if_rtwn_calib.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 
   39 #include <net/if.h>
   40 #include <net/ethernet.h>
   41 #include <net/if_media.h>
   42 
   43 #include <net80211/ieee80211_var.h>
   44 #include <net80211/ieee80211_radiotap.h>
   45 
   46 #include <dev/rtwn/if_rtwnvar.h>
   47 
   48 #include <dev/rtwn/if_rtwn_calib.h>
   49 #include <dev/rtwn/if_rtwn_debug.h>
   50 #include <dev/rtwn/if_rtwn_task.h>
   51 
   52 static void
   53 rtwn_temp_calib(struct rtwn_softc *sc)
   54 {
   55         uint8_t temp;
   56 
   57         RTWN_ASSERT_LOCKED(sc);
   58 
   59         if (!(sc->sc_flags & RTWN_TEMP_MEASURED)) {
   60                 /* Start measuring temperature. */
   61                 RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
   62                     "%s: start measuring temperature\n", __func__);
   63                 rtwn_temp_measure(sc);
   64                 sc->sc_flags |= RTWN_TEMP_MEASURED;
   65                 return;
   66         }
   67         sc->sc_flags &= ~RTWN_TEMP_MEASURED;
   68 
   69         /* Read measured temperature. */
   70         temp = rtwn_temp_read(sc);
   71         if (temp == 0) {        /* Read failed, skip. */
   72                 RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
   73                     "%s: temperature read failed, skipping\n", __func__);
   74                 return;
   75         }
   76 
   77         RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
   78             "temperature: previous %u, current %u\n",
   79             sc->thcal_temp, temp);
   80 
   81         /*
   82          * Redo LC/IQ calibration if temperature changed significantly since
   83          * last calibration.
   84          */
   85         if (sc->thcal_temp == 0xff) {
   86                 /* efuse value is absent; do LCK at initial status. */
   87                 rtwn_lc_calib(sc);
   88 
   89                 sc->thcal_temp = temp;
   90         } else if (abs(temp - sc->thcal_temp) > sc->temp_delta) {
   91                 RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
   92                     "%s: LC/IQ calib triggered by temp: %u -> %u\n",
   93                     __func__, sc->thcal_temp, temp);
   94 
   95                 rtwn_lc_calib(sc);
   96                 rtwn_iq_calib(sc);
   97 
   98                 /* Record temperature of last calibration. */
   99                 sc->thcal_temp = temp;
  100         }
  101 }
  102 
  103 static void
  104 rtwn_calib_cb(struct rtwn_softc *sc, union sec_param *data)
  105 {
  106         /* Do temperature compensation. */
  107         rtwn_temp_calib(sc);
  108 
  109 #ifndef RTWN_WITHOUT_UCODE
  110         if (sc->sc_ratectl == RTWN_RATECTL_FW) {
  111                 /* Refresh per-node RSSI. */
  112                 rtwn_set_rssi(sc);
  113         }
  114 #endif
  115 
  116         if (sc->vaps_running > sc->monvaps_running)
  117                 callout_reset(&sc->sc_calib_to, 2*hz, rtwn_calib_to, sc);
  118 }
  119 
  120 void
  121 rtwn_calib_to(void *arg)
  122 {
  123         struct rtwn_softc *sc = arg;
  124 
  125         /* Do it in a process context. */
  126         rtwn_cmd_sleepable(sc, NULL, 0, rtwn_calib_cb);
  127 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/rtwn/if_rtwn_calib.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/rtwn/if_rtwn_calib.c