iPXE
ath5k_rfkill.c
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1 /*
2  * RFKILL support for ath5k
3  *
4  * Copyright (c) 2009 Tobias Doerffel <tobias.doerffel@gmail.com>
5  * Lightly modified for iPXE, 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 
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);
48 }
49 
50 
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);
57 }
58 
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 
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
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
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 
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
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 */
107 }
void ath5k_rfkill_hw_stop(struct ath5k_hw *ah)
Definition: ath5k_rfkill.c:97
int ath5k_hw_set_gpio_output(struct ath5k_hw *ah, u32 gpio)
Definition: ath5k_gpio.c:49
struct ath5k_softc::@14 rf_kill
void ath5k_rfkill_hw_start(struct ath5k_hw *ah)
Definition: ath5k_rfkill.c:80
static void ath5k_rfkill_disable(struct ath5k_softc *sc)
Definition: ath5k_rfkill.c:42
void ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio, u32 interrupt_level)
Definition: ath5k_gpio.c:98
ath5k_hw_get_isr - Get interrupt status
Definition: ath5k.h:953
FILE_LICENCE(MIT)
int ath5k_hw_set_gpio_input(struct ath5k_hw *ah, u32 gpio)
Definition: ath5k_gpio.c:34
unsigned polarity
Definition: base.h:128
#define __unused
Declare a variable or data structure as unused.
Definition: compiler.h:573
#define AR5K_EEPROM_HDR_RFKILL(_v)
Definition: eeprom.h:73
int ath5k_hw_set_gpio(struct ath5k_hw *ah, u32 gpio, u32 val)
Definition: ath5k_gpio.c:77
static void ath5k_rfkill_set_intr(struct ath5k_softc *sc, int enable)
Definition: ath5k_rfkill.c:59
static void ath5k_rfkill_enable(struct ath5k_softc *sc)
Definition: ath5k_rfkill.c:51
uint8_t ah
Definition: registers.h:85
#define DBG(...)
Print a debugging message.
Definition: compiler.h:498
struct ath5k_hw * ah
Definition: base.h:92
u32 ath5k_hw_get_gpio(struct ath5k_hw *ah, u32 gpio)
Definition: ath5k_gpio.c:64
uint32_t u32
Definition: stdint.h:23
u16 gpio
Definition: base.h:127
static int __unused ath5k_is_rfkill_set(struct ath5k_softc *sc)
Definition: ath5k_rfkill.c:71