root/drivers/net/wireless/broadcom/brcm80211/brcmsmac/rate.c

DEFINITIONS

1. brcms_c_rateset_valid
2. brcms_c_rateset_mcs_upd
3. brcms_c_rate_hwrs_filter_sort_validate
4. brcms_c_compute_rspec
5. brcms_c_rateset_copy
6. brcms_c_rateset_filter
7. brcms_c_rateset_default
8. brcms_c_rate_legacy_phyctl
9. brcms_c_rateset_mcs_clear
10. brcms_c_rateset_mcs_build
11. brcms_c_rateset_bw_mcs_filter

   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  */
  28 const 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 */
  44 const 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  */
 150 struct 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  */
 164 static const struct
 165 legacy_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 
 190 const 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 
 201 const 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 */
 211 static 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 
 222 static 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 
 231 const 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 
 242 const 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 
 251 const 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 
 260 const 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  */
 272 static 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 
 290 void 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 */
 301 bool
 302 brcms_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 */
 343 u32 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) */
 392 void 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  */
 407 void
 408 brcms_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  */
 440 void
 441 brcms_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 
 484 s16 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 
 494 void 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 
 501 void 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 */
 508 void 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 }