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/* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */
/*-
* Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
* Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
* Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_wlan.h"
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <net/if_media.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <dev/rtwn/if_rtwnvar.h>
#include <dev/rtwn/if_rtwn_calib.h>
#include <dev/rtwn/if_rtwn_debug.h>
#include <dev/rtwn/if_rtwn_task.h>
static void
rtwn_temp_calib(struct rtwn_softc *sc)
{
uint8_t temp;
RTWN_ASSERT_LOCKED(sc);
if (!(sc->sc_flags & RTWN_TEMP_MEASURED)) {
/* Start measuring temperature. */
RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
"%s: start measuring temperature\n", __func__);
rtwn_temp_measure(sc);
sc->sc_flags |= RTWN_TEMP_MEASURED;
return;
}
sc->sc_flags &= ~RTWN_TEMP_MEASURED;
/* Read measured temperature. */
temp = rtwn_temp_read(sc);
if (temp == 0) { /* Read failed, skip. */
RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
"%s: temperature read failed, skipping\n", __func__);
return;
}
RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
"temperature: previous %u, current %u\n",
sc->thcal_temp, temp);
/*
* Redo LC/IQ calibration if temperature changed significantly since
* last calibration.
*/
if (sc->thcal_temp == 0xff) {
/* efuse value is absent; do LCK at initial status. */
rtwn_lc_calib(sc);
sc->thcal_temp = temp;
} else if (abs(temp - sc->thcal_temp) > sc->temp_delta) {
RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
"%s: LC/IQ calib triggered by temp: %u -> %u\n",
__func__, sc->thcal_temp, temp);
rtwn_lc_calib(sc);
rtwn_iq_calib(sc);
/* Record temperature of last calibration. */
sc->thcal_temp = temp;
}
}
static void
rtwn_calib_cb(struct rtwn_softc *sc, union sec_param *data)
{
/* Do temperature compensation. */
rtwn_temp_calib(sc);
#ifndef RTWN_WITHOUT_UCODE
if (sc->sc_ratectl == RTWN_RATECTL_FW) {
/* Refresh per-node RSSI. */
rtwn_set_rssi(sc);
}
#endif
if (sc->vaps_running > sc->monvaps_running)
callout_reset(&sc->sc_calib_to, 2*hz, rtwn_calib_to, sc);
}
void
rtwn_calib_to(void *arg)
{
struct rtwn_softc *sc = arg;
/* Do it in a process context. */
rtwn_cmd_sleepable(sc, NULL, 0, rtwn_calib_cb);
}
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