r21a_rx.c

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    1 /*-
    2  * Copyright (c) 2016 Andriy Voskoboinyk <avos@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_rtwnvar.h>
   54 
   55 #include <dev/rtwn/rtl8812a/r12a_rx_desc.h>
   56 
   57 #include <dev/rtwn/rtl8821a/r21a.h>
   58 
   59 int8_t
   60 r21a_get_rssi_cck(struct rtwn_softc *sc, void *physt)
   61 {
   62         struct r12a_rx_phystat *stat = (struct r12a_rx_phystat *)physt;
   63         int8_t lna_idx, rssi;
   64 
   65         lna_idx = (stat->cfosho[0] & 0xe0) >> 5;
   66         rssi = -6 - 2*(stat->cfosho[0] & 0x1f); /* Pout - (2 * VGA_idx) */
   67 
   68         switch (lna_idx) {
   69         case 5:
   70                 rssi -= 32;
   71                 break;
   72         case 4:
   73                 rssi -= 24;
   74                 break;
   75         case 2:
   76                 rssi -= 11;
   77                 break;
   78         case 1:
   79                 rssi += 5;
   80                 break;
   81         case 0:
   82                 rssi += 21;
   83                 break;
   84         }
   85 
   86         return (rssi);
   87 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/rtwn/rtl8821a/r21a_rx.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/rtwn/rtl8821a/r21a_rx.c