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_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 returns the current active data rates.
 171 *
 172 * The result may vary depending upon connection status.
 173 */
 174u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
 175{
 176        if (!priv->media_connected)
 177                return mwifiex_get_supported_rates(priv, rates);
 178        else
 179                return mwifiex_copy_rates(rates, 0,
 180                                          priv->curr_bss_params.data_rates,
 181                                          priv->curr_bss_params.num_of_rates);
 182}
 183
 184/*
 185 * This function locates the Channel-Frequency-Power triplet based upon
 186 * band and channel/frequency parameters.
 187 */
 188struct mwifiex_chan_freq_power *
 189mwifiex_get_cfp(struct mwifiex_private *priv, u8 band, u16 channel, u32 freq)
 190{
 191        struct mwifiex_chan_freq_power *cfp = NULL;
 192        struct ieee80211_supported_band *sband;
 193        struct ieee80211_channel *ch = NULL;
 194        int i;
 195
 196        if (!channel && !freq)
 197                return cfp;
 198
 199        if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 200                sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 201        else
 202                sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
 203
 204        if (!sband) {
 205                dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d\n",
 206                        __func__, band);
 207                return cfp;
 208        }
 209
 210        for (i = 0; i < sband->n_channels; i++) {
 211                ch = &sband->channels[i];
 212
 213                if (ch->flags & IEEE80211_CHAN_DISABLED)
 214                        continue;
 215
 216                if (freq) {
 217                        if (ch->center_freq == freq)
 218                                break;
 219                } else {
 220                        /* find by valid channel*/
 221                        if (ch->hw_value == channel ||
 222                            channel == FIRST_VALID_CHANNEL)
 223                                break;
 224                }
 225        }
 226        if (i == sband->n_channels) {
 227                dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 228                        " & channel=%d freq=%d\n", __func__, band, channel,
 229                        freq);
 230        } else {
 231                if (!ch)
 232                        return cfp;
 233
 234                priv->cfp.channel = ch->hw_value;
 235                priv->cfp.freq = ch->center_freq;
 236                priv->cfp.max_tx_power = ch->max_power;
 237                cfp = &priv->cfp;
 238        }
 239
 240        return cfp;
 241}
 242
 243/*
 244 * This function checks if the data rate is set to auto.
 245 */
 246u8
 247mwifiex_is_rate_auto(struct mwifiex_private *priv)
 248{
 249        u32 i;
 250        int rate_num = 0;
 251
 252        for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
 253                if (priv->bitmap_rates[i])
 254                        rate_num++;
 255
 256        if (rate_num > 1)
 257                return true;
 258        else
 259                return false;
 260}
 261
 262/*
 263 * This function gets the supported data rates.
 264 *
 265 * The function works in both Ad-Hoc and infra mode by printing the
 266 * band and returning the data rates.
 267 */
 268u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
 269{
 270        u32 k = 0;
 271        struct mwifiex_adapter *adapter = priv->adapter;
 272        if (priv->bss_mode == NL80211_IFTYPE_STATION) {
 273                switch (adapter->config_bands) {
 274                case BAND_B:
 275                        dev_dbg(adapter->dev, "info: infra band=%d "
 276                                "supported_rates_b\n", adapter->config_bands);
 277                        k = mwifiex_copy_rates(rates, k, supported_rates_b,
 278                                               sizeof(supported_rates_b));
 279                        break;
 280                case BAND_G:
 281                case BAND_G | BAND_GN:
 282                        dev_dbg(adapter->dev, "info: infra band=%d "
 283                                "supported_rates_g\n", adapter->config_bands);
 284                        k = mwifiex_copy_rates(rates, k, supported_rates_g,
 285                                               sizeof(supported_rates_g));
 286                        break;
 287                case BAND_B | BAND_G:
 288                case BAND_A | BAND_B | BAND_G:
 289                case BAND_A | BAND_B:
 290                case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
 291                case BAND_B | BAND_G | BAND_GN:
 292                        dev_dbg(adapter->dev, "info: infra band=%d "
 293                                "supported_rates_bg\n", adapter->config_bands);
 294                        k = mwifiex_copy_rates(rates, k, supported_rates_bg,
 295                                               sizeof(supported_rates_bg));
 296                        break;
 297                case BAND_A:
 298                case BAND_A | BAND_G:
 299                        dev_dbg(adapter->dev, "info: infra band=%d "
 300                                "supported_rates_a\n", adapter->config_bands);
 301                        k = mwifiex_copy_rates(rates, k, supported_rates_a,
 302                                               sizeof(supported_rates_a));
 303                        break;
 304                case BAND_A | BAND_AN:
 305                case BAND_A | BAND_G | BAND_AN | BAND_GN:
 306                        dev_dbg(adapter->dev, "info: infra band=%d "
 307                                "supported_rates_a\n", adapter->config_bands);
 308                        k = mwifiex_copy_rates(rates, k, supported_rates_a,
 309                                               sizeof(supported_rates_a));
 310                        break;
 311                case BAND_GN:
 312                        dev_dbg(adapter->dev, "info: infra band=%d "
 313                                "supported_rates_n\n", adapter->config_bands);
 314                        k = mwifiex_copy_rates(rates, k, supported_rates_n,
 315                                               sizeof(supported_rates_n));
 316                        break;
 317                }
 318        } else {
 319                /* Ad-hoc mode */
 320                switch (adapter->adhoc_start_band) {
 321                case BAND_B:
 322                        dev_dbg(adapter->dev, "info: adhoc B\n");
 323                        k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
 324                                               sizeof(adhoc_rates_b));
 325                        break;
 326                case BAND_G:
 327                case BAND_G | BAND_GN:
 328                        dev_dbg(adapter->dev, "info: adhoc G only\n");
 329                        k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
 330                                               sizeof(adhoc_rates_g));
 331                        break;
 332                case BAND_B | BAND_G:
 333                case BAND_B | BAND_G | BAND_GN:
 334                        dev_dbg(adapter->dev, "info: adhoc BG\n");
 335                        k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
 336                                               sizeof(adhoc_rates_bg));
 337                        break;
 338                case BAND_A:
 339                case BAND_A | BAND_AN:
 340                        dev_dbg(adapter->dev, "info: adhoc A\n");
 341                        k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
 342                                               sizeof(adhoc_rates_a));
 343                        break;
 344                }
 345        }
 346
 347        return k;
 348}
 349