r88e_chan.c

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    1 /*      $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
    5  * Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
    6  * Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
    7  *
    8  * Permission to use, copy, modify, and distribute this software for any
    9  * purpose with or without fee is hereby granted, provided that the above
   10  * copyright notice and this permission notice appear in all copies.
   11  *
   12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   19  */
   20 
   21 #include <sys/cdefs.h>
   22 __FBSDID("$FreeBSD$");
   23 
   24 #include "opt_wlan.h"
   25 
   26 #include <sys/param.h>
   27 #include <sys/lock.h>
   28 #include <sys/mutex.h>
   29 #include <sys/mbuf.h>
   30 #include <sys/kernel.h>
   31 #include <sys/socket.h>
   32 #include <sys/systm.h>
   33 #include <sys/malloc.h>
   34 #include <sys/queue.h>
   35 #include <sys/taskqueue.h>
   36 #include <sys/bus.h>
   37 #include <sys/endian.h>
   38 #include <sys/linker.h>
   39 
   40 #include <net/if.h>
   41 #include <net/ethernet.h>
   42 #include <net/if_media.h>
   43 
   44 #include <net80211/ieee80211_var.h>
   45 #include <net80211/ieee80211_radiotap.h>
   46 
   47 #include <dev/rtwn/if_rtwnreg.h>
   48 #include <dev/rtwn/if_rtwnvar.h>
   49 
   50 #include <dev/rtwn/if_rtwn_debug.h>
   51 #include <dev/rtwn/if_rtwn_ridx.h>
   52 
   53 #include <dev/rtwn/rtl8192c/r92c_var.h>
   54 
   55 #include <dev/rtwn/rtl8188e/r88e.h>
   56 #include <dev/rtwn/rtl8188e/r88e_priv.h>
   57 #include <dev/rtwn/rtl8188e/r88e_reg.h>
   58 
   59 static int
   60 r88e_get_power_group(struct rtwn_softc *sc, struct ieee80211_channel *c)
   61 {
   62         uint8_t chan;
   63         int group;
   64 
   65         chan = rtwn_chan2centieee(c);
   66         if (IEEE80211_IS_CHAN_2GHZ(c)) {
   67                 if (chan <= 2)                  group = 0;
   68                 else if (chan <= 5)             group = 1;
   69                 else if (chan <= 8)             group = 2;
   70                 else if (chan <= 11)            group = 3;
   71                 else if (chan <= 13)            group = 4;
   72                 else if (chan <= 14)            group = 5;
   73                 else {
   74                         KASSERT(0, ("wrong 2GHz channel %d!\n", chan));
   75                         return (-1);
   76                 }
   77         } else {
   78                 KASSERT(0, ("wrong channel band (flags %08X)\n", c->ic_flags));
   79                 return (-1);
   80         }
   81 
   82         return (group);
   83 }
   84 
   85 void
   86 r88e_get_txpower(struct rtwn_softc *sc, int chain,
   87     struct ieee80211_channel *c, uint8_t power[RTWN_RIDX_COUNT])
   88 {
   89         struct r92c_softc *rs = sc->sc_priv;
   90         const struct rtwn_r88e_txpwr *rt = rs->rs_txpwr;
   91         uint8_t cckpow, ofdmpow, bw20pow, htpow = 0;
   92         int max_mcs, ridx, group;
   93 
   94         /* Determine channel group. */
   95         group = r88e_get_power_group(sc, c);
   96         if (group == -1) {      /* shouldn't happen */
   97                 device_printf(sc->sc_dev, "%s: incorrect channel\n", __func__);
   98                 return;
   99         }
  100 
  101         /* XXX net80211 regulatory */
  102 
  103         max_mcs = RTWN_RIDX_HT_MCS(sc->ntxchains * 8 - 1);
  104         KASSERT(max_mcs <= RTWN_RIDX_COUNT, ("increase ridx limit\n"));
  105 
  106         /* Compute per-CCK rate Tx power. */
  107         cckpow = rt->cck_tx_pwr[group];
  108         for (ridx = RTWN_RIDX_CCK1; ridx <= RTWN_RIDX_CCK11; ridx++) {
  109                 power[ridx] = (ridx == RTWN_RIDX_CCK2) ? cckpow - 9 : cckpow;
  110         }
  111 
  112         if (group < 5)
  113                 htpow = rt->ht40_tx_pwr[group];
  114 
  115         /* Compute per-OFDM rate Tx power. */
  116         ofdmpow = htpow + rt->ofdm_tx_pwr_diff;
  117         for (ridx = RTWN_RIDX_OFDM6; ridx <= RTWN_RIDX_OFDM54; ridx++)
  118                 power[ridx] = ofdmpow;
  119 
  120         bw20pow = htpow + rt->bw20_tx_pwr_diff;
  121         for (ridx = RTWN_RIDX_HT_MCS(0); ridx <= max_mcs; ridx++)
  122                 power[ridx] = bw20pow;
  123 
  124         /* Apply max limit. */
  125         for (ridx = RTWN_RIDX_CCK1; ridx <= max_mcs; ridx++) {
  126                 if (power[ridx] > R92C_MAX_TX_PWR)
  127                         power[ridx] = R92C_MAX_TX_PWR;
  128         }
  129 }
  130 
  131 void
  132 r88e_set_bw20(struct rtwn_softc *sc, uint8_t chan)
  133 {
  134         struct r92c_softc *rs = sc->sc_priv;
  135 
  136         rtwn_setbits_1(sc, R92C_BWOPMODE, 0, R92C_BWOPMODE_20MHZ);
  137 
  138         rtwn_bb_setbits(sc, R92C_FPGA0_RFMOD, R92C_RFMOD_40MHZ, 0);
  139         rtwn_bb_setbits(sc, R92C_FPGA1_RFMOD, R92C_RFMOD_40MHZ, 0);
  140 
  141         /* Select 20MHz bandwidth. */
  142         rtwn_rf_write(sc, 0, R92C_RF_CHNLBW,
  143             (rs->rf_chnlbw[0] & ~0xfff) | chan | R88E_RF_CHNLBW_BW20);
  144 }
  145 
  146 void
  147 r88e_set_gain(struct rtwn_softc *sc, uint8_t gain)
  148 {
  149 
  150         rtwn_bb_setbits(sc, R92C_OFDM0_AGCCORE1(0),
  151             R92C_OFDM0_AGCCORE1_GAIN_M, gain);
  152 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/rtwn/rtl8188e/r88e_chan.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/rtwn/rtl8188e/r88e_chan.c