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 struct r92c_softc *rs = sc->sc_priv;
88 const struct rtwn_r88e_txpwr *rt = rs->rs_txpwr;
89 uint8_t cckpow, ofdmpow, bw20pow, htpow = 0;
90 int max_mcs, ridx, group;
91
92 /* Determine channel group. */
93 group = r88e_get_power_group(sc, c);
94 if (group == -1) { /* shouldn't happen */
95 device_printf(sc->sc_dev, "%s: incorrect channel\n", __func__);
96 return;
97 }
98
99 /* XXX net80211 regulatory */
100
101 max_mcs = RTWN_RIDX_HT_MCS(sc->ntxchains * 8 - 1);
102 KASSERT(max_mcs <= RTWN_RIDX_COUNT, ("increase ridx limit\n"));
103
104 /* Compute per-CCK rate Tx power. */
105 cckpow = rt->cck_tx_pwr[group];
106 for (ridx = RTWN_RIDX_CCK1; ridx <= RTWN_RIDX_CCK11; ridx++) {
107 power[ridx] = (ridx == RTWN_RIDX_CCK2) ? cckpow - 9 : cckpow;
108 }
109
110 if (group < 5)
111 htpow = rt->ht40_tx_pwr[group];
112
113 /* Compute per-OFDM rate Tx power. */
114 ofdmpow = htpow + rt->ofdm_tx_pwr_diff;
115 for (ridx = RTWN_RIDX_OFDM6; ridx <= RTWN_RIDX_OFDM54; ridx++)
116 power[ridx] = ofdmpow;
117
118 bw20pow = htpow + rt->bw20_tx_pwr_diff;
119 for (ridx = RTWN_RIDX_HT_MCS(0); ridx <= max_mcs; ridx++)
120 power[ridx] = bw20pow;
121
122 /* Apply max limit. */
123 for (ridx = RTWN_RIDX_CCK1; ridx <= max_mcs; ridx++) {
124 if (power[ridx] > R92C_MAX_TX_PWR)
125 power[ridx] = R92C_MAX_TX_PWR;
126 }
127 }
128
129 void
r88e_set_bw20(struct rtwn_softc * sc,uint8_t chan)130 r88e_set_bw20(struct rtwn_softc *sc, uint8_t chan)
131 {
132 struct r92c_softc *rs = sc->sc_priv;
133
134 rtwn_setbits_1(sc, R92C_BWOPMODE, 0, R92C_BWOPMODE_20MHZ);
135
136 rtwn_bb_setbits(sc, R92C_FPGA0_RFMOD, R92C_RFMOD_40MHZ, 0);
137 rtwn_bb_setbits(sc, R92C_FPGA1_RFMOD, R92C_RFMOD_40MHZ, 0);
138
139 /* Select 20MHz bandwidth. */
140 rtwn_rf_write(sc, 0, R92C_RF_CHNLBW,
141 (rs->rf_chnlbw[0] & ~0xfff) | chan | R88E_RF_CHNLBW_BW20);
142 }
143
144 void
r88e_set_gain(struct rtwn_softc * sc,uint8_t gain)145 r88e_set_gain(struct rtwn_softc *sc, uint8_t gain)
146 {
147
148 rtwn_bb_setbits(sc, R92C_OFDM0_AGCCORE1(0),
149 R92C_OFDM0_AGCCORE1_GAIN_M, gain);
150 }
151