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
52static void
53rtwn_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
103static void
104rtwn_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
120void
121rtwn_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}
128