1 /*
2 * RFKILL support for ath5k
3 *
4 * Copyright (c) 2009 Tobias Doerffel <tobias.doerffel@gmail.com>
5 * Lightly modified for gPXE, Sep 2008 by Joshua Oreman <oremanj@rwcr.net>
6 *
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer,
14 * without modification.
15 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
16 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
17 * redistribution must be conditioned upon including a substantially
18 * similar Disclaimer requirement for further binary redistribution.
19 * 3. Neither the names of the above-listed copyright holders nor the names
20 * of any contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * NO WARRANTY
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
27 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
28 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
29 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
32 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
34 * THE POSSIBILITY OF SUCH DAMAGES.
35 */
36
37 FILE_LICENCE ( MIT );
38
39 #include "base.h"
40
41
ath5k_rfkill_disable(struct ath5k_softc * sc)42 static inline void ath5k_rfkill_disable(struct ath5k_softc *sc)
43 {
44 DBG("ath5k: rfkill disable (gpio:%d polarity:%d)\n",
45 sc->rf_kill.gpio, sc->rf_kill.polarity);
46 ath5k_hw_set_gpio_output(sc->ah, sc->rf_kill.gpio);
47 ath5k_hw_set_gpio(sc->ah, sc->rf_kill.gpio, !sc->rf_kill.polarity);
48 }
49
50
ath5k_rfkill_enable(struct ath5k_softc * sc)51 static inline void ath5k_rfkill_enable(struct ath5k_softc *sc)
52 {
53 DBG("ath5k: rfkill enable (gpio:%d polarity:%d)\n",
54 sc->rf_kill.gpio, sc->rf_kill.polarity);
55 ath5k_hw_set_gpio_output(sc->ah, sc->rf_kill.gpio);
56 ath5k_hw_set_gpio(sc->ah, sc->rf_kill.gpio, sc->rf_kill.polarity);
57 }
58
ath5k_rfkill_set_intr(struct ath5k_softc * sc,int enable)59 static inline void ath5k_rfkill_set_intr(struct ath5k_softc *sc, int enable)
60 {
61 struct ath5k_hw *ah = sc->ah;
62 u32 curval;
63
64 ath5k_hw_set_gpio_input(ah, sc->rf_kill.gpio);
65 curval = ath5k_hw_get_gpio(ah, sc->rf_kill.gpio);
66 ath5k_hw_set_gpio_intr(ah, sc->rf_kill.gpio, enable ?
67 !!curval : !curval);
68 }
69
70 static int __unused
ath5k_is_rfkill_set(struct ath5k_softc * sc)71 ath5k_is_rfkill_set(struct ath5k_softc *sc)
72 {
73 /* configuring GPIO for input for some reason disables rfkill */
74 /*ath5k_hw_set_gpio_input(sc->ah, sc->rf_kill.gpio);*/
75 return (ath5k_hw_get_gpio(sc->ah, sc->rf_kill.gpio) ==
76 sc->rf_kill.polarity);
77 }
78
79 void
ath5k_rfkill_hw_start(struct ath5k_hw * ah)80 ath5k_rfkill_hw_start(struct ath5k_hw *ah)
81 {
82 struct ath5k_softc *sc = ah->ah_sc;
83
84 /* read rfkill GPIO configuration from EEPROM header */
85 sc->rf_kill.gpio = ah->ah_capabilities.cap_eeprom.ee_rfkill_pin;
86 sc->rf_kill.polarity = ah->ah_capabilities.cap_eeprom.ee_rfkill_pol;
87
88 ath5k_rfkill_disable(sc);
89
90 /* enable interrupt for rfkill switch */
91 if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header))
92 ath5k_rfkill_set_intr(sc, 1);
93 }
94
95
96 void
ath5k_rfkill_hw_stop(struct ath5k_hw * ah)97 ath5k_rfkill_hw_stop(struct ath5k_hw *ah)
98 {
99 struct ath5k_softc *sc = ah->ah_sc;
100
101 /* disable interrupt for rfkill switch */
102 if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header))
103 ath5k_rfkill_set_intr(sc, 0);
104
105 /* enable RFKILL when stopping HW so Wifi LED is turned off */
106 ath5k_rfkill_enable(sc);
107 }
108