Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/rtwn/rtl8192c/r92c_calib.c
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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 #include <dev/rtwn/if_rtwn_debug.h> 50 51 #include <dev/rtwn/rtl8192c/r92c.h> 52 #include <dev/rtwn/rtl8192c/r92c_reg.h> 53 54 /* Registers to save and restore during IQ calibration. */ 55 struct r92c_iq_cal_reg_vals { 56 uint32_t adda[16]; 57 uint8_t txpause; 58 uint8_t bcn_ctrl[2]; 59 uint32_t gpio_muxcfg; 60 uint32_t cck0_afesetting; 61 uint32_t ofdm0_trxpathena; 62 uint32_t ofdm0_trmuxpar; 63 uint32_t fpga0_rfifacesw0; 64 uint32_t fpga0_rfifacesw1; 65 uint32_t fpga0_rfifaceoe0; 66 uint32_t fpga0_rfifaceoe1; 67 uint32_t config_ant0; 68 uint32_t config_ant1; 69 }; 70 71 /* XXX TODO: merge */ 72 static int 73 r92c_iq_calib_chain(struct rtwn_softc *sc, int chain, uint16_t tx[2], 74 uint16_t rx[2]) 75 { 76 uint32_t status; 77 78 if (chain == 0) { /* IQ calibration for chain 0. */ 79 /* IQ calibration settings for chain 0. */ 80 rtwn_bb_write(sc, R92C_TX_IQK_TONE(0), 0x10008c1f); 81 rtwn_bb_write(sc, R92C_RX_IQK_TONE(0), 0x10008c1f); 82 rtwn_bb_write(sc, R92C_TX_IQK_PI(0), 0x82140102); 83 84 if (sc->ntxchains > 1) { 85 rtwn_bb_write(sc, R92C_RX_IQK_PI(0), 0x28160202); 86 /* IQ calibration settings for chain 1. */ 87 rtwn_bb_write(sc, R92C_TX_IQK_TONE(1), 0x10008c22); 88 rtwn_bb_write(sc, R92C_RX_IQK_TONE(1), 0x10008c22); 89 rtwn_bb_write(sc, R92C_TX_IQK_PI(1), 0x82140102); 90 rtwn_bb_write(sc, R92C_RX_IQK_PI(1), 0x28160202); 91 } else 92 rtwn_bb_write(sc, R92C_RX_IQK_PI(0), 0x28160502); 93 94 /* LO calibration settings. */ 95 rtwn_bb_write(sc, R92C_IQK_AGC_RSP, 0x001028d1); 96 /* We're doing LO and IQ calibration in one shot. */ 97 rtwn_bb_write(sc, R92C_IQK_AGC_PTS, 0xf9000000); 98 rtwn_bb_write(sc, R92C_IQK_AGC_PTS, 0xf8000000); 99 100 } else { /* IQ calibration for chain 1. */ 101 /* We're doing LO and IQ calibration in one shot. */ 102 rtwn_bb_write(sc, R92C_IQK_AGC_CONT, 2); 103 rtwn_bb_write(sc, R92C_IQK_AGC_CONT, 0); 104 } 105 106 /* Give LO and IQ calibrations the time to complete. */ 107 rtwn_delay(sc, 10000); 108 109 /* Read IQ calibration status. */ 110 status = rtwn_bb_read(sc, R92C_RX_POWER_IQK_AFTER(0)); 111 112 if (status & (1 << (28 + chain * 3))) 113 return (0); /* Tx failed. */ 114 /* Read Tx IQ calibration results. */ 115 tx[0] = MS(rtwn_bb_read(sc, R92C_TX_POWER_IQK_BEFORE(chain)), 116 R92C_POWER_IQK_RESULT); 117 tx[1] = MS(rtwn_bb_read(sc, R92C_TX_POWER_IQK_AFTER(chain)), 118 R92C_POWER_IQK_RESULT); 119 if (tx[0] == 0x142 || tx[1] == 0x042) 120 return (0); /* Tx failed. */ 121 122 if (status & (1 << (27 + chain * 3))) 123 return (1); /* Rx failed. */ 124 /* Read Rx IQ calibration results. */ 125 rx[0] = MS(rtwn_bb_read(sc, R92C_RX_POWER_IQK_BEFORE(chain)), 126 R92C_POWER_IQK_RESULT); 127 rx[1] = MS(rtwn_bb_read(sc, R92C_RX_POWER_IQK_AFTER(chain)), 128 R92C_POWER_IQK_RESULT); 129 if (rx[0] == 0x132 || rx[1] == 0x036) 130 return (1); /* Rx failed. */ 131 132 return (3); /* Both Tx and Rx succeeded. */ 133 } 134 135 static void 136 r92c_iq_calib_run(struct rtwn_softc *sc, int n, uint16_t tx[2][2], 137 uint16_t rx[2][2], struct r92c_iq_cal_reg_vals *vals) 138 { 139 /* Registers to save and restore during IQ calibration. */ 140 static const uint16_t reg_adda[16] = { 141 0x85c, 0xe6c, 0xe70, 0xe74, 142 0xe78, 0xe7c, 0xe80, 0xe84, 143 0xe88, 0xe8c, 0xed0, 0xed4, 144 0xed8, 0xedc, 0xee0, 0xeec 145 }; 146 int i, chain; 147 uint32_t hssi_param1; 148 149 if (n == 0) { 150 for (i = 0; i < nitems(reg_adda); i++) 151 vals->adda[i] = rtwn_bb_read(sc, reg_adda[i]); 152 153 vals->txpause = rtwn_read_1(sc, R92C_TXPAUSE); 154 vals->bcn_ctrl[0] = rtwn_read_1(sc, R92C_BCN_CTRL(0)); 155 vals->bcn_ctrl[1] = rtwn_read_1(sc, R92C_BCN_CTRL(1)); 156 vals->gpio_muxcfg = rtwn_read_4(sc, R92C_GPIO_MUXCFG); 157 } 158 159 if (sc->ntxchains == 1) { 160 rtwn_bb_write(sc, reg_adda[0], 0x0b1b25a0); 161 for (i = 1; i < nitems(reg_adda); i++) 162 rtwn_bb_write(sc, reg_adda[i], 0x0bdb25a0); 163 } else { 164 for (i = 0; i < nitems(reg_adda); i++) 165 rtwn_bb_write(sc, reg_adda[i], 0x04db25a4); 166 } 167 168 hssi_param1 = rtwn_bb_read(sc, R92C_HSSI_PARAM1(0)); 169 if (!(hssi_param1 & R92C_HSSI_PARAM1_PI)) { 170 rtwn_bb_write(sc, R92C_HSSI_PARAM1(0), 171 hssi_param1 | R92C_HSSI_PARAM1_PI); 172 rtwn_bb_write(sc, R92C_HSSI_PARAM1(1), 173 hssi_param1 | R92C_HSSI_PARAM1_PI); 174 } 175 176 if (n == 0) { 177 vals->cck0_afesetting = rtwn_bb_read(sc, R92C_CCK0_AFESETTING); 178 vals->ofdm0_trxpathena = 179 rtwn_bb_read(sc, R92C_OFDM0_TRXPATHENA); 180 vals->ofdm0_trmuxpar = rtwn_bb_read(sc, R92C_OFDM0_TRMUXPAR); 181 vals->fpga0_rfifacesw0 = 182 rtwn_bb_read(sc, R92C_FPGA0_RFIFACESW(0)); 183 vals->fpga0_rfifacesw1 = 184 rtwn_bb_read(sc, R92C_FPGA0_RFIFACESW(1)); 185 vals->fpga0_rfifaceoe0 = 186 rtwn_bb_read(sc, R92C_FPGA0_RFIFACEOE(0)); 187 vals->fpga0_rfifaceoe1 = 188 rtwn_bb_read(sc, R92C_FPGA0_RFIFACEOE(1)); 189 vals->config_ant0 = rtwn_bb_read(sc, R92C_CONFIG_ANT(0)); 190 vals->config_ant1 = rtwn_bb_read(sc, R92C_CONFIG_ANT(1)); 191 } 192 193 rtwn_bb_setbits(sc, R92C_CCK0_AFESETTING, 0, 0x0f000000); 194 rtwn_bb_write(sc, R92C_OFDM0_TRXPATHENA, 0x03a05600); 195 rtwn_bb_write(sc, R92C_OFDM0_TRMUXPAR, 0x000800e4); 196 rtwn_bb_write(sc, R92C_FPGA0_RFIFACESW(1), 0x22204000); 197 rtwn_bb_setbits(sc, R92C_FPGA0_RFIFACESW(0), 0, 0x04000400); 198 rtwn_bb_setbits(sc, R92C_FPGA0_RFIFACEOE(0), 0x400, 0); 199 rtwn_bb_setbits(sc, R92C_FPGA0_RFIFACEOE(1), 0x400, 0); 200 201 if (sc->ntxchains > 1) { 202 rtwn_bb_write(sc, R92C_LSSI_PARAM(0), 0x00010000); 203 rtwn_bb_write(sc, R92C_LSSI_PARAM(1), 0x00010000); 204 } 205 206 rtwn_write_1(sc, R92C_TXPAUSE, 207 R92C_TX_QUEUE_AC | R92C_TX_QUEUE_MGT | R92C_TX_QUEUE_HIGH); 208 rtwn_write_1(sc, R92C_BCN_CTRL(0), 209 vals->bcn_ctrl[0] & ~R92C_BCN_CTRL_EN_BCN); 210 rtwn_write_1(sc, R92C_BCN_CTRL(1), 211 vals->bcn_ctrl[1] & ~R92C_BCN_CTRL_EN_BCN); 212 rtwn_write_1(sc, R92C_GPIO_MUXCFG, 213 vals->gpio_muxcfg & ~R92C_GPIO_MUXCFG_ENBT); 214 215 rtwn_bb_write(sc, R92C_CONFIG_ANT(0), 0x00080000); 216 if (sc->ntxchains > 1) 217 rtwn_bb_write(sc, R92C_CONFIG_ANT(1), 0x00080000); 218 219 rtwn_bb_write(sc, R92C_FPGA0_IQK, 0x80800000); 220 rtwn_bb_write(sc, R92C_TX_IQK, 0x01007c00); 221 rtwn_bb_write(sc, R92C_RX_IQK, 0x01004800); 222 223 for (chain = 0; chain < sc->ntxchains; chain++) { 224 if (chain > 0) { 225 /* Put chain 0 on standby. */ 226 rtwn_bb_write(sc, R92C_FPGA0_IQK, 0); 227 rtwn_bb_write(sc, R92C_LSSI_PARAM(0), 0x00010000); 228 rtwn_bb_write(sc, R92C_FPGA0_IQK, 0x80800000); 229 230 /* Enable chain 1. */ 231 for (i = 0; i < nitems(reg_adda); i++) 232 rtwn_bb_write(sc, reg_adda[i], 0x0b1b25a4); 233 } 234 235 /* Run IQ calibration twice. */ 236 for (i = 0; i < 2; i++) { 237 int ret; 238 239 ret = r92c_iq_calib_chain(sc, chain, 240 tx[chain], rx[chain]); 241 if (ret == 0) { 242 RTWN_DPRINTF(sc, RTWN_DEBUG_CALIB, 243 "%s: chain %d: Tx failed.\n", 244 __func__, chain); 245 tx[chain][0] = 0xff; 246 tx[chain][1] = 0xff; 247 rx[chain][0] = 0xff; 248 rx[chain][1] = 0xff; 249 } else if (ret == 1) { 250 RTWN_DPRINTF(sc, RTWN_DEBUG_CALIB, 251 "%s: chain %d: Rx failed.\n", 252 __func__, chain); 253 rx[chain][0] = 0xff; 254 rx[chain][1] = 0xff; 255 } else if (ret == 3) { 256 RTWN_DPRINTF(sc, RTWN_DEBUG_CALIB, 257 "%s: chain %d: Both Tx and Rx " 258 "succeeded.\n", __func__, chain); 259 } 260 } 261 262 RTWN_DPRINTF(sc, RTWN_DEBUG_CALIB, 263 "%s: results for run %d chain %d: tx[0] 0x%x, " 264 "tx[1] 0x%x, rx[0] 0x%x, rx[1] 0x%x\n", __func__, n, chain, 265 tx[chain][0], tx[chain][1], rx[chain][0], rx[chain][1]); 266 } 267 268 rtwn_bb_write(sc, R92C_CCK0_AFESETTING, vals->cck0_afesetting); 269 rtwn_bb_write(sc, R92C_OFDM0_TRXPATHENA, vals->ofdm0_trxpathena); 270 rtwn_bb_write(sc, R92C_FPGA0_RFIFACESW(0), vals->fpga0_rfifacesw0); 271 rtwn_bb_write(sc, R92C_FPGA0_RFIFACESW(1), vals->fpga0_rfifacesw1); 272 rtwn_bb_write(sc, R92C_OFDM0_TRMUXPAR, vals->ofdm0_trmuxpar); 273 rtwn_bb_write(sc, R92C_FPGA0_RFIFACEOE(0), vals->fpga0_rfifaceoe0); 274 rtwn_bb_write(sc, R92C_FPGA0_RFIFACEOE(1), vals->fpga0_rfifaceoe1); 275 rtwn_bb_write(sc, R92C_CONFIG_ANT(0), vals->config_ant0); 276 rtwn_bb_write(sc, R92C_CONFIG_ANT(1), vals->config_ant1); 277 278 rtwn_bb_write(sc, R92C_FPGA0_IQK, 0); 279 rtwn_bb_write(sc, R92C_LSSI_PARAM(0), 0x00032ed3); 280 if (sc->ntxchains > 1) 281 rtwn_bb_write(sc, R92C_LSSI_PARAM(1), 0x00032ed3); 282 283 if (n != 0) { 284 if (!(hssi_param1 & R92C_HSSI_PARAM1_PI)) { 285 rtwn_bb_write(sc, R92C_HSSI_PARAM1(0), hssi_param1); 286 rtwn_bb_write(sc, R92C_HSSI_PARAM1(1), hssi_param1); 287 } 288 289 for (i = 0; i < nitems(reg_adda); i++) 290 rtwn_bb_write(sc, reg_adda[i], vals->adda[i]); 291 292 rtwn_write_1(sc, R92C_TXPAUSE, vals->txpause); 293 rtwn_write_1(sc, R92C_BCN_CTRL(0), vals->bcn_ctrl[0]); 294 rtwn_write_1(sc, R92C_BCN_CTRL(1), vals->bcn_ctrl[1]); 295 rtwn_write_4(sc, R92C_GPIO_MUXCFG, vals->gpio_muxcfg); 296 297 rtwn_bb_write(sc, R92C_TX_IQK_TONE(0), 0x01008c00); 298 rtwn_bb_write(sc, R92C_RX_IQK_TONE(0), 0x01008c00); 299 } 300 } 301 302 #define RTWN_IQ_CAL_MAX_TOLERANCE 5 303 static int 304 r92c_iq_calib_compare_results(struct rtwn_softc *sc, uint16_t tx1[2][2], 305 uint16_t rx1[2][2], uint16_t tx2[2][2], uint16_t rx2[2][2]) 306 { 307 int chain, i, tx_ok[2], rx_ok[2]; 308 309 tx_ok[0] = tx_ok[1] = rx_ok[0] = rx_ok[1] = 0; 310 for (chain = 0; chain < sc->ntxchains; chain++) { 311 for (i = 0; i < 2; i++) { 312 if (tx1[chain][i] == 0xff || tx2[chain][i] == 0xff || 313 rx1[chain][i] == 0xff || rx2[chain][i] == 0xff) 314 continue; 315 316 tx_ok[chain] = (abs(tx1[chain][i] - tx2[chain][i]) <= 317 RTWN_IQ_CAL_MAX_TOLERANCE); 318 319 rx_ok[chain] = (abs(rx1[chain][i] - rx2[chain][i]) <= 320 RTWN_IQ_CAL_MAX_TOLERANCE); 321 } 322 } 323 324 if (sc->ntxchains > 1) 325 return (tx_ok[0] && tx_ok[1] && rx_ok[0] && rx_ok[1]); 326 else 327 return (tx_ok[0] && rx_ok[0]); 328 } 329 #undef RTWN_IQ_CAL_MAX_TOLERANCE 330 331 static void 332 r92c_iq_calib_write_results(struct rtwn_softc *sc, uint16_t tx[2], 333 uint16_t rx[2], int chain) 334 { 335 uint32_t reg, val, x; 336 long y, tx_c; 337 338 if (tx[0] == 0xff || tx[1] == 0xff) 339 return; 340 341 reg = rtwn_bb_read(sc, R92C_OFDM0_TXIQIMBALANCE(chain)); 342 val = ((reg >> 22) & 0x3ff); 343 x = tx[0]; 344 if (x & 0x00000200) 345 x |= 0xfffffc00; 346 reg = (((x * val) >> 8) & 0x3ff); 347 rtwn_bb_setbits(sc, R92C_OFDM0_TXIQIMBALANCE(chain), 0x3ff, reg); 348 rtwn_bb_setbits(sc, R92C_OFDM0_ECCATHRESHOLD, 0x80000000, 349 ((x * val) & 0x80) << 24); 350 351 y = tx[1]; 352 if (y & 0x00000200) 353 y |= 0xfffffc00; 354 tx_c = (y * val) >> 8; 355 rtwn_bb_setbits(sc, R92C_OFDM0_TXAFE(chain), 0xf0000000, 356 (tx_c & 0x3c0) << 22); 357 rtwn_bb_setbits(sc, R92C_OFDM0_TXIQIMBALANCE(chain), 0x003f0000, 358 (tx_c & 0x3f) << 16); 359 rtwn_bb_setbits(sc, R92C_OFDM0_ECCATHRESHOLD, 0x20000000, 360 ((y * val) & 0x80) << 22); 361 362 if (rx[0] == 0xff || rx[1] == 0xff) 363 return; 364 365 rtwn_bb_setbits(sc, R92C_OFDM0_RXIQIMBALANCE(chain), 0x3ff, 366 rx[0] & 0x3ff); 367 rtwn_bb_setbits(sc, R92C_OFDM0_RXIQIMBALANCE(chain), 0xfc00, 368 (rx[1] & 0x3f) << 10); 369 370 if (chain == 0) { 371 rtwn_bb_setbits(sc, R92C_OFDM0_RXIQEXTANTA, 0xf0000000, 372 (rx[1] & 0x3c0) << 22); 373 } else { 374 rtwn_bb_setbits(sc, R92C_OFDM0_AGCRSSITABLE, 0xf000, 375 (rx[1] & 0x3c0) << 6); 376 } 377 } 378 379 #define RTWN_IQ_CAL_NRUN 3 380 void 381 r92c_iq_calib(struct rtwn_softc *sc) 382 { 383 struct r92c_iq_cal_reg_vals vals; 384 uint16_t tx[RTWN_IQ_CAL_NRUN][2][2], rx[RTWN_IQ_CAL_NRUN][2][2]; 385 int n, valid; 386 387 valid = 0; 388 for (n = 0; n < RTWN_IQ_CAL_NRUN; n++) { 389 r92c_iq_calib_run(sc, n, tx[n], rx[n], &vals); 390 391 if (n == 0) 392 continue; 393 394 /* Valid results remain stable after consecutive runs. */ 395 valid = r92c_iq_calib_compare_results(sc, tx[n - 1], 396 rx[n - 1], tx[n], rx[n]); 397 if (valid) 398 break; 399 } 400 401 if (valid) { 402 r92c_iq_calib_write_results(sc, tx[n][0], rx[n][0], 0); 403 if (sc->ntxchains > 1) 404 r92c_iq_calib_write_results(sc, tx[n][1], rx[n][1], 1); 405 } 406 } 407 #undef RTWN_IQ_CAL_NRUN 408 409 void 410 r92c_lc_calib(struct rtwn_softc *sc) 411 { 412 uint32_t rf_ac[2]; 413 uint8_t txmode; 414 int i; 415 416 txmode = rtwn_read_1(sc, R92C_OFDM1_LSTF + 3); 417 if ((txmode & 0x70) != 0) { 418 /* Disable all continuous Tx. */ 419 rtwn_write_1(sc, R92C_OFDM1_LSTF + 3, txmode & ~0x70); 420 421 /* Set RF mode to standby mode. */ 422 for (i = 0; i < sc->nrxchains; i++) { 423 rf_ac[i] = rtwn_rf_read(sc, i, R92C_RF_AC); 424 rtwn_rf_write(sc, i, R92C_RF_AC, 425 RW(rf_ac[i], R92C_RF_AC_MODE, 426 R92C_RF_AC_MODE_STANDBY)); 427 } 428 } else { 429 /* Block all Tx queues. */ 430 rtwn_write_1(sc, R92C_TXPAUSE, R92C_TX_QUEUE_ALL); 431 } 432 /* Start calibration. */ 433 rtwn_rf_setbits(sc, 0, R92C_RF_CHNLBW, 0, R92C_RF_CHNLBW_LCSTART); 434 435 /* Give calibration the time to complete. */ 436 rtwn_delay(sc, 100000); /* 100ms */ 437 438 /* Restore configuration. */ 439 if ((txmode & 0x70) != 0) { 440 /* Restore Tx mode. */ 441 rtwn_write_1(sc, R92C_OFDM1_LSTF + 3, txmode); 442 /* Restore RF mode. */ 443 for (i = 0; i < sc->nrxchains; i++) 444 rtwn_rf_write(sc, i, R92C_RF_AC, rf_ac[i]); 445 } else { 446 /* Unblock all Tx queues. */ 447 rtwn_write_1(sc, R92C_TXPAUSE, 0x00); 448 } 449 } 450 451 void 452 r92c_temp_measure(struct rtwn_softc *sc) 453 { 454 rtwn_rf_write(sc, 0, R92C_RF_T_METER, R92C_RF_T_METER_START); 455 } 456 457 uint8_t 458 r92c_temp_read(struct rtwn_softc *sc) 459 { 460 return (MS(rtwn_rf_read(sc, 0, R92C_RF_T_METER), 461 R92C_RF_T_METER_VAL)); 462 }
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