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 } 128