drivers/staging/brcm80211/brcmsmac/wlc_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 <wlc_cfg.h>
  18
  19 #ifdef WLANTSEL
  20
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/pci.h>
  24 #include <bcmdefs.h>
  25 #include <osl.h>
  26 #include <bcmutils.h>
  27 #include <siutils.h>
  28 #include <wlioctl.h>
  29
  30 #include <bcmdevs.h>
  31 #include <sbhndpio.h>
  32 #include <sbhnddma.h>
  33 #include <d11.h>
  34 #include <wlc_rate.h>
  35 #include <wlc_key.h>
  36 #include <wlc_pub.h>
  37 #include <wl_dbg.h>
  38 #include <wlc_mac80211.h>
  39 #include <wlc_bmac.h>
  40 #include <wlc_phy_hal.h>
  41 #include <wl_export.h>
  42 #include <wlc_antsel.h>
  43 #include <wlc_phy_shim.h>
  44
  45 /* useful macros */
  46 #define WLC_ANTSEL_11N_0(ant)   ((((ant) & ANT_SELCFG_MASK) >> 4) & 0xf)
  47 #define WLC_ANTSEL_11N_1(ant)   (((ant) & ANT_SELCFG_MASK) & 0xf)
  48 #define WLC_ANTIDX_11N(ant)     (((WLC_ANTSEL_11N_0(ant)) << 2) + (WLC_ANTSEL_11N_1(ant)))
  49 #define WLC_ANT_ISAUTO_11N(ant) (((ant) & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO)
  50 #define WLC_ANTSEL_11N(ant)     ((ant) & ANT_SELCFG_MASK)
  51
  52 /* antenna switch */
  53 /* defines for no boardlevel antenna diversity */
  54 #define ANT_SELCFG_DEF_2x2      0x01    /* default antenna configuration */
  55
  56 /* 2x3 antdiv defines and tables for GPIO communication */
  57 #define ANT_SELCFG_NUM_2x3      3
  58 #define ANT_SELCFG_DEF_2x3      0x01    /* default antenna configuration */
  59
  60 /* 2x4 antdiv rev4 defines and tables for GPIO communication */
  61 #define ANT_SELCFG_NUM_2x4      4
  62 #define ANT_SELCFG_DEF_2x4      0x02    /* default antenna configuration */
  63
  64 /* static functions */
  65 static int wlc_antsel_cfgupd(struct antsel_info *asi, wlc_antselcfg_t *antsel);
  66 static u8 wlc_antsel_id2antcfg(struct antsel_info *asi, u8 id);
  67 static u16 wlc_antsel_antcfg2antsel(struct antsel_info *asi, u8 ant_cfg);
  68 static void wlc_antsel_init_cfg(struct antsel_info *asi,
  69                                 wlc_antselcfg_t *antsel,
  70                                 bool auto_sel);
  71
  72 const u16 mimo_2x4_div_antselpat_tbl[] = {
  73         0, 0, 0x9, 0xa,         /* ant0: 0 ant1: 2,3 */
  74         0, 0, 0x5, 0x6,         /* ant0: 1 ant1: 2,3 */
  75         0, 0, 0, 0,             /* n.a.              */
  76         0, 0, 0, 0              /* n.a.              */
  77 };
  78
  79 const u8 mimo_2x4_div_antselid_tbl[16] = {
  80         0, 0, 0, 0, 0, 2, 3, 0,
  81         0, 0, 1, 0, 0, 0, 0, 0  /* pat to antselid */
  82 };
  83
  84 const u16 mimo_2x3_div_antselpat_tbl[] = {
  85         16, 0, 1, 16,           /* ant0: 0 ant1: 1,2 */
  86         16, 16, 16, 16,         /* n.a.              */
  87         16, 2, 16, 16,          /* ant0: 2 ant1: 1   */
  88         16, 16, 16, 16          /* n.a.              */
  89 };
  90
  91 const u8 mimo_2x3_div_antselid_tbl[16] = {
  92         0, 1, 2, 0, 0, 0, 0, 0,
  93         0, 0, 0, 0, 0, 0, 0, 0  /* pat to antselid */
  94 };
  95
  96 struct antsel_info *wlc_antsel_attach(struct wlc_info *wlc,
  97                                       struct osl_info *osh,
  98                                       struct wlc_pub *pub,
  99                                       struct wlc_hw_info *wlc_hw) {
 100         struct antsel_info *asi;
 101
 102         asi = kzalloc(sizeof(struct antsel_info), GFP_ATOMIC);
 103         if (!asi) {
 104                 WL_ERROR("wl%d: wlc_antsel_attach: out of mem\n", pub->unit);
 105                 return NULL;
 106         }
 107
 108         asi->wlc = wlc;
 109         asi->pub = pub;
 110         asi->antsel_type = ANTSEL_NA;
 111         asi->antsel_avail = false;
 112         asi->antsel_antswitch = (u8) getintvar(asi->pub->vars, "antswitch");
 113
 114         if ((asi->pub->sromrev >= 4) && (asi->antsel_antswitch != 0)) {
 115                 switch (asi->antsel_antswitch) {
 116                 case ANTSWITCH_TYPE_1:
 117                 case ANTSWITCH_TYPE_2:
 118                 case ANTSWITCH_TYPE_3:
 119                         /* 4321/2 board with 2x3 switch logic */
 120                         asi->antsel_type = ANTSEL_2x3;
 121                         /* Antenna selection availability */
 122                         if (((u16) getintvar(asi->pub->vars, "aa2g") == 7) ||
 123                             ((u16) getintvar(asi->pub->vars, "aa5g") == 7)) {
 124                                 asi->antsel_avail = true;
 125                         } else
 126                             if (((u16) getintvar(asi->pub->vars, "aa2g") ==
 127                                  3)
 128                                 || ((u16) getintvar(asi->pub->vars, "aa5g")
 129                                     == 3)) {
 130                                 asi->antsel_avail = false;
 131                         } else {
 132                                 asi->antsel_avail = false;
 133                                 WL_ERROR("wlc_antsel_attach: 2o3 board cfg invalid\n");
 134                                 ASSERT(0);
 135                         }
 136                         break;
 137                 default:
 138                         break;
 139                 }
 140         } else if ((asi->pub->sromrev == 4) &&
 141                    ((u16) getintvar(asi->pub->vars, "aa2g") == 7) &&
 142                    ((u16) getintvar(asi->pub->vars, "aa5g") == 0)) {
 143                 /* hack to match old 4321CB2 cards with 2of3 antenna switch */
 144                 asi->antsel_type = ANTSEL_2x3;
 145                 asi->antsel_avail = true;
 146         } else if (asi->pub->boardflags2 & BFL2_2X4_DIV) {
 147                 asi->antsel_type = ANTSEL_2x4;
 148                 asi->antsel_avail = true;
 149         }
 150
 151         /* Set the antenna selection type for the low driver */
 152         wlc_bmac_antsel_type_set(wlc_hw, asi->antsel_type);
 153
 154         /* Init (auto/manual) antenna selection */
 155         wlc_antsel_init_cfg(asi, &asi->antcfg_11n, true);
 156         wlc_antsel_init_cfg(asi, &asi->antcfg_cur, true);
 157
 158         return asi;
 159 }
 160
 161 void wlc_antsel_detach(struct antsel_info *asi)
 162 {
 163         if (!asi)
 164                 return;
 165
 166         kfree(asi);
 167 }
 168
 169 void wlc_antsel_init(struct antsel_info *asi)
 170 {
 171         if ((asi->antsel_type == ANTSEL_2x3) ||
 172             (asi->antsel_type == ANTSEL_2x4))
 173                 wlc_antsel_cfgupd(asi, &asi->antcfg_11n);
 174 }
 175
 176 /* boardlevel antenna selection: init antenna selection structure */
 177 static void
 178 wlc_antsel_init_cfg(struct antsel_info *asi, wlc_antselcfg_t *antsel,
 179                     bool auto_sel)
 180 {
 181         if (asi->antsel_type == ANTSEL_2x3) {
 182                 u8 antcfg_def = ANT_SELCFG_DEF_2x3 |
 183                     ((asi->antsel_avail && auto_sel) ? ANT_SELCFG_AUTO : 0);
 184                 antsel->ant_config[ANT_SELCFG_TX_DEF] = antcfg_def;
 185                 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = antcfg_def;
 186                 antsel->ant_config[ANT_SELCFG_RX_DEF] = antcfg_def;
 187                 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = antcfg_def;
 188                 antsel->num_antcfg = ANT_SELCFG_NUM_2x3;
 189
 190         } else if (asi->antsel_type == ANTSEL_2x4) {
 191
 192                 antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x4;
 193                 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x4;
 194                 antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x4;
 195                 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x4;
 196                 antsel->num_antcfg = ANT_SELCFG_NUM_2x4;
 197
 198         } else {                /* no antenna selection available */
 199
 200                 antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x2;
 201                 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x2;
 202                 antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x2;
 203                 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x2;
 204                 antsel->num_antcfg = 0;
 205         }
 206 }
 207
 208 void BCMFASTPATH
 209 wlc_antsel_antcfg_get(struct antsel_info *asi, bool usedef, bool sel,
 210                       u8 antselid, u8 fbantselid, u8 *antcfg,
 211                       u8 *fbantcfg)
 212 {
 213         u8 ant;
 214
 215         /* if use default, assign it and return */
 216         if (usedef) {
 217                 *antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_DEF];
 218                 *fbantcfg = *antcfg;
 219                 return;
 220         }
 221
 222         if (!sel) {
 223                 *antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
 224                 *fbantcfg = *antcfg;
 225
 226         } else {
 227                 ant = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
 228                 if ((ant & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO) {
 229                         *antcfg = wlc_antsel_id2antcfg(asi, antselid);
 230                         *fbantcfg = wlc_antsel_id2antcfg(asi, fbantselid);
 231                 } else {
 232                         *antcfg =
 233                             asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
 234                         *fbantcfg = *antcfg;
 235                 }
 236         }
 237         return;
 238 }
 239
 240 /* boardlevel antenna selection: convert mimo_antsel (ucode interface) to id */
 241 u8 wlc_antsel_antsel2id(struct antsel_info *asi, u16 antsel)
 242 {
 243         u8 antselid = 0;
 244
 245         if (asi->antsel_type == ANTSEL_2x4) {
 246                 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
 247                 antselid = mimo_2x4_div_antselid_tbl[(antsel & 0xf)];
 248                 return antselid;
 249
 250         } else if (asi->antsel_type == ANTSEL_2x3) {
 251                 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
 252                 antselid = mimo_2x3_div_antselid_tbl[(antsel & 0xf)];
 253                 return antselid;
 254         }
 255
 256         return antselid;
 257 }
 258
 259 /* boardlevel antenna selection: convert id to ant_cfg */
 260 static u8 wlc_antsel_id2antcfg(struct antsel_info *asi, u8 id)
 261 {
 262         u8 antcfg = ANT_SELCFG_DEF_2x2;
 263
 264         if (asi->antsel_type == ANTSEL_2x4) {
 265                 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
 266                 antcfg = (((id & 0x2) << 3) | ((id & 0x1) + 2));
 267                 return antcfg;
 268
 269         } else if (asi->antsel_type == ANTSEL_2x3) {
 270                 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
 271                 antcfg = (((id & 0x02) << 4) | ((id & 0x1) + 1));
 272                 return antcfg;
 273         }
 274
 275         return antcfg;
 276 }
 277
 278 /* boardlevel antenna selection: convert ant_cfg to mimo_antsel (ucode interface) */
 279 static u16 wlc_antsel_antcfg2antsel(struct antsel_info *asi, u8 ant_cfg)
 280 {
 281         u8 idx = WLC_ANTIDX_11N(WLC_ANTSEL_11N(ant_cfg));
 282         u16 mimo_antsel = 0;
 283
 284         if (asi->antsel_type == ANTSEL_2x4) {
 285                 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
 286                 mimo_antsel = (mimo_2x4_div_antselpat_tbl[idx] & 0xf);
 287                 return mimo_antsel;
 288
 289         } else if (asi->antsel_type == ANTSEL_2x3) {
 290                 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
 291                 mimo_antsel = (mimo_2x3_div_antselpat_tbl[idx] & 0xf);
 292                 return mimo_antsel;
 293         }
 294
 295         return mimo_antsel;
 296 }
 297
 298 /* boardlevel antenna selection: ucode interface control */
 299 static int wlc_antsel_cfgupd(struct antsel_info *asi, wlc_antselcfg_t *antsel)
 300 {
 301         struct wlc_info *wlc = asi->wlc;
 302         u8 ant_cfg;
 303         u16 mimo_antsel;
 304
 305         ASSERT(asi->antsel_type != ANTSEL_NA);
 306
 307         /* 1) Update TX antconfig for all frames that are not unicast data
 308          *    (aka default TX)
 309          */
 310         ant_cfg = antsel->ant_config[ANT_SELCFG_TX_DEF];
 311         mimo_antsel = wlc_antsel_antcfg2antsel(asi, ant_cfg);
 312         wlc_write_shm(wlc, M_MIMO_ANTSEL_TXDFLT, mimo_antsel);
 313         /* Update driver stats for currently selected default tx/rx antenna config */
 314         asi->antcfg_cur.ant_config[ANT_SELCFG_TX_DEF] = ant_cfg;
 315
 316         /* 2) Update RX antconfig for all frames that are not unicast data
 317          *    (aka default RX)
 318          */
 319         ant_cfg = antsel->ant_config[ANT_SELCFG_RX_DEF];
 320         mimo_antsel = wlc_antsel_antcfg2antsel(asi, ant_cfg);
 321         wlc_write_shm(wlc, M_MIMO_ANTSEL_RXDFLT, mimo_antsel);
 322         /* Update driver stats for currently selected default tx/rx antenna config */
 323         asi->antcfg_cur.ant_config[ANT_SELCFG_RX_DEF] = ant_cfg;
 324
 325         return 0;
 326 }
 327
 328 #endif                          /* WLANTSEL */