1 files changed, 121 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath5k/rfkill.c b/drivers/net/wireless/ath/ath5k/rfkill.c
new file mode 100644
index 000000000000..41a877b73fce
--- /dev/null
+++ b/drivers/net/wireless/ath/ath5k/rfkill.c
@@ -0,0 +1,121 @@
+/*
+ * RFKILL support for ath5k
+ *
+ * Copyright (c) 2009 Tobias Doerffel <tobias.doerffel@gmail.com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *    redistribution must be conditioned upon including a substantially
+ *    similar Disclaimer requirement for further binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include "base.h"
+
+
+static inline void ath5k_rfkill_disable(struct ath5k_softc *sc)
+{
+        ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "rfkill disable (gpio:%d polarity:%d)\n",
+                sc->rf_kill.gpio, sc->rf_kill.polarity);
+        ath5k_hw_set_gpio_output(sc->ah, sc->rf_kill.gpio);
+        ath5k_hw_set_gpio(sc->ah, sc->rf_kill.gpio, !sc->rf_kill.polarity);
+}
+
+
+static inline void ath5k_rfkill_enable(struct ath5k_softc *sc)
+{
+        ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "rfkill enable (gpio:%d polarity:%d)\n",
+                sc->rf_kill.gpio, sc->rf_kill.polarity);
+        ath5k_hw_set_gpio_output(sc->ah, sc->rf_kill.gpio);
+        ath5k_hw_set_gpio(sc->ah, sc->rf_kill.gpio, sc->rf_kill.polarity);
+}
+
+static inline void ath5k_rfkill_set_intr(struct ath5k_softc *sc, bool enable)
+{
+        struct ath5k_hw *ah = sc->ah;
+        u32 curval;
+
+        ath5k_hw_set_gpio_input(ah, sc->rf_kill.gpio);
+        curval = ath5k_hw_get_gpio(ah, sc->rf_kill.gpio);
+        ath5k_hw_set_gpio_intr(ah, sc->rf_kill.gpio, enable ?
+                                        !!curval : !curval);
+}
+
+static bool
+ath5k_is_rfkill_set(struct ath5k_softc *sc)
+{
+        /* configuring GPIO for input for some reason disables rfkill */
+        /*ath5k_hw_set_gpio_input(sc->ah, sc->rf_kill.gpio);*/
+        return ath5k_hw_get_gpio(sc->ah, sc->rf_kill.gpio) ==
+                                                        sc->rf_kill.polarity;
+}
+
+static void
+ath5k_tasklet_rfkill_toggle(unsigned long data)
+{
+        struct ath5k_softc *sc = (void *)data;
+        bool blocked;
+
+        blocked = ath5k_is_rfkill_set(sc);
+        wiphy_rfkill_set_hw_state(sc->hw->wiphy, blocked);
+}
+
+
+void
+ath5k_rfkill_hw_start(struct ath5k_hw *ah)
+{
+        struct ath5k_softc *sc = ah->ah_sc;
+
+        /* read rfkill GPIO configuration from EEPROM header */
+        sc->rf_kill.gpio = ah->ah_capabilities.cap_eeprom.ee_rfkill_pin;
+        sc->rf_kill.polarity = ah->ah_capabilities.cap_eeprom.ee_rfkill_pol;
+
+        tasklet_init(&sc->rf_kill.toggleq, ath5k_tasklet_rfkill_toggle,
+                (unsigned long)sc);
+
+        ath5k_rfkill_disable(sc);
+
+        /* enable interrupt for rfkill switch */
+        if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header))
+                ath5k_rfkill_set_intr(sc, true);
+}
+
+
+void
+ath5k_rfkill_hw_stop(struct ath5k_hw *ah)
+{
+        struct ath5k_softc *sc = ah->ah_sc;
+
+        /* disable interrupt for rfkill switch */
+        if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header))
+                ath5k_rfkill_set_intr(sc, false);
+
+        tasklet_kill(&sc->rf_kill.toggleq);
+
+        /* enable RFKILL when stopping HW so Wifi LED is turned off */
+        ath5k_rfkill_enable(sc);
+}
+