1 /* 2 * Copyright (c) 2009-2011 Atheros Communications Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/export.h> 18 #include "hw.h" 19 20 enum ath_bt_mode { 21 ATH_BT_COEX_MODE_LEGACY, /* legacy rx_clear mode */ 22 ATH_BT_COEX_MODE_UNSLOTTED, /* untimed/unslotted mode */ 23 ATH_BT_COEX_MODE_SLOTTED, /* slotted mode */ 24 ATH_BT_COEX_MODE_DISABLED, /* coexistence disabled */ 25 }; 26 27 struct ath_btcoex_config { 28 u8 bt_time_extend; 29 bool bt_txstate_extend; 30 bool bt_txframe_extend; 31 enum ath_bt_mode bt_mode; /* coexistence mode */ 32 bool bt_quiet_collision; 33 bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/ 34 u8 bt_priority_time; 35 u8 bt_first_slot_time; 36 bool bt_hold_rx_clear; 37 }; 38 39 static const u32 ar9003_wlan_weights[ATH_BTCOEX_STOMP_MAX] 40 [AR9300_NUM_WLAN_WEIGHTS] = { 41 { 0xfffffff0, 0xfffffff0, 0xfffffff0, 0xfffffff0 }, /* STOMP_ALL */ 42 { 0x88888880, 0x88888880, 0x88888880, 0x88888880 }, /* STOMP_LOW */ 43 { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* STOMP_NONE */ 44 }; 45 46 static const u32 mci_wlan_weights[ATH_BTCOEX_STOMP_MAX] 47 [AR9300_NUM_WLAN_WEIGHTS] = { 48 { 0x01017d01, 0x41414101, 0x41414101, 0x41414141 }, /* STOMP_ALL */ 49 { 0x01017d01, 0x3b3b3b01, 0x3b3b3b01, 0x3b3b3b3b }, /* STOMP_LOW */ 50 { 0x01017d01, 0x01010101, 0x01010101, 0x01010101 }, /* STOMP_NONE */ 51 { 0x01017d01, 0x013b0101, 0x3b3b0101, 0x3b3b013b }, /* STOMP_LOW_FTP */ 52 { 0xffffff01, 0xffffffff, 0xffffff01, 0xffffffff }, /* STOMP_AUDIO */ 53 }; 54 55 void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum) 56 { 57 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 58 const struct ath_btcoex_config ath_bt_config = { 59 .bt_time_extend = 0, 60 .bt_txstate_extend = true, 61 .bt_txframe_extend = true, 62 .bt_mode = ATH_BT_COEX_MODE_SLOTTED, 63 .bt_quiet_collision = true, 64 .bt_rxclear_polarity = true, 65 .bt_priority_time = 2, 66 .bt_first_slot_time = 5, 67 .bt_hold_rx_clear = true, 68 }; 69 bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity; 70 71 if (AR_SREV_9300_20_OR_LATER(ah)) 72 rxclear_polarity = !ath_bt_config.bt_rxclear_polarity; 73 74 btcoex_hw->bt_coex_mode = 75 (btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) | 76 SM(ath_bt_config.bt_time_extend, AR_BT_TIME_EXTEND) | 77 SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) | 78 SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) | 79 SM(ath_bt_config.bt_mode, AR_BT_MODE) | 80 SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) | 81 SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) | 82 SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) | 83 SM(ath_bt_config.bt_first_slot_time, AR_BT_FIRST_SLOT_TIME) | 84 SM(qnum, AR_BT_QCU_THRESH); 85 86 btcoex_hw->bt_coex_mode2 = 87 SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) | 88 SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) | 89 AR_BT_DISABLE_BT_ANT; 90 } 91 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw); 92 93 void ath9k_hw_btcoex_init_scheme(struct ath_hw *ah) 94 { 95 struct ath_common *common = ath9k_hw_common(ah); 96 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 97 98 /* 99 * Check if BTCOEX is globally disabled. 100 */ 101 if (!common->btcoex_enabled) { 102 btcoex_hw->scheme = ATH_BTCOEX_CFG_NONE; 103 return; 104 } 105 106 if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) { 107 btcoex_hw->scheme = ATH_BTCOEX_CFG_MCI; 108 } else if (AR_SREV_9300_20_OR_LATER(ah)) { 109 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE; 110 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9300; 111 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9300; 112 btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9300; 113 } else if (AR_SREV_9280_20_OR_LATER(ah)) { 114 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9280; 115 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9280; 116 117 if (AR_SREV_9285(ah)) { 118 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE; 119 btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9285; 120 } else { 121 btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE; 122 } 123 } 124 } 125 EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme); 126 127 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah) 128 { 129 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 130 131 /* connect bt_active to baseband */ 132 REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL, 133 (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF | 134 AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF)); 135 136 REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL, 137 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB); 138 139 /* Set input mux for bt_active to gpio pin */ 140 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1, 141 AR_GPIO_INPUT_MUX1_BT_ACTIVE, 142 btcoex_hw->btactive_gpio); 143 144 /* Configure the desired gpio port for input */ 145 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio); 146 } 147 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire); 148 149 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah) 150 { 151 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 152 153 /* btcoex 3-wire */ 154 REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL, 155 (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB | 156 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB)); 157 158 /* Set input mux for bt_prority_async and 159 * bt_active_async to GPIO pins */ 160 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1, 161 AR_GPIO_INPUT_MUX1_BT_ACTIVE, 162 btcoex_hw->btactive_gpio); 163 164 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1, 165 AR_GPIO_INPUT_MUX1_BT_PRIORITY, 166 btcoex_hw->btpriority_gpio); 167 168 /* Configure the desired GPIO ports for input */ 169 170 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio); 171 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio); 172 } 173 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire); 174 175 void ath9k_hw_btcoex_init_mci(struct ath_hw *ah) 176 { 177 ah->btcoex_hw.mci.ready = false; 178 ah->btcoex_hw.mci.bt_state = 0; 179 ah->btcoex_hw.mci.bt_ver_major = 3; 180 ah->btcoex_hw.mci.bt_ver_minor = 0; 181 ah->btcoex_hw.mci.bt_version_known = false; 182 ah->btcoex_hw.mci.update_2g5g = true; 183 ah->btcoex_hw.mci.is_2g = true; 184 ah->btcoex_hw.mci.wlan_channels_update = false; 185 ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000; 186 ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff; 187 ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff; 188 ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff; 189 ah->btcoex_hw.mci.query_bt = true; 190 ah->btcoex_hw.mci.unhalt_bt_gpm = true; 191 ah->btcoex_hw.mci.halted_bt_gpm = false; 192 ah->btcoex_hw.mci.need_flush_btinfo = false; 193 ah->btcoex_hw.mci.wlan_cal_seq = 0; 194 ah->btcoex_hw.mci.wlan_cal_done = 0; 195 ah->btcoex_hw.mci.config = (AR_SREV_9462(ah)) ? 0x2201 : 0xa4c1; 196 } 197 EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci); 198 199 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah) 200 { 201 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 202 203 /* Configure the desired GPIO port for TX_FRAME output */ 204 ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio, 205 AR_GPIO_OUTPUT_MUX_AS_TX_FRAME); 206 } 207 208 /* 209 * For AR9002, bt_weight/wlan_weight are used. 210 * For AR9003 and above, stomp_type is used. 211 */ 212 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah, 213 u32 bt_weight, 214 u32 wlan_weight, 215 enum ath_stomp_type stomp_type) 216 { 217 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 218 struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci; 219 u8 txprio_shift[] = { 24, 16, 16, 0 }; /* tx priority weight */ 220 bool concur_tx = (mci_hw->concur_tx && btcoex_hw->tx_prio[stomp_type]); 221 const u32 *weight = ar9003_wlan_weights[stomp_type]; 222 int i; 223 224 if (!AR_SREV_9300_20_OR_LATER(ah)) { 225 btcoex_hw->bt_coex_weights = 226 SM(bt_weight, AR_BTCOEX_BT_WGHT) | 227 SM(wlan_weight, AR_BTCOEX_WL_WGHT); 228 return; 229 } 230 231 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) { 232 enum ath_stomp_type stype = 233 ((stomp_type == ATH_BTCOEX_STOMP_LOW) && 234 btcoex_hw->mci.stomp_ftp) ? 235 ATH_BTCOEX_STOMP_LOW_FTP : stomp_type; 236 weight = mci_wlan_weights[stype]; 237 } 238 239 for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) { 240 btcoex_hw->bt_weight[i] = AR9300_BT_WGHT; 241 btcoex_hw->wlan_weight[i] = weight[i]; 242 if (concur_tx && i) { 243 btcoex_hw->wlan_weight[i] &= 244 ~(0xff << txprio_shift[i-1]); 245 btcoex_hw->wlan_weight[i] |= 246 (btcoex_hw->tx_prio[stomp_type] << 247 txprio_shift[i-1]); 248 } 249 } 250 /* Last WLAN weight has to be adjusted wrt tx priority */ 251 if (concur_tx) { 252 btcoex_hw->wlan_weight[i-1] &= ~(0xff << txprio_shift[i-1]); 253 btcoex_hw->wlan_weight[i-1] |= (btcoex_hw->tx_prio[stomp_type] 254 << txprio_shift[i-1]); 255 } 256 257 } 258 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight); 259 260 261 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah) 262 { 263 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw; 264 u32 val; 265 int i; 266 267 /* 268 * Program coex mode and weight registers to 269 * enable coex 3-wire 270 */ 271 REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode); 272 REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2); 273 274 275 if (AR_SREV_9300_20_OR_LATER(ah)) { 276 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]); 277 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]); 278 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) 279 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 280 btcoex->bt_weight[i]); 281 } else 282 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights); 283 284 285 286 if (AR_SREV_9271(ah)) { 287 val = REG_READ(ah, 0x50040); 288 val &= 0xFFFFFEFF; 289 REG_WRITE(ah, 0x50040, val); 290 } 291 292 REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1); 293 REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0); 294 295 ath9k_hw_cfg_output(ah, btcoex->wlanactive_gpio, 296 AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL); 297 } 298 299 static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah) 300 { 301 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw; 302 int i; 303 304 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) 305 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i), 306 btcoex->wlan_weight[i]); 307 308 REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1); 309 btcoex->enabled = true; 310 } 311 312 static void ath9k_hw_btcoex_disable_mci(struct ath_hw *ah) 313 { 314 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 315 int i; 316 317 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); 318 319 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) 320 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i), 321 btcoex_hw->wlan_weight[i]); 322 } 323 324 void ath9k_hw_btcoex_enable(struct ath_hw *ah) 325 { 326 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 327 328 switch (ath9k_hw_get_btcoex_scheme(ah)) { 329 case ATH_BTCOEX_CFG_NONE: 330 return; 331 case ATH_BTCOEX_CFG_2WIRE: 332 ath9k_hw_btcoex_enable_2wire(ah); 333 break; 334 case ATH_BTCOEX_CFG_3WIRE: 335 ath9k_hw_btcoex_enable_3wire(ah); 336 break; 337 case ATH_BTCOEX_CFG_MCI: 338 ath9k_hw_btcoex_enable_mci(ah); 339 break; 340 } 341 342 if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI) { 343 REG_RMW(ah, AR_GPIO_PDPU, 344 (0x2 << (btcoex_hw->btactive_gpio * 2)), 345 (0x3 << (btcoex_hw->btactive_gpio * 2))); 346 } 347 348 ah->btcoex_hw.enabled = true; 349 } 350 EXPORT_SYMBOL(ath9k_hw_btcoex_enable); 351 352 void ath9k_hw_btcoex_disable(struct ath_hw *ah) 353 { 354 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 355 int i; 356 357 btcoex_hw->enabled = false; 358 359 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_MCI) { 360 ath9k_hw_btcoex_disable_mci(ah); 361 return; 362 } 363 364 if (!AR_SREV_9300_20_OR_LATER(ah)) 365 ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0); 366 367 ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio, 368 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 369 370 if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) { 371 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE); 372 REG_WRITE(ah, AR_BT_COEX_MODE2, 0); 373 374 if (AR_SREV_9300_20_OR_LATER(ah)) { 375 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0); 376 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0); 377 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) 378 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0); 379 } else 380 REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0); 381 382 } 383 } 384 EXPORT_SYMBOL(ath9k_hw_btcoex_disable); 385 386 /* 387 * Configures appropriate weight based on stomp type. 388 */ 389 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah, 390 enum ath_stomp_type stomp_type) 391 { 392 if (AR_SREV_9300_20_OR_LATER(ah)) { 393 ath9k_hw_btcoex_set_weight(ah, 0, 0, stomp_type); 394 return; 395 } 396 397 switch (stomp_type) { 398 case ATH_BTCOEX_STOMP_ALL: 399 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 400 AR_STOMP_ALL_WLAN_WGHT, 0); 401 break; 402 case ATH_BTCOEX_STOMP_LOW: 403 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 404 AR_STOMP_LOW_WLAN_WGHT, 0); 405 break; 406 case ATH_BTCOEX_STOMP_NONE: 407 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 408 AR_STOMP_NONE_WLAN_WGHT, 0); 409 break; 410 default: 411 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n"); 412 break; 413 } 414 } 415 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp); 416 417 void ath9k_hw_btcoex_set_concur_txprio(struct ath_hw *ah, u8 *stomp_txprio) 418 { 419 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw; 420 int i; 421 422 for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++) 423 btcoex->tx_prio[i] = stomp_txprio[i]; 424 } 425 EXPORT_SYMBOL(ath9k_hw_btcoex_set_concur_txprio); 426