drivers/staging/brcm80211/brcmsmac/antsel.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 <linux/slab.h>
  18 #include <net/mac80211.h>
  19
  20 #include "types.h"
  21 #include "bmac.h"
  22 #include "main.h"
  23 #include "phy_shim.h"
  24 #include "antsel.h"
  25
  26 #define ANT_SELCFG_AUTO         0x80    /* bit indicates antenna sel AUTO */
  27 #define ANT_SELCFG_MASK         0x33    /* antenna configuration mask */
  28 #define ANT_SELCFG_TX_UNICAST   0       /* unicast tx antenna configuration */
  29 #define ANT_SELCFG_RX_UNICAST   1       /* unicast rx antenna configuration */
  30 #define ANT_SELCFG_TX_DEF       2       /* default tx antenna configuration */
  31 #define ANT_SELCFG_RX_DEF       3       /* default rx antenna configuration */
  32
  33 /* useful macros */
  34 #define WLC_ANTSEL_11N_0(ant)   ((((ant) & ANT_SELCFG_MASK) >> 4) & 0xf)
  35 #define WLC_ANTSEL_11N_1(ant)   (((ant) & ANT_SELCFG_MASK) & 0xf)
  36 #define WLC_ANTIDX_11N(ant)     (((WLC_ANTSEL_11N_0(ant)) << 2) + (WLC_ANTSEL_11N_1(ant)))
  37 #define WLC_ANT_ISAUTO_11N(ant) (((ant) & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO)
  38 #define WLC_ANTSEL_11N(ant)     ((ant) & ANT_SELCFG_MASK)
  39
  40 /* antenna switch */
  41 /* defines for no boardlevel antenna diversity */
  42 #define ANT_SELCFG_DEF_2x2      0x01    /* default antenna configuration */
  43
  44 /* 2x3 antdiv defines and tables for GPIO communication */
  45 #define ANT_SELCFG_NUM_2x3      3
  46 #define ANT_SELCFG_DEF_2x3      0x01    /* default antenna configuration */
  47
  48 /* 2x4 antdiv rev4 defines and tables for GPIO communication */
  49 #define ANT_SELCFG_NUM_2x4      4
  50 #define ANT_SELCFG_DEF_2x4      0x02    /* default antenna configuration */
  51
  52 /* static functions */
  53 static int wlc_antsel_cfgupd(struct antsel_info *asi, wlc_antselcfg_t *antsel);
  54 static u8 wlc_antsel_id2antcfg(struct antsel_info *asi, u8 id);
  55 static u16 wlc_antsel_antcfg2antsel(struct antsel_info *asi, u8 ant_cfg);
  56 static void wlc_antsel_init_cfg(struct antsel_info *asi,
  57                                 wlc_antselcfg_t *antsel,
  58                                 bool auto_sel);
  59
  60 const u16 mimo_2x4_div_antselpat_tbl[] = {
  61         0, 0, 0x9, 0xa,         /* ant0: 0 ant1: 2,3 */
  62         0, 0, 0x5, 0x6,         /* ant0: 1 ant1: 2,3 */
  63         0, 0, 0, 0,             /* n.a.              */
  64         0, 0, 0, 0              /* n.a.              */
  65 };
  66
  67 const u8 mimo_2x4_div_antselid_tbl[16] = {
  68         0, 0, 0, 0, 0, 2, 3, 0,
  69         0, 0, 1, 0, 0, 0, 0, 0  /* pat to antselid */
  70 };
  71
  72 const u16 mimo_2x3_div_antselpat_tbl[] = {
  73         16, 0, 1, 16,           /* ant0: 0 ant1: 1,2 */
  74         16, 16, 16, 16,         /* n.a.              */
  75         16, 2, 16, 16,          /* ant0: 2 ant1: 1   */
  76         16, 16, 16, 16          /* n.a.              */
  77 };
  78
  79 const u8 mimo_2x3_div_antselid_tbl[16] = {
  80         0, 1, 2, 0, 0, 0, 0, 0,
  81         0, 0, 0, 0, 0, 0, 0, 0  /* pat to antselid */
  82 };
  83
  84 struct antsel_info *wlc_antsel_attach(struct brcms_c_info *wlc)
  85 {
  86         struct antsel_info *asi;
  87
  88         asi = kzalloc(sizeof(struct antsel_info), GFP_ATOMIC);
  89         if (!asi) {
  90                 wiphy_err(wlc->wiphy, "wl%d: wlc_antsel_attach: out of mem\n",
  91                           wlc->pub->unit);
  92                 return NULL;
  93         }
  94
  95         asi->wlc = wlc;
  96         asi->pub = wlc->pub;
  97         asi->antsel_type = ANTSEL_NA;
  98         asi->antsel_avail = false;
  99         asi->antsel_antswitch = (u8) getintvar(asi->pub->vars, "antswitch");
 100
 101         if ((asi->pub->sromrev >= 4) && (asi->antsel_antswitch != 0)) {
 102                 switch (asi->antsel_antswitch) {
 103                 case ANTSWITCH_TYPE_1:
 104                 case ANTSWITCH_TYPE_2:
 105                 case ANTSWITCH_TYPE_3:
 106                         /* 4321/2 board with 2x3 switch logic */
 107                         asi->antsel_type = ANTSEL_2x3;
 108                         /* Antenna selection availability */
 109                         if (((u16) getintvar(asi->pub->vars, "aa2g") == 7) ||
 110                             ((u16) getintvar(asi->pub->vars, "aa5g") == 7)) {
 111                                 asi->antsel_avail = true;
 112                         } else
 113                             if (((u16) getintvar(asi->pub->vars, "aa2g") ==
 114                                  3)
 115                                 || ((u16) getintvar(asi->pub->vars, "aa5g")
 116                                     == 3)) {
 117                                 asi->antsel_avail = false;
 118                         } else {
 119                                 asi->antsel_avail = false;
 120                                 wiphy_err(wlc->wiphy, "wlc_antsel_attach: 2o3 "
 121                                           "board cfg invalid\n");
 122                         }
 123                         break;
 124                 default:
 125                         break;
 126                 }
 127         } else if ((asi->pub->sromrev == 4) &&
 128                    ((u16) getintvar(asi->pub->vars, "aa2g") == 7) &&
 129                    ((u16) getintvar(asi->pub->vars, "aa5g") == 0)) {
 130                 /* hack to match old 4321CB2 cards with 2of3 antenna switch */
 131                 asi->antsel_type = ANTSEL_2x3;
 132                 asi->antsel_avail = true;
 133         } else if (asi->pub->boardflags2 & BFL2_2X4_DIV) {
 134                 asi->antsel_type = ANTSEL_2x4;
 135                 asi->antsel_avail = true;
 136         }
 137
 138         /* Set the antenna selection type for the low driver */
 139         brcms_b_antsel_type_set(wlc->hw, asi->antsel_type);
 140
 141         /* Init (auto/manual) antenna selection */
 142         wlc_antsel_init_cfg(asi, &asi->antcfg_11n, true);
 143         wlc_antsel_init_cfg(asi, &asi->antcfg_cur, true);
 144
 145         return asi;
 146 }
 147
 148 void wlc_antsel_detach(struct antsel_info *asi)
 149 {
 150         kfree(asi);
 151 }
 152
 153 void wlc_antsel_init(struct antsel_info *asi)
 154 {
 155         if ((asi->antsel_type == ANTSEL_2x3) ||
 156             (asi->antsel_type == ANTSEL_2x4))
 157                 wlc_antsel_cfgupd(asi, &asi->antcfg_11n);
 158 }
 159
 160 /* boardlevel antenna selection: init antenna selection structure */
 161 static void
 162 wlc_antsel_init_cfg(struct antsel_info *asi, wlc_antselcfg_t *antsel,
 163                     bool auto_sel)
 164 {
 165         if (asi->antsel_type == ANTSEL_2x3) {
 166                 u8 antcfg_def = ANT_SELCFG_DEF_2x3 |
 167                     ((asi->antsel_avail && auto_sel) ? ANT_SELCFG_AUTO : 0);
 168                 antsel->ant_config[ANT_SELCFG_TX_DEF] = antcfg_def;
 169                 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = antcfg_def;
 170                 antsel->ant_config[ANT_SELCFG_RX_DEF] = antcfg_def;
 171                 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = antcfg_def;
 172                 antsel->num_antcfg = ANT_SELCFG_NUM_2x3;
 173
 174         } else if (asi->antsel_type == ANTSEL_2x4) {
 175
 176                 antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x4;
 177                 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x4;
 178                 antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x4;
 179                 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x4;
 180                 antsel->num_antcfg = ANT_SELCFG_NUM_2x4;
 181
 182         } else {                /* no antenna selection available */
 183
 184                 antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x2;
 185                 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x2;
 186                 antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x2;
 187                 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x2;
 188                 antsel->num_antcfg = 0;
 189         }
 190 }
 191
 192 void
 193 wlc_antsel_antcfg_get(struct antsel_info *asi, bool usedef, bool sel,
 194                       u8 antselid, u8 fbantselid, u8 *antcfg,
 195                       u8 *fbantcfg)
 196 {
 197         u8 ant;
 198
 199         /* if use default, assign it and return */
 200         if (usedef) {
 201                 *antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_DEF];
 202                 *fbantcfg = *antcfg;
 203                 return;
 204         }
 205
 206         if (!sel) {
 207                 *antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
 208                 *fbantcfg = *antcfg;
 209
 210         } else {
 211                 ant = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
 212                 if ((ant & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO) {
 213                         *antcfg = wlc_antsel_id2antcfg(asi, antselid);
 214                         *fbantcfg = wlc_antsel_id2antcfg(asi, fbantselid);
 215                 } else {
 216                         *antcfg =
 217                             asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
 218                         *fbantcfg = *antcfg;
 219                 }
 220         }
 221         return;
 222 }
 223
 224 /* boardlevel antenna selection: convert mimo_antsel (ucode interface) to id */
 225 u8 wlc_antsel_antsel2id(struct antsel_info *asi, u16 antsel)
 226 {
 227         u8 antselid = 0;
 228
 229         if (asi->antsel_type == ANTSEL_2x4) {
 230                 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
 231                 antselid = mimo_2x4_div_antselid_tbl[(antsel & 0xf)];
 232                 return antselid;
 233
 234         } else if (asi->antsel_type == ANTSEL_2x3) {
 235                 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
 236                 antselid = mimo_2x3_div_antselid_tbl[(antsel & 0xf)];
 237                 return antselid;
 238         }
 239
 240         return antselid;
 241 }
 242
 243 /* boardlevel antenna selection: convert id to ant_cfg */
 244 static u8 wlc_antsel_id2antcfg(struct antsel_info *asi, u8 id)
 245 {
 246         u8 antcfg = ANT_SELCFG_DEF_2x2;
 247
 248         if (asi->antsel_type == ANTSEL_2x4) {
 249                 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
 250                 antcfg = (((id & 0x2) << 3) | ((id & 0x1) + 2));
 251                 return antcfg;
 252
 253         } else if (asi->antsel_type == ANTSEL_2x3) {
 254                 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
 255                 antcfg = (((id & 0x02) << 4) | ((id & 0x1) + 1));
 256                 return antcfg;
 257         }
 258
 259         return antcfg;
 260 }
 261
 262 /* boardlevel antenna selection: convert ant_cfg to mimo_antsel (ucode interface) */
 263 static u16 wlc_antsel_antcfg2antsel(struct antsel_info *asi, u8 ant_cfg)
 264 {
 265         u8 idx = WLC_ANTIDX_11N(WLC_ANTSEL_11N(ant_cfg));
 266         u16 mimo_antsel = 0;
 267
 268         if (asi->antsel_type == ANTSEL_2x4) {
 269                 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
 270                 mimo_antsel = (mimo_2x4_div_antselpat_tbl[idx] & 0xf);
 271                 return mimo_antsel;
 272
 273         } else if (asi->antsel_type == ANTSEL_2x3) {
 274                 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
 275                 mimo_antsel = (mimo_2x3_div_antselpat_tbl[idx] & 0xf);
 276                 return mimo_antsel;
 277         }
 278
 279         return mimo_antsel;
 280 }
 281
 282 /* boardlevel antenna selection: ucode interface control */
 283 static int wlc_antsel_cfgupd(struct antsel_info *asi, wlc_antselcfg_t *antsel)
 284 {
 285         struct brcms_c_info *wlc = asi->wlc;
 286         u8 ant_cfg;
 287         u16 mimo_antsel;
 288
 289         /* 1) Update TX antconfig for all frames that are not unicast data
 290          *    (aka default TX)
 291          */
 292         ant_cfg = antsel->ant_config[ANT_SELCFG_TX_DEF];
 293         mimo_antsel = wlc_antsel_antcfg2antsel(asi, ant_cfg);
 294         brcms_c_write_shm(wlc, M_MIMO_ANTSEL_TXDFLT, mimo_antsel);
 295         /* Update driver stats for currently selected default tx/rx antenna config */
 296         asi->antcfg_cur.ant_config[ANT_SELCFG_TX_DEF] = ant_cfg;
 297
 298         /* 2) Update RX antconfig for all frames that are not unicast data
 299          *    (aka default RX)
 300          */
 301         ant_cfg = antsel->ant_config[ANT_SELCFG_RX_DEF];
 302         mimo_antsel = wlc_antsel_antcfg2antsel(asi, ant_cfg);
 303         brcms_c_write_shm(wlc, M_MIMO_ANTSEL_RXDFLT, mimo_antsel);
 304         /* Update driver stats for currently selected default tx/rx antenna config */
 305         asi->antcfg_cur.ant_config[ANT_SELCFG_RX_DEF] = ant_cfg;
 306
 307         return 0;
 308 }