ath/ath5k/gpio.c

2  * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
3  * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
20   GPIO Functions
29  * DOC: GPIO/LED functions
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
39  * GPIO pins, we handle them through the LED subsystem on led.c
44  * ath5k_hw_set_ledstate() - Set led state
50  * not the GPIO based.
60 	if (ah->ah_version != AR5K_AR5210)  in ath5k_hw_set_ledstate()
94 	if (ah->ah_version != AR5K_AR5210)  in ath5k_hw_set_ledstate()
101  * ath5k_hw_set_gpio_input() - Set GPIO inputs
103  * @gpio: GPIO pin to set as input
106 ath5k_hw_set_gpio_input(struct ath5k_hw *ah, u32 gpio)  in ath5k_hw_set_gpio_input()  argument
108 	if (gpio >= AR5K_NUM_GPIO)  in ath5k_hw_set_gpio_input()
109 		return -EINVAL;  in ath5k_hw_set_gpio_input()
112 		(ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))  in ath5k_hw_set_gpio_input()
113 		| AR5K_GPIOCR_IN(gpio), AR5K_GPIOCR);  in ath5k_hw_set_gpio_input()
119  * ath5k_hw_set_gpio_output() - Set GPIO outputs
121  * @gpio: The GPIO pin to set as output
124 ath5k_hw_set_gpio_output(struct ath5k_hw *ah, u32 gpio)  in ath5k_hw_set_gpio_output()  argument
126 	if (gpio >= AR5K_NUM_GPIO)  in ath5k_hw_set_gpio_output()
127 		return -EINVAL;  in ath5k_hw_set_gpio_output()
130 		(ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))  in ath5k_hw_set_gpio_output()
131 		| AR5K_GPIOCR_OUT(gpio), AR5K_GPIOCR);  in ath5k_hw_set_gpio_output()
137  * ath5k_hw_get_gpio() - Get GPIO state
139  * @gpio: The GPIO pin to read
142 ath5k_hw_get_gpio(struct ath5k_hw *ah, u32 gpio)  in ath5k_hw_get_gpio()  argument
144 	if (gpio >= AR5K_NUM_GPIO)  in ath5k_hw_get_gpio()
147 	/* GPIO input magic */  in ath5k_hw_get_gpio()
148 	return ((ath5k_hw_reg_read(ah, AR5K_GPIODI) & AR5K_GPIODI_M) >> gpio) &  in ath5k_hw_get_gpio()
153  * ath5k_hw_set_gpio() - Set GPIO state
155  * @gpio: The GPIO pin to set
159 ath5k_hw_set_gpio(struct ath5k_hw *ah, u32 gpio, u32 val)  in ath5k_hw_set_gpio()  argument
163 	if (gpio >= AR5K_NUM_GPIO)  in ath5k_hw_set_gpio()
164 		return -EINVAL;  in ath5k_hw_set_gpio()
166 	/* GPIO output magic */  in ath5k_hw_set_gpio()
169 	data &= ~(1 << gpio);  in ath5k_hw_set_gpio()
170 	data |= (val & 1) << gpio;  in ath5k_hw_set_gpio()
178  * ath5k_hw_set_gpio_intr() - Initialize the GPIO interrupt (RFKill switch)
180  * @gpio: The GPIO pin to use
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.
189 ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio,  in ath5k_hw_set_gpio_intr()  argument
194 	if (gpio >= AR5K_NUM_GPIO)  in ath5k_hw_set_gpio_intr()
198 	 * Set the GPIO interrupt  in ath5k_hw_set_gpio_intr()
201 		~(AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_SELH |  in ath5k_hw_set_gpio_intr()
202 		AR5K_GPIOCR_INT_ENA | AR5K_GPIOCR_OUT(gpio))) |  in ath5k_hw_set_gpio_intr()
203 		(AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_ENA);  in ath5k_hw_set_gpio_intr()
208 	ah->ah_imr |= AR5K_IMR_GPIO;  in ath5k_hw_set_gpio_intr()
210 	/* Enable GPIO interrupts */  in ath5k_hw_set_gpio_intr()