From 500c064d3a5f9c8aa604ef63a1346ab70eed443a Mon Sep 17 00:00:00 2001 From: Vasanthakumar Thiagarajan Date: Wed, 10 Sep 2008 18:50:17 +0530 Subject: ath9k: Add RF kill support RF kill support is enabled when CONFIG_RFKILL is set. Signed-off-by: Vasanthakumar Thiagarajan Signed-off-by: John W. Linville --- drivers/net/wireless/ath9k/main.c | 266 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 266 insertions(+) (limited to 'drivers/net/wireless/ath9k/main.c') diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c index 07e5b5d877b..b493dff5643 100644 --- a/drivers/net/wireless/ath9k/main.c +++ b/drivers/net/wireless/ath9k/main.c @@ -672,6 +672,209 @@ fail: ath_deinit_leds(sc); } +#ifdef CONFIG_RFKILL +/*******************/ +/* Rfkill */ +/*******************/ + +static void ath_radio_enable(struct ath_softc *sc) +{ + struct ath_hal *ah = sc->sc_ah; + int status; + + spin_lock_bh(&sc->sc_resetlock); + if (!ath9k_hw_reset(ah, ah->ah_curchan, + sc->sc_ht_info.tx_chan_width, + sc->sc_tx_chainmask, + sc->sc_rx_chainmask, + sc->sc_ht_extprotspacing, + false, &status)) { + DPRINTF(sc, ATH_DBG_FATAL, + "%s: unable to reset channel %u (%uMhz) " + "flags 0x%x hal status %u\n", __func__, + ath9k_hw_mhz2ieee(ah, + ah->ah_curchan->channel, + ah->ah_curchan->channelFlags), + ah->ah_curchan->channel, + ah->ah_curchan->channelFlags, status); + } + spin_unlock_bh(&sc->sc_resetlock); + + ath_update_txpow(sc); + if (ath_startrecv(sc) != 0) { + DPRINTF(sc, ATH_DBG_FATAL, + "%s: unable to restart recv logic\n", __func__); + return; + } + + if (sc->sc_flags & SC_OP_BEACONS) + ath_beacon_config(sc, ATH_IF_ID_ANY); /* restart beacons */ + + /* Re-Enable interrupts */ + ath9k_hw_set_interrupts(ah, sc->sc_imask); + + /* Enable LED */ + ath9k_hw_cfg_output(ah, ATH_LED_PIN, + AR_GPIO_OUTPUT_MUX_AS_OUTPUT); + ath9k_hw_set_gpio(ah, ATH_LED_PIN, 0); + + ieee80211_wake_queues(sc->hw); +} + +static void ath_radio_disable(struct ath_softc *sc) +{ + struct ath_hal *ah = sc->sc_ah; + int status; + + + ieee80211_stop_queues(sc->hw); + + /* Disable LED */ + ath9k_hw_set_gpio(ah, ATH_LED_PIN, 1); + ath9k_hw_cfg_gpio_input(ah, ATH_LED_PIN); + + /* Disable interrupts */ + ath9k_hw_set_interrupts(ah, 0); + + ath_draintxq(sc, false); /* clear pending tx frames */ + ath_stoprecv(sc); /* turn off frame recv */ + ath_flushrecv(sc); /* flush recv queue */ + + spin_lock_bh(&sc->sc_resetlock); + if (!ath9k_hw_reset(ah, ah->ah_curchan, + sc->sc_ht_info.tx_chan_width, + sc->sc_tx_chainmask, + sc->sc_rx_chainmask, + sc->sc_ht_extprotspacing, + false, &status)) { + DPRINTF(sc, ATH_DBG_FATAL, + "%s: unable to reset channel %u (%uMhz) " + "flags 0x%x hal status %u\n", __func__, + ath9k_hw_mhz2ieee(ah, + ah->ah_curchan->channel, + ah->ah_curchan->channelFlags), + ah->ah_curchan->channel, + ah->ah_curchan->channelFlags, status); + } + spin_unlock_bh(&sc->sc_resetlock); + + ath9k_hw_phy_disable(ah); + ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP); +} + +static bool ath_is_rfkill_set(struct ath_softc *sc) +{ + struct ath_hal *ah = sc->sc_ah; + + return ath9k_hw_gpio_get(ah, ah->ah_rfkill_gpio) == + ah->ah_rfkill_polarity; +} + +/* h/w rfkill poll function */ +static void ath_rfkill_poll(struct work_struct *work) +{ + struct ath_softc *sc = container_of(work, struct ath_softc, + rf_kill.rfkill_poll.work); + bool radio_on; + + if (sc->sc_flags & SC_OP_INVALID) + return; + + radio_on = !ath_is_rfkill_set(sc); + + /* + * enable/disable radio only when there is a + * state change in RF switch + */ + if (radio_on == !!(sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED)) { + enum rfkill_state state; + + if (sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED) { + state = radio_on ? RFKILL_STATE_SOFT_BLOCKED + : RFKILL_STATE_HARD_BLOCKED; + } else if (radio_on) { + ath_radio_enable(sc); + state = RFKILL_STATE_UNBLOCKED; + } else { + ath_radio_disable(sc); + state = RFKILL_STATE_HARD_BLOCKED; + } + + if (state == RFKILL_STATE_HARD_BLOCKED) + sc->sc_flags |= SC_OP_RFKILL_HW_BLOCKED; + else + sc->sc_flags &= ~SC_OP_RFKILL_HW_BLOCKED; + + rfkill_force_state(sc->rf_kill.rfkill, state); + } + + queue_delayed_work(sc->hw->workqueue, &sc->rf_kill.rfkill_poll, + msecs_to_jiffies(ATH_RFKILL_POLL_INTERVAL)); +} + +/* s/w rfkill handler */ +static int ath_sw_toggle_radio(void *data, enum rfkill_state state) +{ + struct ath_softc *sc = data; + + switch (state) { + case RFKILL_STATE_SOFT_BLOCKED: + if (!(sc->sc_flags & (SC_OP_RFKILL_HW_BLOCKED | + SC_OP_RFKILL_SW_BLOCKED))) + ath_radio_disable(sc); + sc->sc_flags |= SC_OP_RFKILL_SW_BLOCKED; + return 0; + case RFKILL_STATE_UNBLOCKED: + if ((sc->sc_flags & SC_OP_RFKILL_SW_BLOCKED)) { + sc->sc_flags &= ~SC_OP_RFKILL_SW_BLOCKED; + if (sc->sc_flags & SC_OP_RFKILL_HW_BLOCKED) { + DPRINTF(sc, ATH_DBG_FATAL, "Can't turn on the" + "radio as it is disabled by h/w \n"); + return -EPERM; + } + ath_radio_enable(sc); + } + return 0; + default: + return -EINVAL; + } +} + +/* Init s/w rfkill */ +static int ath_init_sw_rfkill(struct ath_softc *sc) +{ + sc->rf_kill.rfkill = rfkill_allocate(wiphy_dev(sc->hw->wiphy), + RFKILL_TYPE_WLAN); + if (!sc->rf_kill.rfkill) { + DPRINTF(sc, ATH_DBG_FATAL, "Failed to allocate rfkill\n"); + return -ENOMEM; + } + + snprintf(sc->rf_kill.rfkill_name, sizeof(sc->rf_kill.rfkill_name), + "ath9k-%s:rfkill", wiphy_name(sc->hw->wiphy)); + sc->rf_kill.rfkill->name = sc->rf_kill.rfkill_name; + sc->rf_kill.rfkill->data = sc; + sc->rf_kill.rfkill->toggle_radio = ath_sw_toggle_radio; + sc->rf_kill.rfkill->state = RFKILL_STATE_UNBLOCKED; + sc->rf_kill.rfkill->user_claim_unsupported = 1; + + return 0; +} + +/* Deinitialize rfkill */ +static void ath_deinit_rfkill(struct ath_softc *sc) +{ + if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT) + cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll); + + if (sc->sc_flags & SC_OP_RFKILL_REGISTERED) { + rfkill_unregister(sc->rf_kill.rfkill); + sc->sc_flags &= ~SC_OP_RFKILL_REGISTERED; + sc->rf_kill.rfkill = NULL; + } +} +#endif /* CONFIG_RFKILL */ + static int ath_detach(struct ath_softc *sc) { struct ieee80211_hw *hw = sc->hw; @@ -681,6 +884,11 @@ static int ath_detach(struct ath_softc *sc) /* Deinit LED control */ ath_deinit_leds(sc); +#ifdef CONFIG_RFKILL + /* deinit rfkill */ + ath_deinit_rfkill(sc); +#endif + /* Unregister hw */ ieee80211_unregister_hw(hw); @@ -777,6 +985,16 @@ static int ath_attach(u16 devid, /* Initialize LED control */ ath_init_leds(sc); +#ifdef CONFIG_RFKILL + /* Initialze h/w Rfkill */ + if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT) + INIT_DELAYED_WORK(&sc->rf_kill.rfkill_poll, ath_rfkill_poll); + + /* Initialize s/w rfkill */ + if (ath_init_sw_rfkill(sc)) + goto detach; +#endif + /* initialize tx/rx engine */ error = ath_tx_init(sc, ATH_TXBUF); @@ -822,6 +1040,33 @@ static int ath9k_start(struct ieee80211_hw *hw) return error; } +#ifdef CONFIG_RFKILL + /* Start rfkill polling */ + if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT) + queue_delayed_work(sc->hw->workqueue, + &sc->rf_kill.rfkill_poll, 0); + + if (!(sc->sc_flags & SC_OP_RFKILL_REGISTERED)) { + if (rfkill_register(sc->rf_kill.rfkill)) { + DPRINTF(sc, ATH_DBG_FATAL, + "Unable to register rfkill\n"); + rfkill_free(sc->rf_kill.rfkill); + + /* Deinitialize the device */ + if (sc->pdev->irq) + free_irq(sc->pdev->irq, sc); + ath_detach(sc); + pci_iounmap(sc->pdev, sc->mem); + pci_release_region(sc->pdev, 0); + pci_disable_device(sc->pdev); + ieee80211_free_hw(hw); + return -EIO; + } else { + sc->sc_flags |= SC_OP_RFKILL_REGISTERED; + } + } +#endif + ieee80211_wake_queues(hw); return 0; } @@ -883,6 +1128,11 @@ static void ath9k_stop(struct ieee80211_hw *hw) "%s: Device is no longer present\n", __func__); ieee80211_stop_queues(hw); + +#ifdef CONFIG_RFKILL + if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT) + cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll); +#endif } static int ath9k_add_interface(struct ieee80211_hw *hw, @@ -1554,6 +1804,12 @@ static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state) struct ath_softc *sc = hw->priv; ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1); + +#ifdef CONFIG_RFKILL + if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT) + cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll); +#endif + pci_save_state(pdev); pci_disable_device(pdev); pci_set_power_state(pdev, 3); @@ -1586,6 +1842,16 @@ static int ath_pci_resume(struct pci_dev *pdev) AR_GPIO_OUTPUT_MUX_AS_OUTPUT); ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1); +#ifdef CONFIG_RFKILL + /* + * check the h/w rfkill state on resume + * and start the rfkill poll timer + */ + if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT) + queue_delayed_work(sc->hw->workqueue, + &sc->rf_kill.rfkill_poll, 0); +#endif + return 0; } -- cgit v1.2.3