0x30, "EU " }, /* ETSI */
 172        { 0x31, "ES " }, /* Spain */
 173        { 0x32, "FR " }, /* France */
 174        { 0x40, "JP " }, /* Japan */
 175        { 0x41, "JP " }, /* Japan */
 176        { 0x50, "CN " }, /* China */
 177};
 178
 179/* This function converts integer code to region string */
 180u8 *mwifiex_11d_code_2_region(u8 code)
 181{
 182        u8 i;
 183        u8 size = sizeof(region_code_mapping_t)/
 184                                sizeof(struct region_code_mapping);
 185
 186        /* Look for code in mapping table */
 187        for (i = 0; i < size; i++)
 188                if (region_code_mapping_t[i].code == code)
 189                        return region_code_mapping_t[i].region;
 190
 191        return NULL;
 192}
 193
 194/*
 195 * This function maps an index in supported rates table into
 196 * the corresponding data rate.
 197 */
 198u32 mwifiex_index_to_acs_data_rate(struct mwifiex_private *priv,
 199                                   u8 index, u8 ht_info)
 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 */
 252u32 mwifiex_index_to_data_rate(struct mwifiex_private *priv,
 253                               u8 index, u8 ht_info)
 254{
 255        u32 mcs_num_supp =
 256                (priv->adapter->user_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
 257        u32 rate;
 258
 259        if (priv->adapter->is_hw_11ac_capable)
 260                return mwifiex_index_to_acs_data_rate(priv, index, ht_info);
 261
 262        if (ht_info & BIT(0)) {
 263                if (index == MWIFIEX_RATE_BITMAP_MCS0) {
 264                        if (ht_info & BIT(2))
 265                                rate = 0x0D;    /* MCS 32 SGI rate */
 266                        else
 267                                rate = 0x0C;    /* MCS 32 LGI rate */
 268                } else if (index < mcs_num_supp) {
 269                        if (ht_info & BIT(1)) {
 270                                if (ht_info & BIT(2))
 271                                        /* SGI, 40M */
 272                                        rate = mcs_rate[1][index];
 273                                else
 274                                        /* LGI, 40M */
 275                                        rate = mcs_rate[0][index];
 276                        } else {
 277                                if (ht_info & BIT(2))
 278                                        /* SGI, 20M */
 279                                        rate = mcs_rate[3][index];
 280                                else
 281                                        /* LGI, 20M */
 282                                        rate = mcs_rate[2][index];
 283                        }
 284                } else
 285                        rate = mwifiex_data_rates[0];
 286        } else {
 287                if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
 288                        index = 0;
 289                rate = mwifiex_data_rates[index];
 290        }
 291        return rate;
 292}
 293
 294/*
 295 * This function returns the current active data rates.
 296 *
 297 * The result may vary depending upon connection status.
 298 */
 299u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
 300{
 301        if (!priv->media_connected)
 302                return mwifiex_get_supported_rates(priv, rates);
 303        else
 304                return mwifiex_copy_rates(rates, 0,
 305                                          priv->curr_bss_params.data_rates,
 306                                          priv->curr_bss_params.num_of_rates);
 307}
 308
 309/*
 310 * This function locates the Channel-Frequency-Power triplet based upon
 311 * band and channel/frequency parameters.
 312 */
 313struct mwifiex_chan_freq_power *
 314mwifiex_get_cfp(struct mwifiex_private *priv, u8 band, u16 channel, u32 freq)
 315{
 316        struct mwifiex_chan_freq_power *cfp = NULL;
 317        struct ieee80211_supported_band *sband;
 318        struct ieee80211_channel *ch = NULL;
 319        int i;
 320
 321        if (!channel && !freq)
 322                return cfp;
 323
 324        if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 325                sband = priv->wdev.wiphy->bands[IEEE80211_BAND_2GHZ];
 326        else
 327                sband = priv->wdev.wiphy->bands[IEEE80211_BAND_5GHZ];
 328
 329        if (!sband) {
 330                dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d\n",
 331                        __func__, band);
 332                return cfp;
 333        }
 334
 335        for (i = 0; i < sband->n_channels; i++) {
 336                ch = &sband->channels[i];
 337
 338                if (ch->flags & IEEE80211_CHAN_DISABLED)
 339                        continue;
 340
 341                if (freq) {
 342                        if (ch->center_freq == freq)
 343                                break;
 344                } else {
 345                        /* find by valid channel*/
 346                        if (ch->hw_value == channel ||
 347                            channel == FIRST_VALID_CHANNEL)
 348                                break;
 349                }
 350        }
 351        if (i == sband->n_channels) {
 352                dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 353                        " & channel=%d freq=%d\n", __func__, band, channel,
 354                        freq);
 355        } else {
 356                if (!ch)
 357                        return cfp;
 358
 359                priv->cfp.channel = ch->hw_value;
 360                priv->cfp.freq = ch->center_freq;
 361                priv->cfp.max_tx_power = ch->max_power;
 362                cfp = &priv->cfp;
 363        }
 364
 365        return cfp;
 366}
 367
 368/*
 369 * This function checks if the data rate is set to auto.
 370 */
 371u8
 372mwifiex_is_rate_auto(struct mwifiex_private *priv)
 373{
 374        u32 i;
 375        int rate_num = 0;
 376
 377        for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
 378                if (priv->bitmap_rates[i])
 379                        rate_num++;
 380
 381        if (rate_num > 1)
 382                return true;
 383        else
 384                return false;
 385}
 386
 387/* This function gets the supported data rates from bitmask inside
 388 * cfg80211_scan_request.
 389 */
 390u32 mwifiex_get_rates_from_cfg80211(struct mwifiex_private *priv,
 391                                    u8 *rates, u8 radio_type)
 392{
 393        struct wiphy *wiphy = priv->adapter->wiphy;
 394        struct cfg80211_scan_request *request = priv->scan_request;
 395        u32 num_rates, rate_mask;
 396        struct ieee80211_supported_band *sband;
 397        int i;
 398
 399        if (radio_type) {
 400                sband = wiphy->bands[IEEE80211_BAND_5GHZ];
 401                if (WARN_ON_ONCE(!sband))
 402                        return 0;
 403                rate_mask = request->rates[IEEE80211_BAND_5GHZ];
 404        } else {
 405                sband = wiphy->bands[IEEE80211_BAND_2GHZ];
 406                if (WARN_ON_ONCE(!sband))
 407                        return 0;
 408                rate_mask = request->rates[IEEE80211_BAND_2GHZ];
 409        }
 410
 411        num_rates = 0;
 412        for (i = 0; i < sband->n_bitrates; i++) {
 413                if ((BIT(i) & rate_mask) == 0)
 414                        continue; /* skip rate */
 415                rates[num_rates++] = (u8)(sband->bitrates[i].bitrate / 5);
 416        }
 417
 418        return num_rates;
 419}
 420
 421/* This function gets the supported data rates. The function works in
 422 * both Ad-Hoc and infra mode by printing the band and returning the
 423 * data rates.
 424 */
 425u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
 426{
 427        u32 k = 0;
 428        struct mwifiex_adapter *adapter = priv->adapter;
 429
 430        if (priv->bss_mode == NL80211_IFTYPE_STATION ||
 431            priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
 432                switch (adapter->config_bands) {
 433                case BAND_B:
 434                        dev_dbg(adapter->dev, "info: infra band=%d "
 435                                "supported_rates_b\n", adapter->config_bands);
 436                        k = mwifiex_copy_rates(rates, k, supported_rates_b,
 437                                               sizeof(supported_rates_b));
 438                        break;
 439                case BAND_G:
 440                case BAND_G | BAND_GN:
 441                        dev_dbg(adapter->dev, "info: infra band=%d "
 442                                "supported_rates_g\n", adapter->config_bands);
 443                        k = mwifiex_copy_rates(rates, k, supported_rates_g,
 444                                               sizeof(supported_rates_g));
 445                        break;
 446                case BAND_B | BAND_G:
 447                case BAND_A | BAND_B | BAND_G:
 448                case BAND_A | BAND_B:
 449                case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
 450                case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN | BAND_AAC:
 451                case BAND_B | BAND_G | BAND_GN:
 452                        dev_dbg(adapter->dev, "info: infra band=%d "
 453                                "supported_rates_bg\n", adapter->config_bands);
 454                        k = mwifiex_copy_rates(rates, k, supported_rates_bg,
 455                                               sizeof(supported_rates_bg));
 456                        break;
 457                case BAND_A:
 458                case BAND_A | BAND_G:
 459                        dev_dbg(adapter->dev, "info: infra band=%d "
 460                                "supported_rates_a\n", adapter->config_bands);
 461                        k = mwifiex_copy_rates(rates, k, supported_rates_a,
 462                                               sizeof(supported_rates_a));
 463                        break;
 464                case BAND_AN:
 465                case BAND_A | BAND_AN:
 466                case BAND_A | BAND_AN | BAND_AAC:
 467                case BAND_A | BAND_G | BAND_AN | BAND_GN:
 468                case BAND_A | BAND_G | BAND_AN | BAND_GN | BAND_AAC:
 469                        dev_dbg(adapter->dev, "info: infra band=%d "
 470                                "supported_rates_a\n", adapter->config_bands);
 471                        k = mwifiex_copy_rates(rates, k, supported_rates_a,
 472                                               sizeof(supported_rates_a));
 473                        break;
 474                case BAND_GN:
 475                        dev_dbg(adapter->dev, "info: infra band=%d "
 476                                "supported_rates_n\n", adapter->config_bands);
 477                        k = mwifiex_copy_rates(rates, k, supported_rates_n,
 478                                               sizeof(supported_rates_n));
 479                        break;
 480                }
 481        } else {
 482                /* Ad-hoc mode */
 483                switch (adapter->adhoc_start_band) {
 484                case BAND_B:
 485                        dev_dbg(adapter->dev, "info: adhoc B\n");
 486                        k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
 487                                               sizeof(adhoc_rates_b));
 488                        break;
 489                case BAND_G:
 490                case BAND_G | BAND_GN:
 491                        dev_dbg(adapter->dev, "info: adhoc G only\n");
 492                        k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
 493                                               sizeof(adhoc_rates_g));
 494                        break;
 495                case BAND_B | BAND_G:
 496                case BAND_B | BAND_G | BAND_GN:
 497                        dev_dbg(adapter->dev, "info: adhoc BG\n");
 498                        k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
 499                                               sizeof(adhoc_rates_bg));
 500                        break;
 501                case BAND_A:
 502                case BAND_A | BAND_AN:
 503                        dev_dbg(adapter->dev, "info: adhoc A\n");
 504                        k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
 505                                               sizeof(adhoc_rates_a));
 506                        break;
 507                }
 508        }
 509
 510        return k;
 511}
 512
 513u8 mwifiex_adjust_data_rate(struct mwifiex_private *priv,
 514                            u8 rx_rate, u8 rate_info)
 515{
 516        u8 rate_index = 0;
 517
 518        /* HT40 */
 519        if ((rate_info & BIT(0)) && (rate_info & BIT(1)))
 520                rate_index = MWIFIEX_RATE_INDEX_MCS0 +
 521                             MWIFIEX_BW20_MCS_NUM + rx_rate;
 522        else if (rate_info & BIT(0)) /* HT20 */
 523                rate_index = MWIFIEX_RATE_INDEX_MCS0 + rx_rate;
 524        else
 525                rate_index = (rx_rate > MWIFIEX_RATE_INDEX_OFDM0) ?
 526                              rx_rate - 1 : rx_rate;
 527
 528        return rate_index;
 529}
 530