LXR linux/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
  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
  74struct region_code_mapping {
  75        u8 code;
  76        u8 region[IEEE80211_COUNTRY_STRING_LEN];
  77};
  78
  79static 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 */
  91u8 *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 */
 109u32 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 */
 252u32 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 */
 319u32 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 */
 333struct mwifiex_chan_freq_power *
 334mwifiex_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 */
 391u8
 392mwifiex_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 */
 413u32 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            priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
 420                switch (adapter->config_bands) {
 421                case BAND_B:
 422                        dev_dbg(adapter->dev, "info: infra band=%d "
 423                                "supported_rates_b\n", adapter->config_bands);
 424                        k = mwifiex_copy_rates(rates, k, supported_rates_b,
 425                                               sizeof(supported_rates_b));
 426                        break;
 427                case BAND_G:
 428                case BAND_G | BAND_GN:
 429                case BAND_G | BAND_GN | BAND_GAC:
 430                        dev_dbg(adapter->dev, "info: infra band=%d "
 431                                "supported_rates_g\n", adapter->config_bands);
 432                        k = mwifiex_copy_rates(rates, k, supported_rates_g,
 433                                               sizeof(supported_rates_g));
 434                        break;
 435                case BAND_B | BAND_G:
 436                case BAND_A | BAND_B | BAND_G:
 437                case BAND_A | BAND_B:
 438                case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
 439                case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN | BAND_AAC:
 440                case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN |
 441                     BAND_AAC | BAND_GAC:
 442                case BAND_B | BAND_G | BAND_GN:
 443                case BAND_B | BAND_G | BAND_GN | BAND_GAC:
 444                        dev_dbg(adapter->dev, "info: infra band=%d "
 445                                "supported_rates_bg\n", adapter->config_bands);
 446                        k = mwifiex_copy_rates(rates, k, supported_rates_bg,
 447                                               sizeof(supported_rates_bg));
 448                        break;
 449                case BAND_A:
 450                case BAND_A | BAND_G:
 451                        dev_dbg(adapter->dev, "info: infra band=%d "
 452                                "supported_rates_a\n", adapter->config_bands);
 453                        k = mwifiex_copy_rates(rates, k, supported_rates_a,
 454                                               sizeof(supported_rates_a));
 455                        break;
 456                case BAND_AN:
 457                case BAND_A | BAND_AN:
 458                case BAND_A | BAND_AN | BAND_AAC:
 459                case BAND_A | BAND_G | BAND_AN | BAND_GN:
 460                case BAND_A | BAND_G | BAND_AN | BAND_GN | BAND_AAC:
 461                        dev_dbg(adapter->dev, "info: infra band=%d "
 462                                "supported_rates_a\n", adapter->config_bands);
 463                        k = mwifiex_copy_rates(rates, k, supported_rates_a,
 464                                               sizeof(supported_rates_a));
 465                        break;
 466                case BAND_GN:
 467                case BAND_GN | BAND_GAC:
 468                        dev_dbg(adapter->dev, "info: infra band=%d "
 469                                "supported_rates_n\n", adapter->config_bands);
 470                        k = mwifiex_copy_rates(rates, k, supported_rates_n,
 471                                               sizeof(supported_rates_n));
 472                        break;
 473                }
 474        } else {
 475                /* Ad-hoc mode */
 476                switch (adapter->adhoc_start_band) {
 477                case BAND_B:
 478                        dev_dbg(adapter->dev, "info: adhoc B\n");
 479                        k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
 480                                               sizeof(adhoc_rates_b));
 481                        break;
 482                case BAND_G:
 483                case BAND_G | BAND_GN:
 484                        dev_dbg(adapter->dev, "info: adhoc G only\n");
 485                        k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
 486                                               sizeof(adhoc_rates_g));
 487                        break;
 488                case BAND_B | BAND_G:
 489                case BAND_B | BAND_G | BAND_GN:
 490                        dev_dbg(adapter->dev, "info: adhoc BG\n");
 491                        k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
 492                                               sizeof(adhoc_rates_bg));
 493                        break;
 494                case BAND_A:
 495                case BAND_A | BAND_AN:
 496                        dev_dbg(adapter->dev, "info: adhoc A\n");
 497                        k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
 498                                               sizeof(adhoc_rates_a));
 499                        break;
 500                }
 501        }
 502
 503        return k;
 504}
 505