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#include <sys/linker.h>
39
40#include <net/if.h>
41#include <net/ethernet.h>
42#include <net/if_media.h>
43
44#include <net80211/ieee80211_var.h>
45#include <net80211/ieee80211_radiotap.h>
46
47#include <dev/rtwn/if_rtwnreg.h>
48#include <dev/rtwn/if_rtwnvar.h>
49#include <dev/rtwn/if_rtwn_ridx.h>
50
51#include <dev/rtwn/rtl8192c/r92c.h>
52#include <dev/rtwn/rtl8192c/r92c_rx_desc.h>
53
54int
55r92c_classify_intr(struct rtwn_softc *sc, void *buf, int len)
56{
57	/* NB: reports are fetched from C2H_MSG register. */
58	return (RTWN_RX_DATA);
59}
60
61int8_t
62r92c_get_rssi_cck(struct rtwn_softc *sc, void *physt)
63{
64	static const int8_t cckoff[] = { 16, -12, -26, -46 };
65	struct r92c_rx_cck *cck = (struct r92c_rx_cck *)physt;
66	uint8_t rpt;
67	int8_t rssi;
68
69	if (sc->sc_flags & RTWN_FLAG_CCK_HIPWR) {
70		rpt = (cck->agc_rpt >> 5) & 0x03;
71		rssi = (cck->agc_rpt & 0x1f) << 1;
72	} else {
73		rpt = (cck->agc_rpt >> 6) & 0x03;
74		rssi = cck->agc_rpt & 0x3e;
75	}
76	rssi = cckoff[rpt] - rssi;
77
78	return (rssi);
79}
80
81int8_t
82r92c_get_rssi_ofdm(struct rtwn_softc *sc, void *physt)
83{
84	struct r92c_rx_phystat *phy = (struct r92c_rx_phystat *)physt;
85	int rssi;
86
87	/* Get average RSSI. */
88	rssi = ((phy->pwdb_all >> 1) & 0x7f) - 110;
89
90	return (rssi);
91}
92
93uint8_t
94r92c_rx_radiotap_flags(const void *buf)
95{
96	const struct r92c_rx_stat *stat = buf;
97	uint8_t flags, rate;
98
99	if (!(stat->rxdw3 & htole32(R92C_RXDW3_SPLCP)))
100		return (0);
101
102	rate = MS(le32toh(stat->rxdw3), R92C_RXDW3_RATE);
103	if (RTWN_RATE_IS_CCK(rate))
104		flags = IEEE80211_RADIOTAP_F_SHORTPRE;
105	else
106		flags = IEEE80211_RADIOTAP_F_SHORTGI;
107	return (flags);
108}
109
110void
111r92c_get_rx_stats(struct rtwn_softc *sc, struct ieee80211_rx_stats *rxs,
112    const void *desc, const void *physt_ptr)
113{
114	const struct r92c_rx_stat *stat = desc;
115	uint32_t rxdw1, rxdw3;
116	uint8_t rate;
117
118	rxdw1 = le32toh(stat->rxdw1);
119	rxdw3 = le32toh(stat->rxdw3);
120	rate = MS(rxdw3, R92C_RXDW3_RATE);
121
122	if (rxdw1 & R92C_RXDW1_AMPDU)
123		rxs->c_pktflags |= IEEE80211_RX_F_AMPDU;
124	else if (rxdw1 & R92C_RXDW1_AMPDU_MORE)
125		rxs->c_pktflags |= IEEE80211_RX_F_AMPDU_MORE;
126	if ((rxdw3 & R92C_RXDW3_SPLCP) && rate >= RTWN_RIDX_HT_MCS(0))
127		rxs->c_pktflags |= IEEE80211_RX_F_SHORTGI;
128
129	if (rxdw3 & R92C_RXDW3_HT40)
130		rxs->c_width = IEEE80211_RX_FW_40MHZ;
131	else
132		rxs->c_width = IEEE80211_RX_FW_20MHZ;
133
134	if (RTWN_RATE_IS_CCK(rate))
135		rxs->c_phytype = IEEE80211_RX_FP_11B;
136	else if (rate < RTWN_RIDX_HT_MCS(0))
137		rxs->c_phytype = IEEE80211_RX_FP_11G;
138	else
139		rxs->c_phytype = IEEE80211_RX_FP_11NG;
140
141	/* Map HW rate index to 802.11 rate. */
142	if (rate < RTWN_RIDX_HT_MCS(0)) {
143		rxs->c_rate = ridx2rate[rate];
144		if (RTWN_RATE_IS_CCK(rate))
145			rxs->c_pktflags |= IEEE80211_RX_F_CCK;
146		else
147			rxs->c_pktflags |= IEEE80211_RX_F_OFDM;
148	} else {	/* MCS0~15. */
149		rxs->c_rate =
150		    IEEE80211_RATE_MCS | (rate - RTWN_RIDX_HT_MCS_SHIFT);
151		rxs->c_pktflags |= IEEE80211_RX_F_HT;
152	}
153}
154