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ar5416_gpio.c revision 1.1.1.1.2.2 
      1 /*
      2  * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
      3  * Copyright (c) 2002-2008 Atheros Communications, Inc.
      4  *
      5  * Permission to use, copy, modify, and/or 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  *
      9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     16  *
     17  * $Id: ar5416_gpio.c,v 1.1.1.1.2.2 2009/01/17 13:29:15 mjf Exp $
     18  */
     19 #include "opt_ah.h"
     20 
     21 #include "ah.h"
     22 #include "ah_internal.h"
     23 #include "ah_devid.h"
     24 #ifdef AH_DEBUG
     25 #include "ah_desc.h"			/* NB: for HAL_PHYERR* */
     26 #endif
     27 
     28 #include "ar5416/ar5416.h"
     29 #include "ar5416/ar5416reg.h"
     30 #include "ar5416/ar5416phy.h"
     31 
     32 #define	AR_NUM_GPIO	6		/* 6 GPIO pins */
     33 #define AR_GPIO_BIT(_gpio)	(1 << _gpio)
     34 
     35 /*
     36  * Configure GPIO Output lines
     37  */
     38 HAL_BOOL
     39 ar5416GpioCfgOutput(struct ath_hal *ah, uint32_t gpio)
     40 {
     41 	HALASSERT(gpio < AR_NUM_GPIO);
     42 	OS_REG_CLR_BIT(ah, AR_GPIO_INTR_OUT, AR_GPIO_BIT(gpio));
     43 	return AH_TRUE;
     44 }
     45 
     46 /*
     47  * Configure GPIO Input lines
     48  */
     49 HAL_BOOL
     50 ar5416GpioCfgInput(struct ath_hal *ah, uint32_t gpio)
     51 {
     52 	HALASSERT(gpio < AR_NUM_GPIO);
     53 	OS_REG_SET_BIT(ah, AR_GPIO_INTR_OUT, AR_GPIO_BIT(gpio));
     54 	return AH_TRUE;
     55 }
     56 
     57 /*
     58  * Once configured for I/O - set output lines
     59  */
     60 HAL_BOOL
     61 ar5416GpioSet(struct ath_hal *ah, uint32_t gpio, uint32_t val)
     62 {
     63 	uint32_t reg;
     64 
     65 	HALASSERT(gpio < AR_NUM_GPIO);
     66 	reg = MS(OS_REG_READ(ah, AR_GPIO_INTR_OUT), AR_GPIO_OUT_VAL);
     67 	if (val & 1)
     68 		reg |= AR_GPIO_BIT(gpio);
     69 	else
     70 		reg &= ~AR_GPIO_BIT(gpio);
     71 
     72 	OS_REG_RMW_FIELD(ah, AR_GPIO_INTR_OUT, AR_GPIO_OUT_VAL, reg);
     73 	return AH_TRUE;
     74 }
     75 
     76 /*
     77  * Once configured for I/O - get input lines
     78  */
     79 uint32_t
     80 ar5416GpioGet(struct ath_hal *ah, uint32_t gpio)
     81 {
     82 	if (gpio >= AR_NUM_GPIO)
     83 		return 0xffffffff;
     84 	return ((OS_REG_READ(ah, AR_GPIO_IN) & AR_GPIO_BIT(gpio)) >> gpio);
     85 }
     86 
     87 /*
     88  * Set the GPIO Interrupt
     89  */
     90 void
     91 ar5416GpioSetIntr(struct ath_hal *ah, u_int gpio, uint32_t ilevel)
     92 {
     93 	uint32_t val;
     94 
     95 	HALASSERT(gpio < AR_NUM_GPIO);
     96 	/* XXX bounds check gpio */
     97 	val = MS(OS_REG_READ(ah, AR_GPIO_INTR_OUT), AR_GPIO_INTR_CTRL);
     98 	if (ilevel)		/* 0 == interrupt on pin high */
     99 		val &= ~AR_GPIO_BIT(gpio);
    100 	else			/* 1 == interrupt on pin low */
    101 		val |= AR_GPIO_BIT(gpio);
    102 	OS_REG_RMW_FIELD(ah, AR_GPIO_INTR_OUT, AR_GPIO_INTR_CTRL, val);
    103 
    104 	/* Change the interrupt mask. */
    105 	val = MS(OS_REG_READ(ah, AR_INTR_ASYNC_ENABLE), AR_INTR_GPIO);
    106 	val |= AR_GPIO_BIT(gpio);
    107 	OS_REG_RMW_FIELD(ah, AR_INTR_ASYNC_ENABLE, AR_INTR_GPIO, val);
    108 
    109 	val = MS(OS_REG_READ(ah, AR_INTR_ASYNC_MASK), AR_INTR_GPIO);
    110 	val |= AR_GPIO_BIT(gpio);
    111 	OS_REG_RMW_FIELD(ah, AR_INTR_ASYNC_MASK, AR_INTR_GPIO, val);
    112 }
    113