/*-
 * SPDX-License-Identifier: ISC
 *
 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
 * Copyright (c) 2002-2008 Atheros Communications, Inc.
 *
 * Permission to use, copy, modify, and/or 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.
 */
#include "opt_ah.h"

#include "ah.h"
#include "ah_internal.h"
#include "ah_devid.h"
#ifdef AH_DEBUG
#include "ah_desc.h"                    /* NB: for HAL_PHYERR* */
#endif

#include "ar5212/ar5212.h"
#include "ar5212/ar5212reg.h"
#include "ar5212/ar5212phy.h"

#define AR_NUM_GPIO     6               /* 6 GPIO pins */
#define AR_GPIOD_MASK   0x0000002F      /* GPIO data reg r/w mask */

/*
 * Configure GPIO Output lines
 */
HAL_BOOL
ar5212GpioCfgOutput(struct ath_hal *ah, uint32_t gpio, HAL_GPIO_MUX_TYPE type)
{
        HALASSERT(gpio < AR_NUM_GPIO);

        /*
         * NB: AR_GPIOCR_CR_A(pin) is all 1's so there's no need
         *     to clear the field before or'ing in the new value.
         */
        OS_REG_WRITE(ah, AR_GPIOCR, 
                  OS_REG_READ(ah, AR_GPIOCR) | AR_GPIOCR_CR_A(gpio));

        return AH_TRUE;
}

/*
 * Configure GPIO Input lines
 */
HAL_BOOL
ar5212GpioCfgInput(struct ath_hal *ah, uint32_t gpio)
{
        HALASSERT(gpio < AR_NUM_GPIO);

        OS_REG_WRITE(ah, AR_GPIOCR, 
                  (OS_REG_READ(ah, AR_GPIOCR) &~ AR_GPIOCR_CR_A(gpio))
                | AR_GPIOCR_CR_N(gpio));

        return AH_TRUE;
}

/*
 * Once configured for I/O - set output lines
 */
HAL_BOOL
ar5212GpioSet(struct ath_hal *ah, uint32_t gpio, uint32_t val)
{
        uint32_t reg;

        HALASSERT(gpio < AR_NUM_GPIO);

        reg =  OS_REG_READ(ah, AR_GPIODO);
        reg &= ~(1 << gpio);
        reg |= (val&1) << gpio;

        OS_REG_WRITE(ah, AR_GPIODO, reg);
        return AH_TRUE;
}

/*
 * Once configured for I/O - get input lines
 */
uint32_t
ar5212GpioGet(struct ath_hal *ah, uint32_t gpio)
{
        if (gpio < AR_NUM_GPIO) {
                uint32_t val = OS_REG_READ(ah, AR_GPIODI);
                val = ((val & AR_GPIOD_MASK) >> gpio) & 0x1;
                return val;
        } else  {
                return 0xffffffff;
        }
}

/*
 * Set the GPIO Interrupt
 */
void
ar5212GpioSetIntr(struct ath_hal *ah, u_int gpio, uint32_t ilevel)
{
        uint32_t val;

        /* XXX bounds check gpio */
        val = OS_REG_READ(ah, AR_GPIOCR);
        val &= ~(AR_GPIOCR_CR_A(gpio) |
                 AR_GPIOCR_INT_MASK | AR_GPIOCR_INT_ENA | AR_GPIOCR_INT_SEL);
        val |= AR_GPIOCR_CR_N(gpio) | AR_GPIOCR_INT(gpio) | AR_GPIOCR_INT_ENA;
        if (ilevel)
                val |= AR_GPIOCR_INT_SELH;      /* interrupt on pin high */
        else
                val |= AR_GPIOCR_INT_SELL;      /* interrupt on pin low */

        /* Don't need to change anything for low level interrupt. */
        OS_REG_WRITE(ah, AR_GPIOCR, val);

        /* Change the interrupt mask. */
        (void) ar5212SetInterrupts(ah, AH5212(ah)->ah_maskReg | HAL_INT_GPIO);
}