drivers/staging/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 /* Rate info per rate: It tells whether a rate is ofdm or not and its phy_rate value */
  25 const u8 rate_info[BRCM_MAXRATE + 1] = {
  26         /*  0     1     2     3     4     5     6     7     8     9 */
  27 /*   0 */ 0x00, 0x00, 0x0a, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00,
  28 /*  10 */ 0x00, 0x37, 0x8b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8f, 0x00,
  29 /*  20 */ 0x00, 0x00, 0x6e, 0x00, 0x8a, 0x00, 0x00, 0x00, 0x00, 0x00,
  30 /*  30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8e, 0x00, 0x00, 0x00,
  31 /*  40 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x89, 0x00,
  32 /*  50 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  33 /*  60 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  34 /*  70 */ 0x00, 0x00, 0x8d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  35 /*  80 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  36 /*  90 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, 0x00, 0x00,
  37 /* 100 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8c
  38 };
  39
  40 /* rates are in units of Kbps */
  41 const struct brcms_mcs_info mcs_table[MCS_TABLE_SIZE] = {
  42         /* MCS  0: SS 1, MOD: BPSK,  CR 1/2 */
  43         {6500, 13500, CEIL(6500 * 10, 9), CEIL(13500 * 10, 9), 0x00,
  44          BRCM_RATE_6M},
  45         /* MCS  1: SS 1, MOD: QPSK,  CR 1/2 */
  46         {13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x08,
  47          BRCM_RATE_12M},
  48         /* MCS  2: SS 1, MOD: QPSK,  CR 3/4 */
  49         {19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x0A,
  50          BRCM_RATE_18M},
  51         /* MCS  3: SS 1, MOD: 16QAM, CR 1/2 */
  52         {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x10,
  53          BRCM_RATE_24M},
  54         /* MCS  4: SS 1, MOD: 16QAM, CR 3/4 */
  55         {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x12,
  56          BRCM_RATE_36M},
  57         /* MCS  5: SS 1, MOD: 64QAM, CR 2/3 */
  58         {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x19,
  59          BRCM_RATE_48M},
  60         /* MCS  6: SS 1, MOD: 64QAM, CR 3/4 */
  61         {58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x1A,
  62          BRCM_RATE_54M},
  63         /* MCS  7: SS 1, MOD: 64QAM, CR 5/6 */
  64         {65000, 135000, CEIL(65000 * 10, 9), CEIL(135000 * 10, 9), 0x1C,
  65          BRCM_RATE_54M},
  66         /* MCS  8: SS 2, MOD: BPSK,  CR 1/2 */
  67         {13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x40,
  68          BRCM_RATE_6M},
  69         /* MCS  9: SS 2, MOD: QPSK,  CR 1/2 */
  70         {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x48,
  71          BRCM_RATE_12M},
  72         /* MCS 10: SS 2, MOD: QPSK,  CR 3/4 */
  73         {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x4A,
  74          BRCM_RATE_18M},
  75         /* MCS 11: SS 2, MOD: 16QAM, CR 1/2 */
  76         {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x50,
  77          BRCM_RATE_24M},
  78         /* MCS 12: SS 2, MOD: 16QAM, CR 3/4 */
  79         {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x52,
  80          BRCM_RATE_36M},
  81         /* MCS 13: SS 2, MOD: 64QAM, CR 2/3 */
  82         {104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0x59,
  83          BRCM_RATE_48M},
  84         /* MCS 14: SS 2, MOD: 64QAM, CR 3/4 */
  85         {117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x5A,
  86          BRCM_RATE_54M},
  87         /* MCS 15: SS 2, MOD: 64QAM, CR 5/6 */
  88         {130000, 270000, CEIL(130000 * 10, 9), CEIL(270000 * 10, 9), 0x5C,
  89          BRCM_RATE_54M},
  90         /* MCS 16: SS 3, MOD: BPSK,  CR 1/2 */
  91         {19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x80,
  92          BRCM_RATE_6M},
  93         /* MCS 17: SS 3, MOD: QPSK,  CR 1/2 */
  94         {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x88,
  95          BRCM_RATE_12M},
  96         /* MCS 18: SS 3, MOD: QPSK,  CR 3/4 */
  97         {58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x8A,
  98          BRCM_RATE_18M},
  99         /* MCS 19: SS 3, MOD: 16QAM, CR 1/2 */
 100         {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x90,
 101          BRCM_RATE_24M},
 102         /* MCS 20: SS 3, MOD: 16QAM, CR 3/4 */
 103         {117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x92,
 104          BRCM_RATE_36M},
 105         /* MCS 21: SS 3, MOD: 64QAM, CR 2/3 */
 106         {156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0x99,
 107          BRCM_RATE_48M},
 108         /* MCS 22: SS 3, MOD: 64QAM, CR 3/4 */
 109         {175500, 364500, CEIL(175500 * 10, 9), CEIL(364500 * 10, 9), 0x9A,
 110          BRCM_RATE_54M},
 111         /* MCS 23: SS 3, MOD: 64QAM, CR 5/6 */
 112         {195000, 405000, CEIL(195000 * 10, 9), CEIL(405000 * 10, 9), 0x9B,
 113          BRCM_RATE_54M},
 114         /* MCS 24: SS 4, MOD: BPSK,  CR 1/2 */
 115         {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0xC0,
 116          BRCM_RATE_6M},
 117         /* MCS 25: SS 4, MOD: QPSK,  CR 1/2 */
 118         {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0xC8,
 119          BRCM_RATE_12M},
 120         /* MCS 26: SS 4, MOD: QPSK,  CR 3/4 */
 121         {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0xCA,
 122          BRCM_RATE_18M},
 123         /* MCS 27: SS 4, MOD: 16QAM, CR 1/2 */
 124         {104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0xD0,
 125          BRCM_RATE_24M},
 126         /* MCS 28: SS 4, MOD: 16QAM, CR 3/4 */
 127         {156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0xD2,
 128          BRCM_RATE_36M},
 129         /* MCS 29: SS 4, MOD: 64QAM, CR 2/3 */
 130         {208000, 432000, CEIL(208000 * 10, 9), CEIL(432000 * 10, 9), 0xD9,
 131          BRCM_RATE_48M},
 132         /* MCS 30: SS 4, MOD: 64QAM, CR 3/4 */
 133         {234000, 486000, CEIL(234000 * 10, 9), CEIL(486000 * 10, 9), 0xDA,
 134          BRCM_RATE_54M},
 135         /* MCS 31: SS 4, MOD: 64QAM, CR 5/6 */
 136         {260000, 540000, CEIL(260000 * 10, 9), CEIL(540000 * 10, 9), 0xDB,
 137          BRCM_RATE_54M},
 138         /* MCS 32: SS 1, MOD: BPSK,  CR 1/2 */
 139         {0, 6000, 0, CEIL(6000 * 10, 9), 0x00, BRCM_RATE_6M},
 140 };
 141
 142 /* phycfg for legacy OFDM frames: code rate, modulation scheme, spatial streams
 143  *   Number of spatial streams: always 1
 144  *   other fields: refer to table 78 of section 17.3.2.2 of the original .11a standard
 145  */
 146 struct legacy_phycfg {
 147         u32 rate_ofdm;  /* ofdm mac rate */
 148         u8 tx_phy_ctl3; /* phy ctl byte 3, code rate, modulation type, # of streams */
 149 };
 150
 151 #define LEGACY_PHYCFG_TABLE_SIZE        12      /* Number of legacy_rate_cfg entries in the table */
 152
 153 /* In CCK mode LPPHY overloads OFDM Modulation bits with CCK Data Rate */
 154 /* Eventually MIMOPHY would also be converted to this format */
 155 /* 0 = 1Mbps; 1 = 2Mbps; 2 = 5.5Mbps; 3 = 11Mbps */
 156 static const struct
 157 legacy_phycfg legacy_phycfg_table[LEGACY_PHYCFG_TABLE_SIZE] = {
 158         {BRCM_RATE_1M, 0x00},   /* CCK  1Mbps,  data rate  0 */
 159         {BRCM_RATE_2M, 0x08},   /* CCK  2Mbps,  data rate  1 */
 160         {BRCM_RATE_5M5, 0x10},  /* CCK  5.5Mbps,  data rate  2 */
 161         {BRCM_RATE_11M, 0x18},  /* CCK  11Mbps,  data rate   3 */
 162         /* OFDM  6Mbps,  code rate 1/2, BPSK,   1 spatial stream */
 163         {BRCM_RATE_6M, 0x00},
 164         /* OFDM  9Mbps,  code rate 3/4, BPSK,   1 spatial stream */
 165         {BRCM_RATE_9M, 0x02},
 166         /* OFDM  12Mbps, code rate 1/2, QPSK,   1 spatial stream */
 167         {BRCM_RATE_12M, 0x08},
 168         /* OFDM  18Mbps, code rate 3/4, QPSK,   1 spatial stream */
 169         {BRCM_RATE_18M, 0x0A},
 170         /* OFDM  24Mbps, code rate 1/2, 16-QAM, 1 spatial stream */
 171         {BRCM_RATE_24M, 0x10},
 172         /* OFDM  36Mbps, code rate 3/4, 16-QAM, 1 spatial stream */
 173         {BRCM_RATE_36M, 0x12},
 174         /* OFDM  48Mbps, code rate 2/3, 64-QAM, 1 spatial stream */
 175         {BRCM_RATE_48M, 0x19},
 176         /* OFDM  54Mbps, code rate 3/4, 64-QAM, 1 spatial stream */
 177         {BRCM_RATE_54M, 0x1A},
 178 };
 179
 180 /* Hardware rates (also encodes default basic rates) */
 181
 182 const wlc_rateset_t cck_ofdm_mimo_rates = {
 183         12,
 184         {                       /*    1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,   54 Mbps */
 185          0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
 186          0x6c},
 187         0x00,
 188         {0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 189          0x00, 0x00, 0x00, 0x00}
 190 };
 191
 192 const wlc_rateset_t ofdm_mimo_rates = {
 193         8,
 194         {                       /*    6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
 195          0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
 196         0x00,
 197         {0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 198          0x00, 0x00, 0x00, 0x00}
 199 };
 200
 201 /* Default ratesets that include MCS32 for 40BW channels */
 202 const wlc_rateset_t cck_ofdm_40bw_mimo_rates = {
 203         12,
 204         {                       /*    1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,   54 Mbps */
 205          0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
 206          0x6c},
 207         0x00,
 208         {0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 209          0x00, 0x00, 0x00, 0x00}
 210 };
 211
 212 const wlc_rateset_t ofdm_40bw_mimo_rates = {
 213         8,
 214         {                       /*    6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
 215          0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
 216         0x00,
 217         {0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 218          0x00, 0x00, 0x00, 0x00}
 219 };
 220
 221 const wlc_rateset_t cck_ofdm_rates = {
 222         12,
 223         {                       /*    1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,   54 Mbps */
 224          0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
 225          0x6c},
 226         0x00,
 227         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 228          0x00, 0x00, 0x00, 0x00}
 229 };
 230
 231 const wlc_rateset_t gphy_legacy_rates = {
 232         4,
 233         {                       /*    1b,   2b,   5.5b,  11b Mbps */
 234          0x82, 0x84, 0x8b, 0x96},
 235         0x00,
 236         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 237          0x00, 0x00, 0x00, 0x00}
 238 };
 239
 240 const wlc_rateset_t ofdm_rates = {
 241         8,
 242         {                       /*    6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
 243          0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
 244         0x00,
 245         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 246          0x00, 0x00, 0x00, 0x00}
 247 };
 248
 249 const wlc_rateset_t cck_rates = {
 250         4,
 251         {                       /*    1b,   2b,   5.5,  11 Mbps */
 252          0x82, 0x84, 0x0b, 0x16},
 253         0x00,
 254         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 255          0x00, 0x00, 0x00, 0x00}
 256 };
 257
 258 /* check if rateset is valid.
 259  * if check_brate is true, rateset without a basic rate is considered NOT valid.
 260  */
 261 static bool brcms_c_rateset_valid(wlc_rateset_t *rs, bool check_brate)
 262 {
 263         uint idx;
 264
 265         if (!rs->count)
 266                 return false;
 267
 268         if (!check_brate)
 269                 return true;
 270
 271         /* error if no basic rates */
 272         for (idx = 0; idx < rs->count; idx++) {
 273                 if (rs->rates[idx] & BRCMS_RATE_FLAG)
 274                         return true;
 275         }
 276         return false;
 277 }
 278
 279 void brcms_c_rateset_mcs_upd(wlc_rateset_t *rs, u8 txstreams)
 280 {
 281         int i;
 282         for (i = txstreams; i < MAX_STREAMS_SUPPORTED; i++)
 283                 rs->mcs[i] = 0;
 284 }
 285
 286 /* filter based on hardware rateset, and sort filtered rateset with basic bit(s) preserved,
 287  * and check if resulting rateset is valid.
 288 */
 289 bool
 290 brcms_c_rate_hwrs_filter_sort_validate(wlc_rateset_t *rs,
 291                                    const wlc_rateset_t *hw_rs,
 292                                    bool check_brate, u8 txstreams)
 293 {
 294         u8 rateset[BRCM_MAXRATE + 1];
 295         u8 r;
 296         uint count;
 297         uint i;
 298
 299         memset(rateset, 0, sizeof(rateset));
 300         count = rs->count;
 301
 302         for (i = 0; i < count; i++) {
 303                 /* mask off "basic rate" bit, BRCMS_RATE_FLAG */
 304                 r = (int)rs->rates[i] & BRCMS_RATE_MASK;
 305                 if ((r > BRCM_MAXRATE) || (rate_info[r] == 0))
 306                         continue;
 307                 rateset[r] = rs->rates[i];      /* preserve basic bit! */
 308         }
 309
 310         /* fill out the rates in order, looking at only supported rates */
 311         count = 0;
 312         for (i = 0; i < hw_rs->count; i++) {
 313                 r = hw_rs->rates[i] & BRCMS_RATE_MASK;
 314                 if (rateset[r])
 315                         rs->rates[count++] = rateset[r];
 316         }
 317
 318         rs->count = count;
 319
 320         /* only set the mcs rate bit if the equivalent hw mcs bit is set */
 321         for (i = 0; i < MCSSET_LEN; i++)
 322                 rs->mcs[i] = (rs->mcs[i] & hw_rs->mcs[i]);
 323
 324         if (brcms_c_rateset_valid(rs, check_brate))
 325                 return true;
 326         else
 327                 return false;
 328 }
 329
 330 /* calculate the rate of a rx'd frame and return it as a ratespec */
 331 ratespec_t brcms_c_compute_rspec(struct d11rxhdr *rxh, u8 *plcp)
 332 {
 333         int phy_type;
 334         ratespec_t rspec = PHY_TXC1_BW_20MHZ << RSPEC_BW_SHIFT;
 335
 336         phy_type =
 337             ((rxh->RxChan & RXS_CHAN_PHYTYPE_MASK) >> RXS_CHAN_PHYTYPE_SHIFT);
 338
 339         if ((phy_type == PHY_TYPE_N) || (phy_type == PHY_TYPE_SSN) ||
 340             (phy_type == PHY_TYPE_LCN) || (phy_type == PHY_TYPE_HT)) {
 341                 switch (rxh->PhyRxStatus_0 & PRXS0_FT_MASK) {
 342                 case PRXS0_CCK:
 343                         rspec =
 344                             CCK_PHY2MAC_RATE(
 345                                 ((struct cck_phy_hdr *) plcp)->signal);
 346                         break;
 347                 case PRXS0_OFDM:
 348                         rspec =
 349                             OFDM_PHY2MAC_RATE(
 350                                 ((struct ofdm_phy_hdr *) plcp)->rlpt[0]);
 351                         break;
 352                 case PRXS0_PREN:
 353                         rspec = (plcp[0] & MIMO_PLCP_MCS_MASK) | RSPEC_MIMORATE;
 354                         if (plcp[0] & MIMO_PLCP_40MHZ) {
 355                                 /* indicate rspec is for 40 MHz mode */
 356                                 rspec &= ~RSPEC_BW_MASK;
 357                                 rspec |= (PHY_TXC1_BW_40MHZ << RSPEC_BW_SHIFT);
 358                         }
 359                         break;
 360                 case PRXS0_STDN:
 361                         /* fallthru */
 362                 default:
 363                         /* not supported, error condition */
 364                         break;
 365                 }
 366                 if (PLCP3_ISSGI(plcp[3]))
 367                         rspec |= RSPEC_SHORT_GI;
 368         } else
 369             if ((phy_type == PHY_TYPE_A) || (rxh->PhyRxStatus_0 & PRXS0_OFDM))
 370                 rspec = OFDM_PHY2MAC_RATE(
 371                                 ((struct ofdm_phy_hdr *) plcp)->rlpt[0]);
 372         else
 373                 rspec = CCK_PHY2MAC_RATE(
 374                                 ((struct cck_phy_hdr *) plcp)->signal);
 375
 376         return rspec;
 377 }
 378
 379 /* copy rateset src to dst as-is (no masking or sorting) */
 380 void brcms_c_rateset_copy(const wlc_rateset_t *src, wlc_rateset_t *dst)
 381 {
 382         memcpy(dst, src, sizeof(wlc_rateset_t));
 383 }
 384
 385 /*
 386  * Copy and selectively filter one rateset to another.
 387  * 'basic_only' means only copy basic rates.
 388  * 'rates' indicates cck (11b) and ofdm rates combinations.
 389  *    - 0: cck and ofdm
 390  *    - 1: cck only
 391  *    - 2: ofdm only
 392  * 'xmask' is the copy mask (typically 0x7f or 0xff).
 393  */
 394 void
 395 brcms_c_rateset_filter(wlc_rateset_t *src, wlc_rateset_t *dst, bool basic_only,
 396                    u8 rates, uint xmask, bool mcsallow)
 397 {
 398         uint i;
 399         uint r;
 400         uint count;
 401
 402         count = 0;
 403         for (i = 0; i < src->count; i++) {
 404                 r = src->rates[i];
 405                 if (basic_only && !(r & BRCMS_RATE_FLAG))
 406                         continue;
 407                 if (rates == BRCMS_RATES_CCK && IS_OFDM((r & BRCMS_RATE_MASK)))
 408                         continue;
 409                 if (rates == BRCMS_RATES_OFDM && IS_CCK((r & BRCMS_RATE_MASK)))
 410                         continue;
 411                 dst->rates[count++] = r & xmask;
 412         }
 413         dst->count = count;
 414         dst->htphy_membership = src->htphy_membership;
 415
 416         if (mcsallow && rates != BRCMS_RATES_CCK)
 417                 memcpy(&dst->mcs[0], &src->mcs[0], MCSSET_LEN);
 418         else
 419                 brcms_c_rateset_mcs_clear(dst);
 420 }
 421
 422 /* select rateset for a given phy_type and bandtype and filter it, sort it
 423  * and fill rs_tgt with result
 424  */
 425 void
 426 brcms_c_rateset_default(wlc_rateset_t *rs_tgt, const wlc_rateset_t *rs_hw,
 427                     uint phy_type, int bandtype, bool cck_only, uint rate_mask,
 428                     bool mcsallow, u8 bw, u8 txstreams)
 429 {
 430         const wlc_rateset_t *rs_dflt;
 431         wlc_rateset_t rs_sel;
 432         if ((PHYTYPE_IS(phy_type, PHY_TYPE_HT)) ||
 433             (PHYTYPE_IS(phy_type, PHY_TYPE_N)) ||
 434             (PHYTYPE_IS(phy_type, PHY_TYPE_LCN)) ||
 435             (PHYTYPE_IS(phy_type, PHY_TYPE_SSN))) {
 436                 if (BAND_5G(bandtype)) {
 437                         rs_dflt = (bw == BRCMS_20_MHZ ?
 438                                    &ofdm_mimo_rates : &ofdm_40bw_mimo_rates);
 439                 } else {
 440                         rs_dflt = (bw == BRCMS_20_MHZ ?
 441                                    &cck_ofdm_mimo_rates :
 442                                    &cck_ofdm_40bw_mimo_rates);
 443                 }
 444         } else if (PHYTYPE_IS(phy_type, PHY_TYPE_LP)) {
 445                 rs_dflt = (BAND_5G(bandtype)) ? &ofdm_rates : &cck_ofdm_rates;
 446         } else if (PHYTYPE_IS(phy_type, PHY_TYPE_A)) {
 447                 rs_dflt = &ofdm_rates;
 448         } else if (PHYTYPE_IS(phy_type, PHY_TYPE_G)) {
 449                 rs_dflt = &cck_ofdm_rates;
 450         } else {
 451                 /* should not happen, error condition */
 452                 rs_dflt = &cck_rates;   /* force cck */
 453         }
 454
 455         /* if hw rateset is not supplied, assign selected rateset to it */
 456         if (!rs_hw)
 457                 rs_hw = rs_dflt;
 458
 459         brcms_c_rateset_copy(rs_dflt, &rs_sel);
 460         brcms_c_rateset_mcs_upd(&rs_sel, txstreams);
 461         brcms_c_rateset_filter(&rs_sel, rs_tgt, false,
 462                            cck_only ? BRCMS_RATES_CCK : BRCMS_RATES_CCK_OFDM,
 463                            rate_mask, mcsallow);
 464         brcms_c_rate_hwrs_filter_sort_validate(rs_tgt, rs_hw, false,
 465                                            mcsallow ? txstreams : 1);
 466 }
 467
 468 s16 brcms_c_rate_legacy_phyctl(uint rate)
 469 {
 470         uint i;
 471         for (i = 0; i < LEGACY_PHYCFG_TABLE_SIZE; i++)
 472                 if (rate == legacy_phycfg_table[i].rate_ofdm)
 473                         return legacy_phycfg_table[i].tx_phy_ctl3;
 474
 475         return -1;
 476 }
 477
 478 void brcms_c_rateset_mcs_clear(wlc_rateset_t *rateset)
 479 {
 480         uint i;
 481         for (i = 0; i < MCSSET_LEN; i++)
 482                 rateset->mcs[i] = 0;
 483 }
 484
 485 void brcms_c_rateset_mcs_build(wlc_rateset_t *rateset, u8 txstreams)
 486 {
 487         memcpy(&rateset->mcs[0], &cck_ofdm_mimo_rates.mcs[0], MCSSET_LEN);
 488         brcms_c_rateset_mcs_upd(rateset, txstreams);
 489 }
 490
 491 /* Based on bandwidth passed, allow/disallow MCS 32 in the rateset */
 492 void brcms_c_rateset_bw_mcs_filter(wlc_rateset_t *rateset, u8 bw)
 493 {
 494         if (bw == BRCMS_40_MHZ)
 495                 setbit(rateset->mcs, 32);
 496         else
 497                 clrbit(rateset->mcs, 32);
 498 }