drivers/net/wireless/ath/ath9k/gpio.c

   1 /*
   2  * Copyright (c) 2008-2011 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 "ath9k.h"
  18
  19 /********************************/
  20 /*       LED functions          */
  21 /********************************/
  22
  23 #ifdef CONFIG_MAC80211_LEDS
  24 static void ath_led_brightness(struct led_classdev *led_cdev,
  25                                enum led_brightness brightness)
  26 {
  27         struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev);
  28         ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, (brightness == LED_OFF));
  29 }
  30
  31 void ath_deinit_leds(struct ath_softc *sc)
  32 {
  33         if (!sc->led_registered)
  34                 return;
  35
  36         ath_led_brightness(&sc->led_cdev, LED_OFF);
  37         led_classdev_unregister(&sc->led_cdev);
  38 }
  39
  40 void ath_init_leds(struct ath_softc *sc)
  41 {
  42         int ret;
  43
  44         if (AR_SREV_9100(sc->sc_ah))
  45                 return;
  46
  47         if (!led_blink)
  48                 sc->led_cdev.default_trigger =
  49                         ieee80211_get_radio_led_name(sc->hw);
  50
  51         snprintf(sc->led_name, sizeof(sc->led_name),
  52                 "ath9k-%s", wiphy_name(sc->hw->wiphy));
  53         sc->led_cdev.name = sc->led_name;
  54         sc->led_cdev.brightness_set = ath_led_brightness;
  55
  56         ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
  57         if (ret < 0)
  58                 return;
  59
  60         sc->led_registered = true;
  61 }
  62
  63 void ath_fill_led_pin(struct ath_softc *sc)
  64 {
  65         struct ath_hw *ah = sc->sc_ah;
  66
  67         if (AR_SREV_9100(ah) || (ah->led_pin >= 0))
  68                 return;
  69
  70         if (AR_SREV_9287(ah))
  71                 ah->led_pin = ATH_LED_PIN_9287;
  72         else if (AR_SREV_9485(sc->sc_ah))
  73                 ah->led_pin = ATH_LED_PIN_9485;
  74         else if (AR_SREV_9300(sc->sc_ah))
  75                 ah->led_pin = ATH_LED_PIN_9300;
  76         else if (AR_SREV_9462(sc->sc_ah) || AR_SREV_9565(sc->sc_ah))
  77                 ah->led_pin = ATH_LED_PIN_9462;
  78         else
  79                 ah->led_pin = ATH_LED_PIN_DEF;
  80
  81         /* Configure gpio 1 for output */
  82         ath9k_hw_cfg_output(ah, ah->led_pin, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
  83
  84         /* LED off, active low */
  85         ath9k_hw_set_gpio(ah, ah->led_pin, 1);
  86 }
  87 #endif
  88
  89 /*******************/
  90 /*      Rfkill     */
  91 /*******************/
  92
  93 static bool ath_is_rfkill_set(struct ath_softc *sc)
  94 {
  95         struct ath_hw *ah = sc->sc_ah;
  96         bool is_blocked;
  97
  98         ath9k_ps_wakeup(sc);
  99         is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
 100                                   ah->rfkill_polarity;
 101         ath9k_ps_restore(sc);
 102
 103         return is_blocked;
 104 }
 105
 106 void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
 107 {
 108         struct ath_softc *sc = hw->priv;
 109         bool blocked = !!ath_is_rfkill_set(sc);
 110
 111         wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
 112 }
 113
 114 void ath_start_rfkill_poll(struct ath_softc *sc)
 115 {
 116         struct ath_hw *ah = sc->sc_ah;
 117
 118         if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
 119                 wiphy_rfkill_start_polling(sc->hw->wiphy);
 120 }
 121
 122 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
 123
 124 /******************/
 125 /*     BTCOEX     */
 126 /******************/
 127
 128 /*
 129  * Detects if there is any priority bt traffic
 130  */
 131 static void ath_detect_bt_priority(struct ath_softc *sc)
 132 {
 133         struct ath_btcoex *btcoex = &sc->btcoex;
 134         struct ath_hw *ah = sc->sc_ah;
 135
 136         if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio))
 137                 btcoex->bt_priority_cnt++;
 138
 139         if (time_after(jiffies, btcoex->bt_priority_time +
 140                         msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
 141                 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
 142                 clear_bit(BT_OP_SCAN, &btcoex->op_flags);
 143                 /* Detect if colocated bt started scanning */
 144                 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
 145                         ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
 146                                 "BT scan detected\n");
 147                         set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
 148                         set_bit(BT_OP_SCAN, &btcoex->op_flags);
 149                 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
 150                         ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
 151                                 "BT priority traffic detected\n");
 152                         set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
 153                 }
 154
 155                 btcoex->bt_priority_cnt = 0;
 156                 btcoex->bt_priority_time = jiffies;
 157         }
 158 }
 159
 160 static void ath_mci_ftp_adjust(struct ath_softc *sc)
 161 {
 162         struct ath_btcoex *btcoex = &sc->btcoex;
 163         struct ath_mci_profile *mci = &btcoex->mci;
 164         struct ath_hw *ah = sc->sc_ah;
 165
 166         if (btcoex->bt_wait_time > ATH_BTCOEX_RX_WAIT_TIME) {
 167                 if (ar9003_mci_state(ah, MCI_STATE_NEED_FTP_STOMP) &&
 168                     (mci->num_pan || mci->num_other_acl))
 169                         ah->btcoex_hw.mci.stomp_ftp =
 170                                 (sc->rx.num_pkts < ATH_BTCOEX_STOMP_FTP_THRESH);
 171                 else
 172                         ah->btcoex_hw.mci.stomp_ftp = false;
 173                 btcoex->bt_wait_time = 0;
 174                 sc->rx.num_pkts = 0;
 175         }
 176 }
 177
 178 /*
 179  * This is the master bt coex timer which runs for every
 180  * 45ms, bt traffic will be given priority during 55% of this
 181  * period while wlan gets remaining 45%
 182  */
 183 static void ath_btcoex_period_timer(unsigned long data)
 184 {
 185         struct ath_softc *sc = (struct ath_softc *) data;
 186         struct ath_hw *ah = sc->sc_ah;
 187         struct ath_btcoex *btcoex = &sc->btcoex;
 188         enum ath_stomp_type stomp_type;
 189         u32 timer_period;
 190         unsigned long flags;
 191
 192         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 193         if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) {
 194                 btcoex->bt_wait_time += btcoex->btcoex_period;
 195                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 196                 goto skip_hw_wakeup;
 197         }
 198         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 199
 200         ath9k_mci_update_rssi(sc);
 201
 202         ath9k_ps_wakeup(sc);
 203
 204         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
 205                 ath_detect_bt_priority(sc);
 206
 207         if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
 208                 ath_mci_ftp_adjust(sc);
 209
 210         spin_lock_bh(&btcoex->btcoex_lock);
 211
 212         stomp_type = btcoex->bt_stomp_type;
 213         timer_period = btcoex->btcoex_no_stomp;
 214
 215         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) {
 216                 if (test_bit(BT_OP_SCAN, &btcoex->op_flags)) {
 217                         stomp_type = ATH_BTCOEX_STOMP_ALL;
 218                         timer_period = btcoex->btscan_no_stomp;
 219                 }
 220         } else if (btcoex->stomp_audio >= 5) {
 221                 stomp_type = ATH_BTCOEX_STOMP_AUDIO;
 222                 btcoex->stomp_audio = 0;
 223         }
 224
 225         ath9k_hw_btcoex_bt_stomp(ah, stomp_type);
 226         ath9k_hw_btcoex_enable(ah);
 227
 228         spin_unlock_bh(&btcoex->btcoex_lock);
 229
 230         if (btcoex->btcoex_period != btcoex->btcoex_no_stomp)
 231                 mod_timer(&btcoex->no_stomp_timer,
 232                          jiffies + msecs_to_jiffies(timer_period));
 233
 234         ath9k_ps_restore(sc);
 235
 236 skip_hw_wakeup:
 237         mod_timer(&btcoex->period_timer,
 238                   jiffies + msecs_to_jiffies(btcoex->btcoex_period));
 239 }
 240
 241 /*
 242  * Generic tsf based hw timer which configures weight
 243  * registers to time slice between wlan and bt traffic
 244  */
 245 static void ath_btcoex_no_stomp_timer(unsigned long arg)
 246 {
 247         struct ath_softc *sc = (struct ath_softc *)arg;
 248         struct ath_hw *ah = sc->sc_ah;
 249         struct ath_btcoex *btcoex = &sc->btcoex;
 250         struct ath_common *common = ath9k_hw_common(ah);
 251
 252         ath_dbg(common, BTCOEX, "no stomp timer running\n");
 253
 254         ath9k_ps_wakeup(sc);
 255         spin_lock_bh(&btcoex->btcoex_lock);
 256
 257         if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW ||
 258             (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI) &&
 259              test_bit(BT_OP_SCAN, &btcoex->op_flags)))
 260                 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
 261         else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
 262                 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
 263
 264         ath9k_hw_btcoex_enable(ah);
 265         spin_unlock_bh(&btcoex->btcoex_lock);
 266         ath9k_ps_restore(sc);
 267 }
 268
 269 static int ath_init_btcoex_timer(struct ath_softc *sc)
 270 {
 271         struct ath_btcoex *btcoex = &sc->btcoex;
 272
 273         btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
 274         btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
 275                 btcoex->btcoex_period / 100;
 276         btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
 277                                    btcoex->btcoex_period / 100;
 278
 279         setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
 280                         (unsigned long) sc);
 281         setup_timer(&btcoex->no_stomp_timer, ath_btcoex_no_stomp_timer,
 282                         (unsigned long) sc);
 283
 284         spin_lock_init(&btcoex->btcoex_lock);
 285
 286         return 0;
 287 }
 288
 289 /*
 290  * (Re)start btcoex timers
 291  */
 292 void ath9k_btcoex_timer_resume(struct ath_softc *sc)
 293 {
 294         struct ath_btcoex *btcoex = &sc->btcoex;
 295         struct ath_hw *ah = sc->sc_ah;
 296
 297         ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n");
 298
 299         /* make sure duty cycle timer is also stopped when resuming */
 300         del_timer_sync(&btcoex->no_stomp_timer);
 301
 302         btcoex->bt_priority_cnt = 0;
 303         btcoex->bt_priority_time = jiffies;
 304         clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
 305         clear_bit(BT_OP_SCAN, &btcoex->op_flags);
 306
 307         mod_timer(&btcoex->period_timer, jiffies);
 308 }
 309
 310
 311 /*
 312  * Pause btcoex timer and bt duty cycle timer
 313  */
 314 void ath9k_btcoex_timer_pause(struct ath_softc *sc)
 315 {
 316         struct ath_btcoex *btcoex = &sc->btcoex;
 317
 318         del_timer_sync(&btcoex->period_timer);
 319         del_timer_sync(&btcoex->no_stomp_timer);
 320 }
 321
 322 void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc)
 323 {
 324         struct ath_btcoex *btcoex = &sc->btcoex;
 325
 326         del_timer_sync(&btcoex->no_stomp_timer);
 327 }
 328
 329 u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen)
 330 {
 331         struct ath_btcoex *btcoex = &sc->btcoex;
 332         struct ath_mci_profile *mci = &sc->btcoex.mci;
 333         u16 aggr_limit = 0;
 334
 335         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit)
 336                 aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4;
 337         else if (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags))
 338                 aggr_limit = min((max_4ms_framelen * 3) / 8,
 339                                  (u32)ATH_AMPDU_LIMIT_MAX);
 340
 341         return aggr_limit;
 342 }
 343
 344 void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status)
 345 {
 346         if (status & ATH9K_INT_MCI)
 347                 ath_mci_intr(sc);
 348 }
 349
 350 void ath9k_start_btcoex(struct ath_softc *sc)
 351 {
 352         struct ath_hw *ah = sc->sc_ah;
 353
 354         if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
 355             !ah->btcoex_hw.enabled) {
 356                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
 357                         ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 358                                                    AR_STOMP_LOW_WLAN_WGHT, 0);
 359                 else
 360                         ath9k_hw_btcoex_set_weight(ah, 0, 0,
 361                                                    ATH_BTCOEX_STOMP_NONE);
 362                 ath9k_hw_btcoex_enable(ah);
 363
 364                 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
 365                         ath9k_btcoex_timer_resume(sc);
 366         }
 367 }
 368
 369 void ath9k_stop_btcoex(struct ath_softc *sc)
 370 {
 371         struct ath_hw *ah = sc->sc_ah;
 372
 373         if (ah->btcoex_hw.enabled &&
 374             ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
 375                 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
 376                         ath9k_btcoex_timer_pause(sc);
 377                 ath9k_hw_btcoex_disable(ah);
 378                 if (AR_SREV_9462(ah) || AR_SREV_9565(ah))
 379                         ath_mci_flush_profile(&sc->btcoex.mci);
 380         }
 381 }
 382
 383 void ath9k_deinit_btcoex(struct ath_softc *sc)
 384 {
 385         struct ath_hw *ah = sc->sc_ah;
 386
 387         if (ath9k_hw_mci_is_enabled(ah))
 388                 ath_mci_cleanup(sc);
 389 }
 390
 391 int ath9k_init_btcoex(struct ath_softc *sc)
 392 {
 393         struct ath_txq *txq;
 394         struct ath_hw *ah = sc->sc_ah;
 395         int r;
 396
 397         ath9k_hw_btcoex_init_scheme(ah);
 398
 399         switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) {
 400         case ATH_BTCOEX_CFG_NONE:
 401                 break;
 402         case ATH_BTCOEX_CFG_2WIRE:
 403                 ath9k_hw_btcoex_init_2wire(sc->sc_ah);
 404                 break;
 405         case ATH_BTCOEX_CFG_3WIRE:
 406                 ath9k_hw_btcoex_init_3wire(sc->sc_ah);
 407                 r = ath_init_btcoex_timer(sc);
 408                 if (r)
 409                         return -1;
 410                 txq = sc->tx.txq_map[IEEE80211_AC_BE];
 411                 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum);
 412                 sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
 413                 if (ath9k_hw_mci_is_enabled(ah)) {
 414                         sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
 415                         INIT_LIST_HEAD(&sc->btcoex.mci.info);
 416
 417                         r = ath_mci_setup(sc);
 418                         if (r)
 419                                 return r;
 420
 421                         ath9k_hw_btcoex_init_mci(ah);
 422                 }
 423
 424                 break;
 425         default:
 426                 WARN_ON(1);
 427                 break;
 428         }
 429
 430         return 0;
 431 }
 432
 433 static int ath9k_dump_mci_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
 434 {
 435         struct ath_btcoex *btcoex = &sc->btcoex;
 436         struct ath_mci_profile *mci = &btcoex->mci;
 437         struct ath_hw *ah = sc->sc_ah;
 438         struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 439         u32 len = 0;
 440         int i;
 441
 442         ATH_DUMP_BTCOEX("Total BT profiles", NUM_PROF(mci));
 443         ATH_DUMP_BTCOEX("MGMT", mci->num_mgmt);
 444         ATH_DUMP_BTCOEX("SCO", mci->num_sco);
 445         ATH_DUMP_BTCOEX("A2DP", mci->num_a2dp);
 446         ATH_DUMP_BTCOEX("HID", mci->num_hid);
 447         ATH_DUMP_BTCOEX("PAN", mci->num_pan);
 448         ATH_DUMP_BTCOEX("ACL", mci->num_other_acl);
 449         ATH_DUMP_BTCOEX("BDR", mci->num_bdr);
 450         ATH_DUMP_BTCOEX("Aggr. Limit", mci->aggr_limit);
 451         ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type);
 452         ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period);
 453         ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle);
 454         ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time);
 455         ATH_DUMP_BTCOEX("Concurrent Tx", btcoex_hw->mci.concur_tx);
 456         ATH_DUMP_BTCOEX("Concurrent RSSI cnt", btcoex->rssi_count);
 457
 458         len += scnprintf(buf + len, size - len, "BT Weights: ");
 459         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 460                 len += scnprintf(buf + len, size - len, "%08x ",
 461                                  btcoex_hw->bt_weight[i]);
 462         len += scnprintf(buf + len, size - len, "\n");
 463         len += scnprintf(buf + len, size - len, "WLAN Weights: ");
 464         for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
 465                 len += scnprintf(buf + len, size - len, "%08x ",
 466                                  btcoex_hw->wlan_weight[i]);
 467         len += scnprintf(buf + len, size - len, "\n");
 468         len += scnprintf(buf + len, size - len, "Tx Priorities: ");
 469         for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)
 470                 len += scnprintf(buf + len, size - len, "%08x ",
 471                                 btcoex_hw->tx_prio[i]);
 472
 473         len += scnprintf(buf + len, size - len, "\n");
 474
 475         return len;
 476 }
 477
 478 static int ath9k_dump_legacy_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
 479 {
 480
 481         struct ath_btcoex *btcoex = &sc->btcoex;
 482         u32 len = 0;
 483
 484         ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type);
 485         ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period);
 486         ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle);
 487         ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time);
 488
 489         return len;
 490 }
 491
 492 int ath9k_dump_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
 493 {
 494         if (ath9k_hw_mci_is_enabled(sc->sc_ah))
 495                 return ath9k_dump_mci_btcoex(sc, buf, size);
 496         else
 497                 return ath9k_dump_legacy_btcoex(sc, buf, size);
 498 }
 499
 500 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */