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- /*
- * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
- * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
- *
- * Lightly modified for gPXE, July 2009, by Joshua Oreman <oremanj@rwcr.net>.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
- FILE_LICENCE ( MIT );
-
- /****************\
- GPIO Functions
- \****************/
-
- #include "ath5k.h"
- #include "reg.h"
- #include "base.h"
-
- /*
- * Set GPIO inputs
- */
- int ath5k_hw_set_gpio_input(struct ath5k_hw *ah, u32 gpio)
- {
- if (gpio >= AR5K_NUM_GPIO)
- return -EINVAL;
-
- ath5k_hw_reg_write(ah,
- (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))
- | AR5K_GPIOCR_IN(gpio), AR5K_GPIOCR);
-
- return 0;
- }
-
- /*
- * Set GPIO outputs
- */
- int ath5k_hw_set_gpio_output(struct ath5k_hw *ah, u32 gpio)
- {
- if (gpio >= AR5K_NUM_GPIO)
- return -EINVAL;
-
- ath5k_hw_reg_write(ah,
- (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))
- | AR5K_GPIOCR_OUT(gpio), AR5K_GPIOCR);
-
- return 0;
- }
-
- /*
- * Get GPIO state
- */
- u32 ath5k_hw_get_gpio(struct ath5k_hw *ah, u32 gpio)
- {
- if (gpio >= AR5K_NUM_GPIO)
- return 0xffffffff;
-
- /* GPIO input magic */
- return ((ath5k_hw_reg_read(ah, AR5K_GPIODI) & AR5K_GPIODI_M) >> gpio) &
- 0x1;
- }
-
- /*
- * Set GPIO state
- */
- int ath5k_hw_set_gpio(struct ath5k_hw *ah, u32 gpio, u32 val)
- {
- u32 data;
-
- if (gpio >= AR5K_NUM_GPIO)
- return -EINVAL;
-
- /* GPIO output magic */
- data = ath5k_hw_reg_read(ah, AR5K_GPIODO);
-
- data &= ~(1 << gpio);
- data |= (val & 1) << gpio;
-
- ath5k_hw_reg_write(ah, data, AR5K_GPIODO);
-
- return 0;
- }
-
- /*
- * Initialize the GPIO interrupt (RFKill switch)
- */
- void ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio,
- u32 interrupt_level)
- {
- u32 data;
-
- if (gpio >= AR5K_NUM_GPIO)
- return;
-
- /*
- * Set the GPIO interrupt
- */
- data = (ath5k_hw_reg_read(ah, AR5K_GPIOCR) &
- ~(AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_SELH |
- AR5K_GPIOCR_INT_ENA | AR5K_GPIOCR_OUT(gpio))) |
- (AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_ENA);
-
- ath5k_hw_reg_write(ah, interrupt_level ? data :
- (data | AR5K_GPIOCR_INT_SELH), AR5K_GPIOCR);
-
- ah->ah_imr |= AR5K_IMR_GPIO;
-
- /* Enable GPIO interrupts */
- AR5K_REG_ENABLE_BITS(ah, AR5K_PIMR, AR5K_IMR_GPIO);
- }
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