FreeBSD/Linux Kernel Cross Reference
sys/dev/ath/ath_hal/ar5312/ar5315_gpio.c

     /*-
      * 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.
     *
     * $FreeBSD$
     */
    #include "opt_ah.h"
    
    #if (AH_SUPPORT_2316 || AH_SUPPORT_2317)
    
    #include "ah.h"
    #include "ah_internal.h"
    #include "ah_devid.h"
    
    #include "ar5312/ar5312.h"
    #include "ar5312/ar5312reg.h"
    #include "ar5312/ar5312phy.h"
    
    #define AR_NUM_GPIO     7               /* 6 GPIO pins */
    #define AR5315_GPIOD_MASK       0x0000007F      /* GPIO data reg r/w mask */
    
    /*
     * Configure GPIO Output lines
     */
    HAL_BOOL
    ar5315GpioCfgOutput(struct ath_hal *ah, uint32_t gpio, HAL_GPIO_MUX_TYPE type)
    {
            uint32_t gpioOffset = (AR5315_GPIO_BASE - ((uint32_t) ah->ah_sh));
    
            HALASSERT(gpio < AR_NUM_GPIO);
    
            OS_REG_WRITE(ah, gpioOffset+AR5315_GPIODIR,
                      (OS_REG_READ(ah, gpioOffset+AR5315_GPIODIR) &~ AR5315_GPIODIR_M(gpio))
                    | AR5315_GPIODIR_O(gpio));
    
            return AH_TRUE;
    }
    
    /*
     * Configure GPIO Input lines
     */
    HAL_BOOL
    ar5315GpioCfgInput(struct ath_hal *ah, uint32_t gpio)
    {
            uint32_t gpioOffset = (AR5315_GPIO_BASE - ((uint32_t) ah->ah_sh));
    
            HALASSERT(gpio < AR_NUM_GPIO);
    
            OS_REG_WRITE(ah, gpioOffset+AR5315_GPIODIR,
                      (OS_REG_READ(ah, gpioOffset+AR5315_GPIODIR) &~ AR5315_GPIODIR_M(gpio))
                    | AR5315_GPIODIR_I(gpio));
    
            return AH_TRUE;
    }
    
    /*
     * Once configured for I/O - set output lines
     */
    HAL_BOOL
    ar5315GpioSet(struct ath_hal *ah, uint32_t gpio, uint32_t val)
    {
            uint32_t reg;
            uint32_t gpioOffset = (AR5315_GPIO_BASE - ((uint32_t) ah->ah_sh));
    
            HALASSERT(gpio < AR_NUM_GPIO);
    
            reg =  OS_REG_READ(ah, gpioOffset+AR5315_GPIODO);
            reg &= ~(1 << gpio);
            reg |= (val&1) << gpio;
    
            OS_REG_WRITE(ah, gpioOffset+AR5315_GPIODO, reg);
            return AH_TRUE;
    }
    
    /*
     * Once configured for I/O - get input lines
     */
    uint32_t
    ar5315GpioGet(struct ath_hal *ah, uint32_t gpio)
    {
            uint32_t gpioOffset = (AR5315_GPIO_BASE - ((uint32_t) ah->ah_sh));
    
            if (gpio < AR_NUM_GPIO) {
                    uint32_t val = OS_REG_READ(ah, gpioOffset+AR5315_GPIODI);
                    val = ((val & AR5315_GPIOD_MASK) >> gpio) & 0x1;
                   return val;
           } else  {
                   return 0xffffffff;
           }
   }
   
   /*
    * Set the GPIO Interrupt
    */
   void
   ar5315GpioSetIntr(struct ath_hal *ah, u_int gpio, uint32_t ilevel)
   {
           uint32_t val;
           uint32_t gpioOffset = (AR5315_GPIO_BASE - ((uint32_t) ah->ah_sh));
   
           /* XXX bounds check gpio */
           val = OS_REG_READ(ah, gpioOffset+AR5315_GPIOINT);
           val &= ~(AR5315_GPIOINT_M | AR5315_GPIOINTLVL_M);
           val |= gpio << AR5315_GPIOINT_S;
           if (ilevel)
                   val |= 2 << AR5315_GPIOINTLVL_S;        /* interrupt on pin high */
           else
                   val |= 1 << AR5315_GPIOINTLVL_S;        /* interrupt on pin low */
   
           /* Don't need to change anything for low level interrupt. */
           OS_REG_WRITE(ah, gpioOffset+AR5315_GPIOINT, val);
   
           /* Change the interrupt mask. */
           (void) ar5212SetInterrupts(ah, AH5212(ah)->ah_maskReg | HAL_INT_GPIO);
   }
   
   #endif /* AH_SUPPORT_2316 || AH_SUPPORT_2317 */

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