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) 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 50 #include <dev/rtwn/if_rtwn_debug.h> 51 #include <dev/rtwn/if_rtwn_ridx.h> 52 53 #include <dev/rtwn/rtl8192c/r92c.h> 54 #include <dev/rtwn/rtl8192c/r92c_priv.h> 55 #include <dev/rtwn/rtl8192c/r92c_reg.h> 56 #include <dev/rtwn/rtl8192c/r92c_var.h> 57 58 static int 59 r92c_get_power_group(struct rtwn_softc *sc, struct ieee80211_channel *c) 60 { 61 uint8_t chan; 62 int group; 63 64 chan = rtwn_chan2centieee(c); 65 if (IEEE80211_IS_CHAN_2GHZ(c)) { 66 if (chan <= 3) group = 0; 67 else if (chan <= 9) group = 1; 68 else if (chan <= 14) group = 2; 69 else { 70 KASSERT(0, ("wrong 2GHz channel %d!\n", chan)); 71 return (-1); 72 } 73 } else { 74 KASSERT(0, ("wrong channel band (flags %08X)\n", c->ic_flags)); 75 return (-1); 76 } 77 78 return (group); 79 } 80 81 /* XXX recheck */ 82 void 83 r92c_get_txpower(struct rtwn_softc *sc, int chain, 84 struct ieee80211_channel *c, uint8_t power[RTWN_RIDX_COUNT]) 85 { 86 struct r92c_softc *rs = sc->sc_priv; 87 struct rtwn_r92c_txpwr *rt = rs->rs_txpwr; 88 const struct rtwn_r92c_txagc *base = rs->rs_txagc; 89 uint8_t ofdmpow, htpow, diff, max; 90 int max_mcs, ridx, group; 91 92 /* Determine channel group. */ 93 group = r92c_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 if (rs->regulatory == 0) { 105 for (ridx = RTWN_RIDX_CCK1; ridx <= RTWN_RIDX_CCK11; ridx++) 106 power[ridx] = base[chain].pwr[0][ridx]; 107 } 108 for (ridx = RTWN_RIDX_OFDM6; ridx < RTWN_RIDX_COUNT; ridx++) { 109 if (rs->regulatory == 3) { 110 power[ridx] = base[chain].pwr[0][ridx]; 111 /* Apply vendor limits. */ 112 if (IEEE80211_IS_CHAN_HT40(c)) 113 max = rt->ht40_max_pwr[chain][group]; 114 else 115 max = rt->ht20_max_pwr[chain][group]; 116 if (power[ridx] > max) 117 power[ridx] = max; 118 } else if (rs->regulatory == 1) { 119 if (!IEEE80211_IS_CHAN_HT40(c)) 120 power[ridx] = base[chain].pwr[group][ridx]; 121 } else if (rs->regulatory != 2) 122 power[ridx] = base[chain].pwr[0][ridx]; 123 } 124 125 /* Compute per-CCK rate Tx power. */ 126 for (ridx = RTWN_RIDX_CCK1; ridx <= RTWN_RIDX_CCK11; ridx++) 127 power[ridx] += rt->cck_tx_pwr[chain][group]; 128 129 htpow = rt->ht40_1s_tx_pwr[chain][group]; 130 if (sc->ntxchains > 1) { 131 /* Apply reduction for 2 spatial streams. */ 132 diff = rt->ht40_2s_tx_pwr_diff[chain][group]; 133 htpow = (htpow > diff) ? htpow - diff : 0; 134 } 135 136 /* Compute per-OFDM rate Tx power. */ 137 diff = rt->ofdm_tx_pwr_diff[chain][group]; 138 ofdmpow = htpow + diff; /* HT->OFDM correction. */ 139 for (ridx = RTWN_RIDX_OFDM6; ridx <= RTWN_RIDX_OFDM54; ridx++) 140 power[ridx] += ofdmpow; 141 142 /* Compute per-MCS Tx power. */ 143 if (!IEEE80211_IS_CHAN_HT40(c)) { 144 diff = rt->ht20_tx_pwr_diff[chain][group]; 145 htpow += diff; /* HT40->HT20 correction. */ 146 } 147 for (ridx = RTWN_RIDX_HT_MCS(0); ridx <= max_mcs; ridx++) 148 power[ridx] += htpow; 149 150 /* Apply max limit. */ 151 for (ridx = RTWN_RIDX_CCK1; ridx <= max_mcs; ridx++) { 152 if (power[ridx] > R92C_MAX_TX_PWR) 153 power[ridx] = R92C_MAX_TX_PWR; 154 } 155 } 156 157 void 158 r92c_write_txpower(struct rtwn_softc *sc, int chain, 159 uint8_t power[RTWN_RIDX_COUNT]) 160 { 161 uint32_t reg; 162 163 /* Write per-CCK rate Tx power. */ 164 if (chain == 0) { 165 reg = rtwn_bb_read(sc, R92C_TXAGC_A_CCK1_MCS32); 166 reg = RW(reg, R92C_TXAGC_A_CCK1, power[RTWN_RIDX_CCK1]); 167 rtwn_bb_write(sc, R92C_TXAGC_A_CCK1_MCS32, reg); 168 reg = rtwn_bb_read(sc, R92C_TXAGC_B_CCK11_A_CCK2_11); 169 reg = RW(reg, R92C_TXAGC_A_CCK2, power[RTWN_RIDX_CCK2]); 170 reg = RW(reg, R92C_TXAGC_A_CCK55, power[RTWN_RIDX_CCK55]); 171 reg = RW(reg, R92C_TXAGC_A_CCK11, power[RTWN_RIDX_CCK11]); 172 rtwn_bb_write(sc, R92C_TXAGC_B_CCK11_A_CCK2_11, reg); 173 } else { 174 reg = rtwn_bb_read(sc, R92C_TXAGC_B_CCK1_55_MCS32); 175 reg = RW(reg, R92C_TXAGC_B_CCK1, power[RTWN_RIDX_CCK1]); 176 reg = RW(reg, R92C_TXAGC_B_CCK2, power[RTWN_RIDX_CCK2]); 177 reg = RW(reg, R92C_TXAGC_B_CCK55, power[RTWN_RIDX_CCK55]); 178 rtwn_bb_write(sc, R92C_TXAGC_B_CCK1_55_MCS32, reg); 179 reg = rtwn_bb_read(sc, R92C_TXAGC_B_CCK11_A_CCK2_11); 180 reg = RW(reg, R92C_TXAGC_B_CCK11, power[RTWN_RIDX_CCK11]); 181 rtwn_bb_write(sc, R92C_TXAGC_B_CCK11_A_CCK2_11, reg); 182 } 183 /* Write per-OFDM rate Tx power. */ 184 rtwn_bb_write(sc, R92C_TXAGC_RATE18_06(chain), 185 SM(R92C_TXAGC_RATE06, power[RTWN_RIDX_OFDM6]) | 186 SM(R92C_TXAGC_RATE09, power[RTWN_RIDX_OFDM9]) | 187 SM(R92C_TXAGC_RATE12, power[RTWN_RIDX_OFDM12]) | 188 SM(R92C_TXAGC_RATE18, power[RTWN_RIDX_OFDM18])); 189 rtwn_bb_write(sc, R92C_TXAGC_RATE54_24(chain), 190 SM(R92C_TXAGC_RATE24, power[RTWN_RIDX_OFDM24]) | 191 SM(R92C_TXAGC_RATE36, power[RTWN_RIDX_OFDM36]) | 192 SM(R92C_TXAGC_RATE48, power[RTWN_RIDX_OFDM48]) | 193 SM(R92C_TXAGC_RATE54, power[RTWN_RIDX_OFDM54])); 194 /* Write per-MCS Tx power. */ 195 rtwn_bb_write(sc, R92C_TXAGC_MCS03_MCS00(chain), 196 SM(R92C_TXAGC_MCS00, power[RTWN_RIDX_HT_MCS(0)]) | 197 SM(R92C_TXAGC_MCS01, power[RTWN_RIDX_HT_MCS(1)]) | 198 SM(R92C_TXAGC_MCS02, power[RTWN_RIDX_HT_MCS(2)]) | 199 SM(R92C_TXAGC_MCS03, power[RTWN_RIDX_HT_MCS(3)])); 200 rtwn_bb_write(sc, R92C_TXAGC_MCS07_MCS04(chain), 201 SM(R92C_TXAGC_MCS04, power[RTWN_RIDX_HT_MCS(4)]) | 202 SM(R92C_TXAGC_MCS05, power[RTWN_RIDX_HT_MCS(5)]) | 203 SM(R92C_TXAGC_MCS06, power[RTWN_RIDX_HT_MCS(6)]) | 204 SM(R92C_TXAGC_MCS07, power[RTWN_RIDX_HT_MCS(7)])); 205 if (sc->ntxchains >= 2) { 206 rtwn_bb_write(sc, R92C_TXAGC_MCS11_MCS08(chain), 207 SM(R92C_TXAGC_MCS08, power[RTWN_RIDX_HT_MCS(8)]) | 208 SM(R92C_TXAGC_MCS09, power[RTWN_RIDX_HT_MCS(9)]) | 209 SM(R92C_TXAGC_MCS10, power[RTWN_RIDX_HT_MCS(10)]) | 210 SM(R92C_TXAGC_MCS11, power[RTWN_RIDX_HT_MCS(11)])); 211 rtwn_bb_write(sc, R92C_TXAGC_MCS15_MCS12(chain), 212 SM(R92C_TXAGC_MCS12, power[RTWN_RIDX_HT_MCS(12)]) | 213 SM(R92C_TXAGC_MCS13, power[RTWN_RIDX_HT_MCS(13)]) | 214 SM(R92C_TXAGC_MCS14, power[RTWN_RIDX_HT_MCS(14)]) | 215 SM(R92C_TXAGC_MCS15, power[RTWN_RIDX_HT_MCS(15)])); 216 } 217 } 218 219 static void 220 r92c_set_txpower(struct rtwn_softc *sc, struct ieee80211_channel *c) 221 { 222 uint8_t power[RTWN_RIDX_COUNT]; 223 int i; 224 225 for (i = 0; i < sc->ntxchains; i++) { 226 memset(power, 0, sizeof(power)); 227 /* Compute per-rate Tx power values. */ 228 rtwn_r92c_get_txpower(sc, i, c, power); 229 #ifdef RTWN_DEBUG 230 if (sc->sc_debug & RTWN_DEBUG_TXPWR) { 231 int max_mcs, ridx; 232 233 max_mcs = RTWN_RIDX_HT_MCS(sc->ntxchains * 8 - 1); 234 235 /* Dump per-rate Tx power values. */ 236 printf("Tx power for chain %d:\n", i); 237 for (ridx = RTWN_RIDX_CCK1; ridx <= max_mcs; ridx++) 238 printf("Rate %d = %u\n", ridx, power[ridx]); 239 } 240 #endif 241 /* Write per-rate Tx power values to hardware. */ 242 r92c_write_txpower(sc, i, power); 243 } 244 } 245 246 static void 247 r92c_set_bw40(struct rtwn_softc *sc, uint8_t chan, int prichlo) 248 { 249 struct r92c_softc *rs = sc->sc_priv; 250 251 rtwn_setbits_1(sc, R92C_BWOPMODE, R92C_BWOPMODE_20MHZ, 0); 252 rtwn_setbits_1(sc, R92C_RRSR + 2, 0x6f, (prichlo ? 1 : 2) << 5); 253 254 rtwn_bb_setbits(sc, R92C_FPGA0_RFMOD, 0, R92C_RFMOD_40MHZ); 255 rtwn_bb_setbits(sc, R92C_FPGA1_RFMOD, 0, R92C_RFMOD_40MHZ); 256 257 /* Set CCK side band. */ 258 rtwn_bb_setbits(sc, R92C_CCK0_SYSTEM, 0x10, 259 (prichlo ? 0 : 1) << 4); 260 261 rtwn_bb_setbits(sc, R92C_OFDM1_LSTF, 0x0c00, 262 (prichlo ? 1 : 2) << 10); 263 264 rtwn_bb_setbits(sc, R92C_FPGA0_ANAPARAM2, 265 R92C_FPGA0_ANAPARAM2_CBW20, 0); 266 267 rtwn_bb_setbits(sc, 0x818, 0x0c000000, (prichlo ? 2 : 1) << 26); 268 269 /* Select 40MHz bandwidth. */ 270 rtwn_rf_write(sc, 0, R92C_RF_CHNLBW, 271 (rs->rf_chnlbw[0] & ~0xfff) | chan); 272 } 273 274 void 275 r92c_set_bw20(struct rtwn_softc *sc, uint8_t chan) 276 { 277 struct r92c_softc *rs = sc->sc_priv; 278 279 rtwn_setbits_1(sc, R92C_BWOPMODE, 0, R92C_BWOPMODE_20MHZ); 280 281 rtwn_bb_setbits(sc, R92C_FPGA0_RFMOD, R92C_RFMOD_40MHZ, 0); 282 rtwn_bb_setbits(sc, R92C_FPGA1_RFMOD, R92C_RFMOD_40MHZ, 0); 283 284 rtwn_bb_setbits(sc, R92C_FPGA0_ANAPARAM2, 0, 285 R92C_FPGA0_ANAPARAM2_CBW20); 286 287 /* Select 20MHz bandwidth. */ 288 rtwn_rf_write(sc, 0, R92C_RF_CHNLBW, 289 (rs->rf_chnlbw[0] & ~0xfff) | chan | R92C_RF_CHNLBW_BW20); 290 } 291 292 void 293 r92c_set_chan(struct rtwn_softc *sc, struct ieee80211_channel *c) 294 { 295 struct r92c_softc *rs = sc->sc_priv; 296 u_int chan; 297 int i; 298 299 chan = rtwn_chan2centieee(c); 300 301 /* Set Tx power for this new channel. */ 302 r92c_set_txpower(sc, c); 303 304 for (i = 0; i < sc->nrxchains; i++) { 305 rtwn_rf_write(sc, i, R92C_RF_CHNLBW, 306 RW(rs->rf_chnlbw[i], R92C_RF_CHNLBW_CHNL, chan)); 307 } 308 if (IEEE80211_IS_CHAN_HT40(c)) 309 r92c_set_bw40(sc, chan, IEEE80211_IS_CHAN_HT40U(c)); 310 else 311 rtwn_r92c_set_bw20(sc, chan); 312 } 313 314 void 315 r92c_set_gain(struct rtwn_softc *sc, uint8_t gain) 316 { 317 318 rtwn_bb_setbits(sc, R92C_OFDM0_AGCCORE1(0), 319 R92C_OFDM0_AGCCORE1_GAIN_M, gain); 320 rtwn_bb_setbits(sc, R92C_OFDM0_AGCCORE1(1), 321 R92C_OFDM0_AGCCORE1_GAIN_M, gain); 322 } 323 324 void 325 r92c_scan_start(struct ieee80211com *ic) 326 { 327 struct rtwn_softc *sc = ic->ic_softc; 328 struct r92c_softc *rs = sc->sc_priv; 329 330 RTWN_LOCK(sc); 331 /* Set gain for scanning. */ 332 rtwn_r92c_set_gain(sc, 0x20); 333 RTWN_UNLOCK(sc); 334 335 rs->rs_scan_start(ic); 336 } 337 338 void 339 r92c_scan_end(struct ieee80211com *ic) 340 { 341 struct rtwn_softc *sc = ic->ic_softc; 342 struct r92c_softc *rs = sc->sc_priv; 343 344 RTWN_LOCK(sc); 345 /* Set gain under link. */ 346 rtwn_r92c_set_gain(sc, 0x32); 347 RTWN_UNLOCK(sc); 348 349 rs->rs_scan_end(ic); 350 } 351