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
48 #include <dev/rtwn/if_rtwn_debug.h>
49 #include <dev/rtwn/if_rtwn_ridx.h>
50
51 #include <dev/rtwn/rtl8192c/r92c_var.h>
52
53 #include <dev/rtwn/rtl8188e/r88e.h>
54 #include <dev/rtwn/rtl8188e/r88e_priv.h>
55 #include <dev/rtwn/rtl8188e/r88e_reg.h>
56
57 static int
r88e_get_power_group(struct rtwn_softc * sc,struct ieee80211_channel * c)58 r88e_get_power_group(struct rtwn_softc *sc, struct ieee80211_channel *c)
59 {
60 uint8_t chan;
61 int group;
62
63 chan = rtwn_chan2centieee(c);
64 if (IEEE80211_IS_CHAN_2GHZ(c)) {
65 if (chan <= 2) group = 0;
66 else if (chan <= 5) group = 1;
67 else if (chan <= 8) group = 2;
68 else if (chan <= 11) group = 3;
69 else if (chan <= 13) group = 4;
70 else if (chan <= 14) group = 5;
71 else {
72 KASSERT(0, ("wrong 2GHz channel %d!\n", chan));
73 return (-1);
74 }
75 } else {
76 KASSERT(0, ("wrong channel band (flags %08X)\n", c->ic_flags));
77 return (-1);
78 }
79
80 return (group);
81 }
82
83 void
r88e_get_txpower(struct rtwn_softc * sc,int chain,struct ieee80211_channel * c,uint8_t power[RTWN_RIDX_COUNT])84 r88e_get_txpower(struct rtwn_softc *sc, int chain,
85 struct ieee80211_channel *c, uint8_t power[RTWN_RIDX_COUNT])
86 {
87 const struct ieee80211com *ic = &sc->sc_ic;
88 struct r92c_softc *rs = sc->sc_priv;
89 const struct rtwn_r88e_txpwr *rt = rs->rs_txpwr;
90 uint8_t cckpow, ofdmpow, bw20pow, htpow = 0;
91 int max_mcs, ridx, group;
92
93 /* Determine channel group. */
94 group = r88e_get_power_group(sc, c);
95 if (group == -1) { /* shouldn't happen */
96 device_printf(sc->sc_dev, "%s: incorrect channel\n", __func__);
97 return;
98 }
99
100 /*
101 * Treat the entries in 1/2 dBm resolution where 0 = 0dBm.
102 * Apply the adjustments afterwards; assume that the vendor
103 * driver is applying offsets to make up for the actual
104 * target power in dBm.
105 */
106
107 max_mcs = RTWN_RIDX_HT_MCS(sc->ntxchains * 8 - 1);
108 KASSERT(max_mcs <= RTWN_RIDX_LEGACY_HT_COUNT, ("increase ridx limit\n"));
109
110 /* Compute per-CCK rate Tx power. */
111 for (ridx = RTWN_RIDX_CCK1; ridx <= RTWN_RIDX_CCK11; ridx++) {
112 /*
113 * Note: the regulatory limit is applied to cckpow before
114 * it's subtracted for CCK2.
115 */
116 cckpow = rt->cck_tx_pwr[group];
117 if (cckpow > ic->ic_txpowlimit)
118 cckpow = ic->ic_txpowlimit;
119
120 /*
121 * If it's CCK2 then we subtract the 9 (4.5dB?) offset
122 * and make sure we aren't going to underflow.
123 */
124 if (ridx == RTWN_RIDX_CCK2 && cckpow < 9)
125 cckpow = 0;
126 else if (ridx == RTWN_RIDX_CCK2)
127 cckpow = cckpow - 9;
128
129 power[ridx] = cckpow;
130 }
131
132 if (group < 5)
133 htpow = rt->ht40_tx_pwr[group];
134
135 /* Compute per-OFDM rate Tx power. */
136 ofdmpow = htpow + rt->ofdm_tx_pwr_diff;
137 if (ofdmpow > ic->ic_txpowlimit)
138 ofdmpow = ic->ic_txpowlimit;
139 for (ridx = RTWN_RIDX_OFDM6; ridx <= RTWN_RIDX_OFDM54; ridx++)
140 power[ridx] = ofdmpow;
141
142 bw20pow = htpow + rt->bw20_tx_pwr_diff;
143 if (bw20pow > ic->ic_txpowlimit)
144 bw20pow = ic->ic_txpowlimit;
145 for (ridx = RTWN_RIDX_HT_MCS(0); ridx <= max_mcs; ridx++)
146 power[ridx] = bw20pow;
147
148 /* Apply max limit */
149 for (ridx = RTWN_RIDX_CCK1; ridx <= max_mcs; ridx++) {
150 if (power[ridx] > R92C_MAX_TX_PWR)
151 power[ridx] = R92C_MAX_TX_PWR;
152 }
153 }
154
155 void
r88e_set_bw20(struct rtwn_softc * sc,uint8_t chan)156 r88e_set_bw20(struct rtwn_softc *sc, uint8_t chan)
157 {
158 struct r92c_softc *rs = sc->sc_priv;
159
160 rtwn_setbits_1(sc, R92C_BWOPMODE, 0, R92C_BWOPMODE_20MHZ);
161
162 rtwn_bb_setbits(sc, R92C_FPGA0_RFMOD, R92C_RFMOD_40MHZ, 0);
163 rtwn_bb_setbits(sc, R92C_FPGA1_RFMOD, R92C_RFMOD_40MHZ, 0);
164
165 /* Select 20MHz bandwidth. */
166 rtwn_rf_write(sc, 0, R92C_RF_CHNLBW,
167 (rs->rf_chnlbw[0] & ~0xfff) | chan | R88E_RF_CHNLBW_BW20);
168 }
169
170 void
r88e_set_gain(struct rtwn_softc * sc,uint8_t gain)171 r88e_set_gain(struct rtwn_softc *sc, uint8_t gain)
172 {
173
174 rtwn_bb_setbits(sc, R92C_OFDM0_AGCCORE1(0),
175 R92C_OFDM0_AGCCORE1_GAIN_M, gain);
176 }
177