LXR linux/drivers/net/wireless/brcm80211/brcmsmac/rate.c

   1/*
   2 * Copyright (c) 2010 Broadcom Corporation
   3 *
   4 * Permission to use, copy, modify, and/or distribute this software for any
   5 * purpose with or without fee is hereby granted, provided that the above
   6 * copyright notice and this permission notice appear in all copies.
   7 *
   8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 */
  16
  17#include <brcmu_wifi.h>
  18#include <brcmu_utils.h>
  19
  20#include "d11.h"
  21#include "pub.h"
  22#include "rate.h"
  23
  24/*
  25 * Rate info per rate: It tells whether a rate is ofdm or not and its phy_rate
  26 * value
  27 */
  28const u8 rate_info[BRCM_MAXRATE + 1] = {
  29        /*  0     1     2     3     4     5     6     7     8     9 */
  30/*   0 */ 0x00, 0x00, 0x0a, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00,
  31/*  10 */ 0x00, 0x37, 0x8b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8f, 0x00,
  32/*  20 */ 0x00, 0x00, 0x6e, 0x00, 0x8a, 0x00, 0x00, 0x00, 0x00, 0x00,
  33/*  30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8e, 0x00, 0x00, 0x00,
  34/*  40 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x89, 0x00,
  35/*  50 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  36/*  60 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  37/*  70 */ 0x00, 0x00, 0x8d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  38/*  80 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  39/*  90 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, 0x00, 0x00,
  40/* 100 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8c
  41};
  42
  43/* rates are in units of Kbps */
  44const struct brcms_mcs_info mcs_table[MCS_TABLE_SIZE] = {
  45        /* MCS  0: SS 1, MOD: BPSK,  CR 1/2 */
  46        {6500, 13500, CEIL(6500 * 10, 9), CEIL(13500 * 10, 9), 0x00,
  47         BRCM_RATE_6M},
  48        /* MCS  1: SS 1, MOD: QPSK,  CR 1/2 */
  49        {13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x08,
  50         BRCM_RATE_12M},
  51        /* MCS  2: SS 1, MOD: QPSK,  CR 3/4 */
  52        {19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x0A,
  53         BRCM_RATE_18M},
  54        /* MCS  3: SS 1, MOD: 16QAM, CR 1/2 */
  55        {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x10,
  56         BRCM_RATE_24M},
  57        /* MCS  4: SS 1, MOD: 16QAM, CR 3/4 */
  58        {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x12,
  59         BRCM_RATE_36M},
  60        /* MCS  5: SS 1, MOD: 64QAM, CR 2/3 */
  61        {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x19,
  62         BRCM_RATE_48M},
  63        /* MCS  6: SS 1, MOD: 64QAM, CR 3/4 */
  64        {58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x1A,
  65         BRCM_RATE_54M},
  66        /* MCS  7: SS 1, MOD: 64QAM, CR 5/6 */
  67        {65000, 135000, CEIL(65000 * 10, 9), CEIL(135000 * 10, 9), 0x1C,
  68         BRCM_RATE_54M},
  69        /* MCS  8: SS 2, MOD: BPSK,  CR 1/2 */
  70        {13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x40,
  71         BRCM_RATE_6M},
  72        /* MCS  9: SS 2, MOD: QPSK,  CR 1/2 */
  73        {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x48,
  74         BRCM_RATE_12M},
  75        /* MCS 10: SS 2, MOD: QPSK,  CR 3/4 */
  76        {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x4A,
  77         BRCM_RATE_18M},
  78        /* MCS 11: SS 2, MOD: 16QAM, CR 1/2 */
  79        {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x50,
  80         BRCM_RATE_24M},
  81        /* MCS 12: SS 2, MOD: 16QAM, CR 3/4 */
  82        {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x52,
  83         BRCM_RATE_36M},
  84        /* MCS 13: SS 2, MOD: 64QAM, CR 2/3 */
  85        {104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0x59,
  86         BRCM_RATE_48M},
  87        /* MCS 14: SS 2, MOD: 64QAM, CR 3/4 */
  88        {117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x5A,
  89         BRCM_RATE_54M},
  90        /* MCS 15: SS 2, MOD: 64QAM, CR 5/6 */
  91        {130000, 270000, CEIL(130000 * 10, 9), CEIL(270000 * 10, 9), 0x5C,
  92         BRCM_RATE_54M},
  93        /* MCS 16: SS 3, MOD: BPSK,  CR 1/2 */
  94        {19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x80,
  95         BRCM_RATE_6M},
  96        /* MCS 17: SS 3, MOD: QPSK,  CR 1/2 */
  97        {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x88,
  98         BRCM_RATE_12M},
  99        /* MCS 18: SS 3, MOD: QPSK,  CR 3/4 */
 100        {58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x8A,
 101         BRCM_RATE_18M},
 102        /* MCS 19: SS 3, MOD: 16QAM, CR 1/2 */
 103        {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x90,
 104         BRCM_RATE_24M},
 105        /* MCS 20: SS 3, MOD: 16QAM, CR 3/4 */
 106        {117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x92,
 107         BRCM_RATE_36M},
 108        /* MCS 21: SS 3, MOD: 64QAM, CR 2/3 */
 109        {156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0x99,
 110         BRCM_RATE_48M},
 111        /* MCS 22: SS 3, MOD: 64QAM, CR 3/4 */
 112        {175500, 364500, CEIL(175500 * 10, 9), CEIL(364500 * 10, 9), 0x9A,
 113         BRCM_RATE_54M},
 114        /* MCS 23: SS 3, MOD: 64QAM, CR 5/6 */
 115        {195000, 405000, CEIL(195000 * 10, 9), CEIL(405000 * 10, 9), 0x9B,
 116         BRCM_RATE_54M},
 117        /* MCS 24: SS 4, MOD: BPSK,  CR 1/2 */
 118        {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0xC0,
 119         BRCM_RATE_6M},
 120        /* MCS 25: SS 4, MOD: QPSK,  CR 1/2 */
 121        {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0xC8,
 122         BRCM_RATE_12M},
 123        /* MCS 26: SS 4, MOD: QPSK,  CR 3/4 */
 124        {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0xCA,
 125         BRCM_RATE_18M},
 126        /* MCS 27: SS 4, MOD: 16QAM, CR 1/2 */
 127        {104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0xD0,
 128         BRCM_RATE_24M},
 129        /* MCS 28: SS 4, MOD: 16QAM, CR 3/4 */
 130        {156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0xD2,
 131         BRCM_RATE_36M},
 132        /* MCS 29: SS 4, MOD: 64QAM, CR 2/3 */
 133        {208000, 432000, CEIL(208000 * 10, 9), CEIL(432000 * 10, 9), 0xD9,
 134         BRCM_RATE_48M},
 135        /* MCS 30: SS 4, MOD: 64QAM, CR 3/4 */
 136        {234000, 486000, CEIL(234000 * 10, 9), CEIL(486000 * 10, 9), 0xDA,
 137         BRCM_RATE_54M},
 138        /* MCS 31: SS 4, MOD: 64QAM, CR 5/6 */
 139        {260000, 540000, CEIL(260000 * 10, 9), CEIL(540000 * 10, 9), 0xDB,
 140         BRCM_RATE_54M},
 141        /* MCS 32: SS 1, MOD: BPSK,  CR 1/2 */
 142        {0, 6000, 0, CEIL(6000 * 10, 9), 0x00, BRCM_RATE_6M},
 143};
 144
 145/*
 146 * phycfg for legacy OFDM frames: code rate, modulation scheme, spatial streams
 147 * Number of spatial streams: always 1 other fields: refer to table 78 of
 148 * section 17.3.2.2 of the original .11a standard
 149 */
 150struct legacy_phycfg {
 151        u32 rate_ofdm;  /* ofdm mac rate */
 152        /* phy ctl byte 3, code rate, modulation type, # of streams */
 153        u8 tx_phy_ctl3;
 154};
 155
 156/* Number of legacy_rate_cfg entries in the table */
 157#define LEGACY_PHYCFG_TABLE_SIZE        12
 158
 159/*
 160 * In CCK mode LPPHY overloads OFDM Modulation bits with CCK Data Rate
 161 * Eventually MIMOPHY would also be converted to this format
 162 * 0 = 1Mbps; 1 = 2Mbps; 2 = 5.5Mbps; 3 = 11Mbps
 163 */
 164static const struct
 165legacy_phycfg legacy_phycfg_table[LEGACY_PHYCFG_TABLE_SIZE] = {
 166        {BRCM_RATE_1M, 0x00},   /* CCK  1Mbps,  data rate  0 */
 167        {BRCM_RATE_2M, 0x08},   /* CCK  2Mbps,  data rate  1 */
 168        {BRCM_RATE_5M5, 0x10},  /* CCK  5.5Mbps,  data rate  2 */
 169        {BRCM_RATE_11M, 0x18},  /* CCK  11Mbps,  data rate   3 */
 170        /* OFDM  6Mbps,  code rate 1/2, BPSK,   1 spatial stream */
 171        {BRCM_RATE_6M, 0x00},
 172        /* OFDM  9Mbps,  code rate 3/4, BPSK,   1 spatial stream */
 173        {BRCM_RATE_9M, 0x02},
 174        /* OFDM  12Mbps, code rate 1/2, QPSK,   1 spatial stream */
 175        {BRCM_RATE_12M, 0x08},
 176        /* OFDM  18Mbps, code rate 3/4, QPSK,   1 spatial stream */
 177        {BRCM_RATE_18M, 0x0A},
 178        /* OFDM  24Mbps, code rate 1/2, 16-QAM, 1 spatial stream */
 179        {BRCM_RATE_24M, 0x10},
 180        /* OFDM  36Mbps, code rate 3/4, 16-QAM, 1 spatial stream */
 181        {BRCM_RATE_36M, 0x12},
 182        /* OFDM  48Mbps, code rate 2/3, 64-QAM, 1 spatial stream */
 183        {BRCM_RATE_48M, 0x19},
 184        /* OFDM  54Mbps, code rate 3/4, 64-QAM, 1 spatial stream */
 185        {BRCM_RATE_54M, 0x1A},
 186};
 187
 188/* Hardware rates (also encodes default basic rates) */
 189
 190const struct brcms_c_rateset cck_ofdm_mimo_rates = {
 191        12,
 192        /*  1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48, */
 193        { 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
 194        /* 54 Mbps */
 195          0x6c},
 196        0x00,
 197        { 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 198          0x00, 0x00, 0x00, 0x00, 0x00}
 199};
 200
 201const struct brcms_c_rateset ofdm_mimo_rates = {
 202        8,
 203        /*  6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
 204        { 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
 205        0x00,
 206        { 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 207          0x00, 0x00, 0x00, 0x00, 0x00}
 208};
 209
 210/* Default ratesets that include MCS32 for 40BW channels */
 211static const struct brcms_c_rateset cck_ofdm_40bw_mimo_rates = {
 212        12,
 213        /*  1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48 */
 214        { 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
 215        /* 54 Mbps */
 216          0x6c},
 217        0x00,
 218        { 0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 219          0x00, 0x00, 0x00, 0x00, 0x00}
 220};
 221
 222static const struct brcms_c_rateset ofdm_40bw_mimo_rates = {
 223        8,
 224        /*  6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
 225        { 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
 226        0x00,
 227        { 0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 228          0x00, 0x00, 0x00, 0x00, 0x00}
 229};
 230
 231const struct brcms_c_rateset cck_ofdm_rates = {
 232        12,
 233        /*  1b,   2b, 5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,*/
 234        { 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
 235        /*54 Mbps */
 236          0x6c},
 237        0x00,
 238        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 239          0x00, 0x00, 0x00, 0x00, 0x00}
 240};
 241
 242const struct brcms_c_rateset gphy_legacy_rates = {
 243        4,
 244        /*  1b,   2b,   5.5b, 11b Mbps */
 245        { 0x82, 0x84, 0x8b, 0x96},
 246        0x00,
 247        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 248          0x00, 0x00, 0x00, 0x00, 0x00}
 249};
 250
 251const struct brcms_c_rateset ofdm_rates = {
 252        8,
 253        /*  6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
 254        { 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
 255        0x00,
 256        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 257          0x00, 0x00, 0x00, 0x00, 0x00}
 258};
 259
 260const struct brcms_c_rateset cck_rates = {
 261        4,
 262        /*  1b,   2b,   5.5,  11 Mbps */
 263        { 0x82, 0x84, 0x0b, 0x16},
 264        0x00,
 265        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 266          0x00, 0x00, 0x00, 0x00, 0x00}
 267};
 268
 269/* check if rateset is valid.
 270 * if check_brate is true, rateset without a basic rate is considered NOT valid.
 271 */
 272static bool brcms_c_rateset_valid(struct brcms_c_rateset *rs, bool check_brate)
 273{
 274        uint idx;
 275
 276        if (!rs->count)
 277                return false;
 278
 279        if (!check_brate)
 280                return true;
 281
 282        /* error if no basic rates */
 283        for (idx = 0; idx < rs->count; idx++) {
 284                if (rs->rates[idx] & BRCMS_RATE_FLAG)
 285                        return true;
 286        }
 287        return false;
 288}
 289
 290void brcms_c_rateset_mcs_upd(struct brcms_c_rateset *rs, u8 txstreams)
 291{
 292        int i;
 293        for (i = txstreams; i < MAX_STREAMS_SUPPORTED; i++)
 294                rs->mcs[i] = 0;
 295}
 296
 297/*
 298 * filter based on hardware rateset, and sort filtered rateset with basic
 299 * bit(s) preserved, and check if resulting rateset is valid.
 300*/
 301bool
 302brcms_c_rate_hwrs_filter_sort_validate(struct brcms_c_rateset *rs,
 303                                   const struct brcms_c_rateset *hw_rs,
 304                                   bool check_brate, u8 txstreams)
 305{
 306        u8 rateset[BRCM_MAXRATE + 1];
 307        u8 r;
 308        uint count;
 309        uint i;
 310
 311        memset(rateset, 0, sizeof(rateset));
 312        count = rs->count;
 313
 314        for (i = 0; i < count; i++) {
 315                /* mask off "basic rate" bit, BRCMS_RATE_FLAG */
 316                r = (int)rs->rates[i] & BRCMS_RATE_MASK;
 317                if ((r > BRCM_MAXRATE) || (rate_info[r] == 0))
 318                        continue;
 319                rateset[r] = rs->rates[i];      /* preserve basic bit! */
 320        }
 321
 322        /* fill out the rates in order, looking at only supported rates */
 323        count = 0;
 324        for (i = 0; i < hw_rs->count; i++) {
 325                r = hw_rs->rates[i] & BRCMS_RATE_MASK;
 326                if (rateset[r])
 327                        rs->rates[count++] = rateset[r];
 328        }
 329
 330        rs->count = count;
 331
 332        /* only set the mcs rate bit if the equivalent hw mcs bit is set */
 333        for (i = 0; i < MCSSET_LEN; i++)
 334                rs->mcs[i] = (rs->mcs[i] & hw_rs->mcs[i]);
 335
 336        if (brcms_c_rateset_valid(rs, check_brate))
 337                return true;
 338        else
 339                return false;
 340}
 341
 342/* calculate the rate of a rx'd frame and return it as a ratespec */
 343u32 brcms_c_compute_rspec(struct d11rxhdr *rxh, u8 *plcp)
 344{
 345        int phy_type;
 346        u32 rspec = PHY_TXC1_BW_20MHZ << RSPEC_BW_SHIFT;
 347
 348        phy_type =
 349            ((rxh->RxChan & RXS_CHAN_PHYTYPE_MASK) >> RXS_CHAN_PHYTYPE_SHIFT);
 350
 351        if ((phy_type == PHY_TYPE_N) || (phy_type == PHY_TYPE_SSN) ||
 352            (phy_type == PHY_TYPE_LCN) || (phy_type == PHY_TYPE_HT)) {
 353                switch (rxh->PhyRxStatus_0 & PRXS0_FT_MASK) {
 354                case PRXS0_CCK:
 355                        rspec =
 356                                cck_phy2mac_rate(
 357                                ((struct cck_phy_hdr *) plcp)->signal);
 358                        break;
 359                case PRXS0_OFDM:
 360                        rspec =
 361                            ofdm_phy2mac_rate(
 362                                ((struct ofdm_phy_hdr *) plcp)->rlpt[0]);
 363                        break;
 364                case PRXS0_PREN:
 365                        rspec = (plcp[0] & MIMO_PLCP_MCS_MASK) | RSPEC_MIMORATE;
 366                        if (plcp[0] & MIMO_PLCP_40MHZ) {
 367                                /* indicate rspec is for 40 MHz mode */
 368                                rspec &= ~RSPEC_BW_MASK;
 369                                rspec |= (PHY_TXC1_BW_40MHZ << RSPEC_BW_SHIFT);
 370                        }
 371                        break;
 372                case PRXS0_STDN:
 373                        /* fallthru */
 374                default:
 375                        /* not supported, error condition */
 376                        break;
 377                }
 378                if (plcp3_issgi(plcp[3]))
 379                        rspec |= RSPEC_SHORT_GI;
 380        } else
 381            if ((phy_type == PHY_TYPE_A) || (rxh->PhyRxStatus_0 & PRXS0_OFDM))
 382                rspec = ofdm_phy2mac_rate(
 383                                ((struct ofdm_phy_hdr *) plcp)->rlpt[0]);
 384        else
 385                rspec = cck_phy2mac_rate(
 386                                ((struct cck_phy_hdr *) plcp)->signal);
 387
 388        return rspec;
 389}
 390
 391/* copy rateset src to dst as-is (no masking or sorting) */
 392void brcms_c_rateset_copy(const struct brcms_c_rateset *src,
 393                          struct brcms_c_rateset *dst)
 394{
 395        memcpy(dst, src, sizeof(struct brcms_c_rateset));
 396}
 397
 398/*
 399 * Copy and selectively filter one rateset to another.
 400 * 'basic_only' means only copy basic rates.
 401 * 'rates' indicates cck (11b) and ofdm rates combinations.
 402 *    - 0: cck and ofdm
 403 *    - 1: cck only
 404 *    - 2: ofdm only
 405 * 'xmask' is the copy mask (typically 0x7f or 0xff).
 406 */
 407void
 408brcms_c_rateset_filter(struct brcms_c_rateset *src, struct brcms_c_rateset *dst,
 409                       bool basic_only, u8 rates, uint xmask, bool mcsallow)
 410{
 411        uint i;
 412        uint r;
 413        uint count;
 414
 415        count = 0;
 416        for (i = 0; i < src->count; i++) {
 417                r = src->rates[i];
 418                if (basic_only && !(r & BRCMS_RATE_FLAG))
 419                        continue;
 420                if (rates == BRCMS_RATES_CCK &&
 421                    is_ofdm_rate((r & BRCMS_RATE_MASK)))
 422                        continue;
 423                if (rates == BRCMS_RATES_OFDM &&
 424                    is_cck_rate((r & BRCMS_RATE_MASK)))
 425                        continue;
 426                dst->rates[count++] = r & xmask;
 427        }
 428        dst->count = count;
 429        dst->htphy_membership = src->htphy_membership;
 430
 431        if (mcsallow && rates != BRCMS_RATES_CCK)
 432                memcpy(&dst->mcs[0], &src->mcs[0], MCSSET_LEN);
 433        else
 434                brcms_c_rateset_mcs_clear(dst);
 435}
 436
 437/* select rateset for a given phy_type and bandtype and filter it, sort it
 438 * and fill rs_tgt with result
 439 */
 440void
 441brcms_c_rateset_default(struct brcms_c_rateset *rs_tgt,
 442                        const struct brcms_c_rateset *rs_hw,
 443                        uint phy_type, int bandtype, bool cck_only,
 444                        uint rate_mask, bool mcsallow, u8 bw, u8 txstreams)
 445{
 446        const struct brcms_c_rateset *rs_dflt;
 447        struct brcms_c_rateset rs_sel;
 448        if ((PHYTYPE_IS(phy_type, PHY_TYPE_HT)) ||
 449            (PHYTYPE_IS(phy_type, PHY_TYPE_N)) ||
 450            (PHYTYPE_IS(phy_type, PHY_TYPE_LCN)) ||
 451            (PHYTYPE_IS(phy_type, PHY_TYPE_SSN))) {
 452                if (bandtype == BRCM_BAND_5G)
 453                        rs_dflt = (bw == BRCMS_20_MHZ ?
 454                                   &ofdm_mimo_rates : &ofdm_40bw_mimo_rates);
 455                else
 456                        rs_dflt = (bw == BRCMS_20_MHZ ?
 457                                   &cck_ofdm_mimo_rates :
 458                                   &cck_ofdm_40bw_mimo_rates);
 459        } else if (PHYTYPE_IS(phy_type, PHY_TYPE_LP)) {
 460                rs_dflt = (bandtype == BRCM_BAND_5G) ?
 461                          &ofdm_rates : &cck_ofdm_rates;
 462        } else if (PHYTYPE_IS(phy_type, PHY_TYPE_A)) {
 463                rs_dflt = &ofdm_rates;
 464        } else if (PHYTYPE_IS(phy_type, PHY_TYPE_G)) {
 465                rs_dflt = &cck_ofdm_rates;
 466        } else {
 467                /* should not happen, error condition */
 468                rs_dflt = &cck_rates;   /* force cck */
 469        }
 470
 471        /* if hw rateset is not supplied, assign selected rateset to it */
 472        if (!rs_hw)
 473                rs_hw = rs_dflt;
 474
 475        brcms_c_rateset_copy(rs_dflt, &rs_sel);
 476        brcms_c_rateset_mcs_upd(&rs_sel, txstreams);
 477        brcms_c_rateset_filter(&rs_sel, rs_tgt, false,
 478                           cck_only ? BRCMS_RATES_CCK : BRCMS_RATES_CCK_OFDM,
 479                           rate_mask, mcsallow);
 480        brcms_c_rate_hwrs_filter_sort_validate(rs_tgt, rs_hw, false,
 481                                           mcsallow ? txstreams : 1);
 482}
 483
 484s16 brcms_c_rate_legacy_phyctl(uint rate)
 485{
 486        uint i;
 487        for (i = 0; i < LEGACY_PHYCFG_TABLE_SIZE; i++)
 488                if (rate == legacy_phycfg_table[i].rate_ofdm)
 489                        return legacy_phycfg_table[i].tx_phy_ctl3;
 490
 491        return -1;
 492}
 493
 494void brcms_c_rateset_mcs_clear(struct brcms_c_rateset *rateset)
 495{
 496        uint i;
 497        for (i = 0; i < MCSSET_LEN; i++)
 498                rateset->mcs[i] = 0;
 499}
 500
 501void brcms_c_rateset_mcs_build(struct brcms_c_rateset *rateset, u8 txstreams)
 502{
 503        memcpy(&rateset->mcs[0], &cck_ofdm_mimo_rates.mcs[0], MCSSET_LEN);
 504        brcms_c_rateset_mcs_upd(rateset, txstreams);
 505}
 506
 507/* Based on bandwidth passed, allow/disallow MCS 32 in the rateset */
 508void brcms_c_rateset_bw_mcs_filter(struct brcms_c_rateset *rateset, u8 bw)
 509{
 510        if (bw == BRCMS_40_MHZ)
 511                setbit(rateset->mcs, 32);
 512        else
 513                clrbit(rateset->mcs, 32);
 514}
 515