r92e_chan.c

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    1 /*-
    2  * Copyright (c) 2017 Kevin Lo <kevlo@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include "opt_wlan.h"
   31 
   32 #include <sys/param.h>
   33 #include <sys/lock.h>
   34 #include <sys/mutex.h>
   35 #include <sys/mbuf.h>
   36 #include <sys/kernel.h>
   37 #include <sys/socket.h>
   38 #include <sys/systm.h>
   39 #include <sys/malloc.h>
   40 #include <sys/queue.h>
   41 #include <sys/taskqueue.h>
   42 #include <sys/bus.h>
   43 #include <sys/endian.h>
   44 #include <sys/linker.h>
   45 
   46 #include <net/if.h>
   47 #include <net/ethernet.h>
   48 #include <net/if_media.h>
   49 
   50 #include <net80211/ieee80211_var.h>
   51 #include <net80211/ieee80211_radiotap.h>
   52 
   53 #include <dev/rtwn/if_rtwnreg.h>
   54 #include <dev/rtwn/if_rtwnvar.h>
   55 
   56 #include <dev/rtwn/if_rtwn_debug.h>
   57 #include <dev/rtwn/if_rtwn_ridx.h>
   58 #include <dev/rtwn/if_rtwn_rx.h>
   59 
   60 #include <dev/rtwn/rtl8192c/r92c.h>
   61 
   62 #include <dev/rtwn/rtl8192e/r92e.h>
   63 #include <dev/rtwn/rtl8192e/r92e_reg.h>
   64 #include <dev/rtwn/rtl8192e/r92e_var.h>
   65 
   66 static int
   67 r92e_get_power_group(struct rtwn_softc *sc, struct ieee80211_channel *c)
   68 {
   69         uint8_t chan;
   70         int group;
   71 
   72         chan = rtwn_chan2centieee(c);
   73         if (IEEE80211_IS_CHAN_2GHZ(c)) {
   74                 if (chan <= 2)                  group = 0;
   75                 else if (chan <= 5)             group = 1;
   76                 else if (chan <= 8)             group = 2;
   77                 else if (chan <= 11)            group = 3;
   78                 else if (chan <= 14)            group = 4;
   79                 else {
   80                         KASSERT(0, ("wrong 2GHz channel %d!\n", chan));
   81                         return (-1);
   82                 }
   83         } else {
   84                 KASSERT(0, ("wrong channel band (flags %08X)\n", c->ic_flags));
   85                 return (-1);
   86         }
   87 
   88         return (group);
   89 }
   90 
   91 static void
   92 r92e_get_txpower(struct rtwn_softc *sc, int chain, struct ieee80211_channel *c,
   93     uint8_t power[RTWN_RIDX_COUNT])
   94 {
   95         struct r92e_softc *rs = sc->sc_priv;
   96         int i, ridx, group, max_mcs;
   97 
   98         /* Determine channel group. */
   99         group = r92e_get_power_group(sc, c);
  100         if (group == -1) {      /* shouldn't happen */
  101                 device_printf(sc->sc_dev, "%s: incorrect channel\n", __func__);
  102                 return;
  103         }
  104 
  105         max_mcs = RTWN_RIDX_HT_MCS(sc->ntxchains * 8 - 1);
  106 
  107         /* XXX regulatory */
  108         /* XXX net80211 regulatory */
  109 
  110         for (ridx = RTWN_RIDX_CCK1; ridx <= RTWN_RIDX_CCK11; ridx++)
  111                 power[ridx] = rs->cck_tx_pwr[chain][group];
  112         for (ridx = RTWN_RIDX_OFDM6; ridx <= max_mcs; ridx++)
  113                 power[ridx] = rs->ht40_tx_pwr_2g[chain][group];
  114 
  115         for (ridx = RTWN_RIDX_OFDM6; ridx <= RTWN_RIDX_OFDM54; ridx++)
  116                 power[ridx] += rs->ofdm_tx_pwr_diff_2g[chain][0];
  117 
  118         for (i = 0; i < sc->ntxchains; i++) {
  119                 uint8_t min_mcs;
  120                 uint8_t pwr_diff;
  121 
  122                 if (IEEE80211_IS_CHAN_HT40(c))
  123                         pwr_diff = rs->bw40_tx_pwr_diff_2g[chain][i];
  124                 else
  125                         pwr_diff = rs->bw20_tx_pwr_diff_2g[chain][i];
  126 
  127                 min_mcs = RTWN_RIDX_HT_MCS(i * 8);
  128                 for (ridx = min_mcs; ridx <= max_mcs; ridx++)
  129                         power[ridx] += pwr_diff;
  130         }
  131 
  132         /* Apply max limit. */
  133         for (ridx = RTWN_RIDX_CCK1; ridx <= max_mcs; ridx++) {
  134                 if (power[ridx] > R92C_MAX_TX_PWR)
  135                         power[ridx] = R92C_MAX_TX_PWR;
  136         }
  137 
  138 #ifdef RTWN_DEBUG
  139         if (sc->sc_debug & RTWN_DEBUG_TXPWR) {
  140                 /* Dump per-rate Tx power values. */
  141                 printf("Tx power for chain %d:\n", chain);
  142                 for (ridx = RTWN_RIDX_CCK1; ridx < RTWN_RIDX_COUNT; ridx++)
  143                         printf("Rate %d = %u\n", ridx, power[ridx]);
  144         }
  145 #endif
  146 }
  147 
  148 static void
  149 r92e_set_txpower(struct rtwn_softc *sc, struct ieee80211_channel *c)
  150 {
  151         uint8_t power[RTWN_RIDX_COUNT];
  152         int i;
  153 
  154         for (i = 0; i < sc->ntxchains; i++) {
  155                 memset(power, 0, sizeof(power));
  156                 /* Compute per-rate Tx power values. */
  157                 r92e_get_txpower(sc, i, c, power);
  158                 /* Write per-rate Tx power values to hardware. */
  159                 r92c_write_txpower(sc, i, power);
  160         }
  161 }
  162 
  163 static void
  164 r92e_set_bw40(struct rtwn_softc *sc, uint8_t chan, int prichlo)
  165 {
  166         int i;
  167 
  168         rtwn_setbits_2(sc, R92C_WMAC_TRXPTCL_CTL, 0x100, 0x80);
  169         rtwn_write_1(sc, R12A_DATA_SEC,
  170             prichlo ? R12A_DATA_SEC_PRIM_DOWN_20 : R12A_DATA_SEC_PRIM_UP_20);
  171 
  172         rtwn_bb_setbits(sc, R92C_FPGA0_RFMOD, 0, R92C_RFMOD_40MHZ);
  173         rtwn_bb_setbits(sc, R92C_FPGA1_RFMOD, 0, R92C_RFMOD_40MHZ);
  174 
  175         /* Select 40MHz bandwidth. */
  176         for (i = 0; i < sc->nrxchains; i++)
  177                 rtwn_rf_setbits(sc, i, R92C_RF_CHNLBW,
  178                     R88E_RF_CHNLBW_BW20, 0x400);
  179 
  180         /* Set CCK side band. */
  181         rtwn_bb_setbits(sc, R92C_CCK0_SYSTEM,
  182             R92C_CCK0_SYSTEM_CCK_SIDEBAND, (prichlo ? 0 : 1) << 4);
  183                 
  184         rtwn_bb_setbits(sc, R92C_OFDM1_LSTF, 0x0c00, (prichlo ? 1 : 2) << 10);
  185 
  186         rtwn_bb_setbits(sc, R92C_FPGA0_ANAPARAM2,
  187             R92C_FPGA0_ANAPARAM2_CBW20, 0);
  188 
  189         rtwn_bb_setbits(sc, 0x818, 0x0c000000, (prichlo ? 2 : 1) << 26);
  190 }
  191 
  192 static void
  193 r92e_set_bw20(struct rtwn_softc *sc, uint8_t chan)
  194 {
  195         int i;
  196 
  197         rtwn_setbits_2(sc, R92C_WMAC_TRXPTCL_CTL, 0x180, 0);
  198         rtwn_write_1(sc, R12A_DATA_SEC, R12A_DATA_SEC_NO_EXT);
  199 
  200         rtwn_bb_setbits(sc, R92C_FPGA0_RFMOD, R92C_RFMOD_40MHZ, 0);
  201         rtwn_bb_setbits(sc, R92C_FPGA1_RFMOD, R92C_RFMOD_40MHZ, 0);
  202 
  203         /* Select 20MHz bandwidth. */
  204         for (i = 0; i < sc->nrxchains; i++)
  205                 rtwn_rf_setbits(sc, i, R92C_RF_CHNLBW,
  206                     R88E_RF_CHNLBW_BW20, 0xc00);
  207 
  208         rtwn_bb_setbits(sc, R92C_OFDM0_TXPSEUDONOISEWGT, 0xc0000000, 0);
  209 }
  210 
  211 void
  212 r92e_set_chan(struct rtwn_softc *sc, struct ieee80211_channel *c)
  213 {
  214         struct r92e_softc *rs = sc->sc_priv;
  215         u_int chan;
  216         int i;
  217 
  218         chan = rtwn_chan2centieee(c);
  219 
  220         for (i = 0; i < sc->nrxchains; i++) {
  221                 rtwn_rf_write(sc, i, R92C_RF_CHNLBW,
  222                     RW(rs->rf_chnlbw[0], R92C_RF_CHNLBW_CHNL, chan));
  223         }
  224 
  225         if (IEEE80211_IS_CHAN_HT40(c))
  226                 r92e_set_bw40(sc, chan, IEEE80211_IS_CHAN_HT40U(c));
  227         else
  228                 r92e_set_bw20(sc, chan);
  229 
  230         /* Set Tx power for this new channel. */
  231         r92e_set_txpower(sc, c);
  232 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/rtwn/rtl8192e/r92e_chan.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/rtwn/rtl8192e/r92e_chan.c