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 #include <sys/linker.h>
37
38 #include <net/if.h>
39 #include <net/ethernet.h>
40 #include <net/if_media.h>
41
42 #include <net80211/ieee80211_var.h>
43 #include <net80211/ieee80211_radiotap.h>
44
45 #include <dev/rtwn/if_rtwnreg.h>
46 #include <dev/rtwn/if_rtwnvar.h>
47 #include <dev/rtwn/if_rtwn_ridx.h>
48
49 #include <dev/rtwn/rtl8192c/r92c.h>
50 #include <dev/rtwn/rtl8192c/r92c_rx_desc.h>
51
52 int
r92c_classify_intr(struct rtwn_softc * sc,void * buf,int len)53 r92c_classify_intr(struct rtwn_softc *sc, void *buf, int len)
54 {
55 /* NB: reports are fetched from C2H_MSG register. */
56 return (RTWN_RX_DATA);
57 }
58
59 int8_t
r92c_get_rssi_cck(struct rtwn_softc * sc,void * physt)60 r92c_get_rssi_cck(struct rtwn_softc *sc, void *physt)
61 {
62 static const int8_t cckoff[] = { 16, -12, -26, -46 };
63 struct r92c_rx_cck *cck = (struct r92c_rx_cck *)physt;
64 uint8_t rpt;
65 int8_t rssi;
66
67 if (sc->sc_flags & RTWN_FLAG_CCK_HIPWR) {
68 rpt = (cck->agc_rpt >> 5) & 0x03;
69 rssi = (cck->agc_rpt & 0x1f) << 1;
70 } else {
71 rpt = (cck->agc_rpt >> 6) & 0x03;
72 rssi = cck->agc_rpt & 0x3e;
73 }
74 rssi = cckoff[rpt] - rssi;
75
76 return (rssi);
77 }
78
79 int8_t
r92c_get_rssi_ofdm(struct rtwn_softc * sc,void * physt)80 r92c_get_rssi_ofdm(struct rtwn_softc *sc, void *physt)
81 {
82 struct r92c_rx_phystat *phy = (struct r92c_rx_phystat *)physt;
83 int rssi;
84
85 /* Get average RSSI. */
86 rssi = ((phy->pwdb_all >> 1) & 0x7f) - 110;
87
88 return (rssi);
89 }
90
91 uint8_t
r92c_rx_radiotap_flags(const void * buf)92 r92c_rx_radiotap_flags(const void *buf)
93 {
94 const struct r92c_rx_stat *stat = buf;
95 uint8_t flags, rate;
96
97 if (!(stat->rxdw3 & htole32(R92C_RXDW3_SPLCP)))
98 return (0);
99
100 rate = MS(le32toh(stat->rxdw3), R92C_RXDW3_RATE);
101 if (RTWN_RATE_IS_CCK(rate))
102 flags = IEEE80211_RADIOTAP_F_SHORTPRE;
103 else
104 flags = IEEE80211_RADIOTAP_F_SHORTGI;
105 return (flags);
106 }
107
108 void
r92c_get_rx_stats(struct rtwn_softc * sc,struct ieee80211_rx_stats * rxs,const void * desc,const void * physt_ptr)109 r92c_get_rx_stats(struct rtwn_softc *sc, struct ieee80211_rx_stats *rxs,
110 const void *desc, const void *physt_ptr)
111 {
112 const struct r92c_rx_stat *stat = desc;
113 uint32_t rxdw1, rxdw3;
114 uint8_t rate;
115
116 rxdw1 = le32toh(stat->rxdw1);
117 rxdw3 = le32toh(stat->rxdw3);
118 rate = MS(rxdw3, R92C_RXDW3_RATE);
119
120 if (rxdw1 & R92C_RXDW1_AMPDU)
121 rxs->c_pktflags |= IEEE80211_RX_F_AMPDU;
122 else if (rxdw1 & R92C_RXDW1_AMPDU_MORE)
123 rxs->c_pktflags |= IEEE80211_RX_F_AMPDU_MORE;
124 if ((rxdw3 & R92C_RXDW3_SPLCP) && RTWN_RATE_IS_HT(rate))
125 rxs->c_pktflags |= IEEE80211_RX_F_SHORTGI;
126
127 if (rxdw3 & R92C_RXDW3_HT40)
128 rxs->c_width = IEEE80211_RX_FW_40MHZ;
129 else
130 rxs->c_width = IEEE80211_RX_FW_20MHZ;
131
132 if (RTWN_RATE_IS_CCK(rate))
133 rxs->c_phytype = IEEE80211_RX_FP_11B;
134 else if (RTWN_RATE_IS_OFDM(rate))
135 rxs->c_phytype = IEEE80211_RX_FP_11G;
136 else
137 rxs->c_phytype = IEEE80211_RX_FP_11NG;
138
139 /* Map HW rate index to 802.11 rate. */
140 if (RTWN_RATE_IS_CCK(rate) || RTWN_RATE_IS_OFDM(rate)) {
141 rxs->c_rate = ridx2rate[rate];
142 if (RTWN_RATE_IS_CCK(rate))
143 rxs->c_pktflags |= IEEE80211_RX_F_CCK;
144 else
145 rxs->c_pktflags |= IEEE80211_RX_F_OFDM;
146 } else { /* MCS0~15. */
147 rxs->c_rate =
148 IEEE80211_RATE_MCS | (RTWN_RIDX_TO_MCS(rate));
149 rxs->c_pktflags |= IEEE80211_RX_F_HT;
150 }
151 }
152