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 #include "opt_wlan.h"
23
24 #include <sys/param.h>
25 #include <sys/lock.h>
26 #include <sys/mutex.h>
27 #include <sys/mbuf.h>
28 #include <sys/kernel.h>
29 #include <sys/socket.h>
30 #include <sys/systm.h>
31 #include <sys/malloc.h>
32 #include <sys/queue.h>
33 #include <sys/taskqueue.h>
34 #include <sys/bus.h>
35 #include <sys/endian.h>
36
37 #include <net/if.h>
38 #include <net/ethernet.h>
39 #include <net/if_media.h>
40
41 #include <net80211/ieee80211_var.h>
42 #include <net80211/ieee80211_radiotap.h>
43
44 #include <dev/rtwn/if_rtwnvar.h>
45
46 #include <dev/rtwn/if_rtwn_calib.h>
47 #include <dev/rtwn/if_rtwn_debug.h>
48 #include <dev/rtwn/if_rtwn_task.h>
49
50 static void
rtwn_temp_calib(struct rtwn_softc * sc)51 rtwn_temp_calib(struct rtwn_softc *sc)
52 {
53 uint8_t temp;
54
55 RTWN_ASSERT_LOCKED(sc);
56
57 if (!(sc->sc_flags & RTWN_TEMP_MEASURED)) {
58 /* Start measuring temperature. */
59 RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
60 "%s: start measuring temperature\n", __func__);
61 rtwn_temp_measure(sc);
62 sc->sc_flags |= RTWN_TEMP_MEASURED;
63 return;
64 }
65 sc->sc_flags &= ~RTWN_TEMP_MEASURED;
66
67 /* Read measured temperature. */
68 temp = rtwn_temp_read(sc);
69 if (temp == 0) { /* Read failed, skip. */
70 RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
71 "%s: temperature read failed, skipping\n", __func__);
72 return;
73 }
74
75 RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
76 "temperature: previous %u, current %u\n",
77 sc->thcal_temp, temp);
78
79 /*
80 * Redo LC/IQ calibration if temperature changed significantly since
81 * last calibration.
82 */
83 if (sc->thcal_temp == 0xff) {
84 /* efuse value is absent; do LCK at initial status. */
85 rtwn_lc_calib(sc);
86
87 sc->thcal_temp = temp;
88 } else if (abs(temp - sc->thcal_temp) > sc->temp_delta) {
89 RTWN_DPRINTF(sc, RTWN_DEBUG_TEMP,
90 "%s: LC/IQ calib triggered by temp: %u -> %u\n",
91 __func__, sc->thcal_temp, temp);
92
93 rtwn_lc_calib(sc);
94 rtwn_iq_calib(sc);
95
96 /* Record temperature of last calibration. */
97 sc->thcal_temp = temp;
98 }
99 }
100
101 static void
rtwn_calib_cb(struct rtwn_softc * sc,union sec_param * data)102 rtwn_calib_cb(struct rtwn_softc *sc, union sec_param *data)
103 {
104 /* Do temperature compensation. */
105 rtwn_temp_calib(sc);
106
107 #ifndef RTWN_WITHOUT_UCODE
108 if (sc->sc_ratectl == RTWN_RATECTL_FW) {
109 /* Refresh per-node RSSI. */
110 rtwn_set_rssi(sc);
111 }
112 #endif
113
114 if (sc->vaps_running > sc->monvaps_running)
115 callout_reset(&sc->sc_calib_to, 2*hz, rtwn_calib_to, sc);
116 }
117
118 void
rtwn_calib_to(void * arg)119 rtwn_calib_to(void *arg)
120 {
121 struct rtwn_softc *sc = arg;
122
123 /* Do it in a process context. */
124 rtwn_cmd_sleepable(sc, NULL, 0, rtwn_calib_cb);
125 }
126