gpio.c (d4bbf7e7759afc172e2bfbc5c416324590049cdd) gpio.c (c47faa364cfb249d5d7670fb7293a6f9acd8aa9e)
1/*
2 * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
3 * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *

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19/****************\
20 GPIO Functions
21\****************/
22
23#include "ath5k.h"
24#include "reg.h"
25#include "debug.h"
26
1/*
2 * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
3 * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *

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19/****************\
20 GPIO Functions
21\****************/
22
23#include "ath5k.h"
24#include "reg.h"
25#include "debug.h"
26
27/*
28 * Set led state
27
28/**
29 * DOC: GPIO/LED functions
30 *
31 * Here we control the 6 bidirectional GPIO pins provided by the hw.
32 * We can set a GPIO pin to be an input or an output pin on GPIO control
33 * register and then read or set its status from GPIO data input/output
34 * registers.
35 *
36 * We also control the two LED pins provided by the hw, LED_0 is our
37 * "power" LED and LED_1 is our "network activity" LED but many scenarios
38 * are available from hw. Vendors might also provide LEDs connected to the
39 * GPIO pins, we handle them through the LED subsystem on led.c
29 */
40 */
30void ath5k_hw_set_ledstate(struct ath5k_hw *ah, unsigned int state)
41
42
43/**
44 * ath5k_hw_set_ledstate() - Set led state
45 * @ah: The &struct ath5k_hw
46 * @state: One of AR5K_LED_*
47 *
48 * Used to set the LED blinking state. This only
49 * works for the LED connected to the LED_0, LED_1 pins,
50 * not the GPIO based.
51 */
52void
53ath5k_hw_set_ledstate(struct ath5k_hw *ah, unsigned int state)
31{
32 u32 led;
33 /*5210 has different led mode handling*/
34 u32 led_5210;
35
36 /*Reset led status*/
37 if (ah->ah_version != AR5K_AR5210)
38 AR5K_REG_DISABLE_BITS(ah, AR5K_PCICFG,

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69
70 /*Write new status to the register*/
71 if (ah->ah_version != AR5K_AR5210)
72 AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, led);
73 else
74 AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, led_5210);
75}
76
54{
55 u32 led;
56 /*5210 has different led mode handling*/
57 u32 led_5210;
58
59 /*Reset led status*/
60 if (ah->ah_version != AR5K_AR5210)
61 AR5K_REG_DISABLE_BITS(ah, AR5K_PCICFG,

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92
93 /*Write new status to the register*/
94 if (ah->ah_version != AR5K_AR5210)
95 AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, led);
96 else
97 AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, led_5210);
98}
99
77/*
78 * Set GPIO inputs
100/**
101 * ath5k_hw_set_gpio_input() - Set GPIO inputs
102 * @ah: The &struct ath5k_hw
103 * @gpio: GPIO pin to set as input
79 */
104 */
80int ath5k_hw_set_gpio_input(struct ath5k_hw *ah, u32 gpio)
105int
106ath5k_hw_set_gpio_input(struct ath5k_hw *ah, u32 gpio)
81{
82 if (gpio >= AR5K_NUM_GPIO)
83 return -EINVAL;
84
85 ath5k_hw_reg_write(ah,
86 (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))
87 | AR5K_GPIOCR_IN(gpio), AR5K_GPIOCR);
88
89 return 0;
90}
91
107{
108 if (gpio >= AR5K_NUM_GPIO)
109 return -EINVAL;
110
111 ath5k_hw_reg_write(ah,
112 (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))
113 | AR5K_GPIOCR_IN(gpio), AR5K_GPIOCR);
114
115 return 0;
116}
117
92/*
93 * Set GPIO outputs
118/**
119 * ath5k_hw_set_gpio_output() - Set GPIO outputs
120 * @ah: The &struct ath5k_hw
121 * @gpio: The GPIO pin to set as output
94 */
122 */
95int ath5k_hw_set_gpio_output(struct ath5k_hw *ah, u32 gpio)
123int
124ath5k_hw_set_gpio_output(struct ath5k_hw *ah, u32 gpio)
96{
97 if (gpio >= AR5K_NUM_GPIO)
98 return -EINVAL;
99
100 ath5k_hw_reg_write(ah,
101 (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))
102 | AR5K_GPIOCR_OUT(gpio), AR5K_GPIOCR);
103
104 return 0;
105}
106
125{
126 if (gpio >= AR5K_NUM_GPIO)
127 return -EINVAL;
128
129 ath5k_hw_reg_write(ah,
130 (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))
131 | AR5K_GPIOCR_OUT(gpio), AR5K_GPIOCR);
132
133 return 0;
134}
135
107/*
108 * Get GPIO state
136/**
137 * ath5k_hw_get_gpio() - Get GPIO state
138 * @ah: The &struct ath5k_hw
139 * @gpio: The GPIO pin to read
109 */
140 */
110u32 ath5k_hw_get_gpio(struct ath5k_hw *ah, u32 gpio)
141u32
142ath5k_hw_get_gpio(struct ath5k_hw *ah, u32 gpio)
111{
112 if (gpio >= AR5K_NUM_GPIO)
113 return 0xffffffff;
114
115 /* GPIO input magic */
116 return ((ath5k_hw_reg_read(ah, AR5K_GPIODI) & AR5K_GPIODI_M) >> gpio) &
117 0x1;
118}
119
143{
144 if (gpio >= AR5K_NUM_GPIO)
145 return 0xffffffff;
146
147 /* GPIO input magic */
148 return ((ath5k_hw_reg_read(ah, AR5K_GPIODI) & AR5K_GPIODI_M) >> gpio) &
149 0x1;
150}
151
120/*
121 * Set GPIO state
152/**
153 * ath5k_hw_set_gpio() - Set GPIO state
154 * @ah: The &struct ath5k_hw
155 * @gpio: The GPIO pin to set
156 * @val: Value to set (boolean)
122 */
157 */
123int ath5k_hw_set_gpio(struct ath5k_hw *ah, u32 gpio, u32 val)
158int
159ath5k_hw_set_gpio(struct ath5k_hw *ah, u32 gpio, u32 val)
124{
125 u32 data;
126
127 if (gpio >= AR5K_NUM_GPIO)
128 return -EINVAL;
129
130 /* GPIO output magic */
131 data = ath5k_hw_reg_read(ah, AR5K_GPIODO);
132
133 data &= ~(1 << gpio);
134 data |= (val & 1) << gpio;
135
136 ath5k_hw_reg_write(ah, data, AR5K_GPIODO);
137
138 return 0;
139}
140
160{
161 u32 data;
162
163 if (gpio >= AR5K_NUM_GPIO)
164 return -EINVAL;
165
166 /* GPIO output magic */
167 data = ath5k_hw_reg_read(ah, AR5K_GPIODO);
168
169 data &= ~(1 << gpio);
170 data |= (val & 1) << gpio;
171
172 ath5k_hw_reg_write(ah, data, AR5K_GPIODO);
173
174 return 0;
175}
176
141/*
142 * Initialize the GPIO interrupt (RFKill switch)
177/**
178 * ath5k_hw_set_gpio_intr() - Initialize the GPIO interrupt (RFKill switch)
179 * @ah: The &struct ath5k_hw
180 * @gpio: The GPIO pin to use
181 * @interrupt_level: True to generate interrupt on active pin (high)
182 *
183 * This function is used to set up the GPIO interrupt for the hw RFKill switch.
184 * That switch is connected to a GPIO pin and it's number is stored on EEPROM.
185 * It can either open or close the circuit to indicate that we should disable
186 * RF/Wireless to save power (we also get that from EEPROM).
143 */
187 */
144void ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio,
188void
189ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio,
145 u32 interrupt_level)
146{
147 u32 data;
148
149 if (gpio >= AR5K_NUM_GPIO)
150 return;
151
152 /*

--- 16 unchanged lines hidden --- 		190 u32 interrupt_level)
191{
192 u32 data;
193
194 if (gpio >= AR5K_NUM_GPIO)
195 return;
196
197 /*

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