sys/external/isc/atheros_hal/dist/ar5312/ar5312_gpio.c

   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: ar5312_gpio.c,v 1.1.1.1 2008/12/11 04:46:45 alc Exp $
  18  */
  19 #include "opt_ah.h"
  20
  21 #ifdef AH_SUPPORT_AR5312
  22
  23 #include "ah.h"
  24 #include "ah_internal.h"
  25 #include "ah_devid.h"
  26
  27 #include "ar5312/ar5312.h"
  28 #include "ar5312/ar5312reg.h"
  29 #include "ar5312/ar5312phy.h"
  30
  31 #define AR_NUM_GPIO     6               /* 6 GPIO pins */
  32 #define AR5312_GPIOD_MASK       0x0000002F      /* GPIO data reg r/w mask */
  33
  34 /*
  35  * Configure GPIO Output lines
  36  */
  37 HAL_BOOL
  38 ar5312GpioCfgOutput(struct ath_hal *ah, uint32_t gpio)
  39 {
  40         uint32_t gpioOffset = (AR5312_GPIO_BASE - ((uint32_t) ah->ah_sh));
  41
  42         HALASSERT(gpio < AR_NUM_GPIO);
  43
  44         OS_REG_WRITE(ah, gpioOffset+AR5312_GPIOCR,
  45                   (OS_REG_READ(ah, gpioOffset+AR5312_GPIOCR) &~ AR_GPIOCR_CR_A(gpio))
  46                 | AR_GPIOCR_CR_A(gpio));
  47
  48         return AH_TRUE;
  49 }
  50
  51 /*
  52  * Configure GPIO Input lines
  53  */
  54 HAL_BOOL
  55 ar5312GpioCfgInput(struct ath_hal *ah, uint32_t gpio)
  56 {
  57         uint32_t gpioOffset = (AR5312_GPIO_BASE - ((uint32_t) ah->ah_sh));
  58
  59         HALASSERT(gpio < AR_NUM_GPIO);
  60
  61         OS_REG_WRITE(ah, gpioOffset+AR5312_GPIOCR,
  62                   (OS_REG_READ(ah, gpioOffset+AR5312_GPIOCR) &~ AR_GPIOCR_CR_A(gpio))
  63                 | AR_GPIOCR_CR_N(gpio));
  64
  65         return AH_TRUE;
  66 }
  67
  68 /*
  69  * Once configured for I/O - set output lines
  70  */
  71 HAL_BOOL
  72 ar5312GpioSet(struct ath_hal *ah, uint32_t gpio, uint32_t val)
  73 {
  74         uint32_t reg;
  75         uint32_t gpioOffset = (AR5312_GPIO_BASE - ((uint32_t) ah->ah_sh));
  76
  77         HALASSERT(gpio < AR_NUM_GPIO);
  78
  79         reg =  OS_REG_READ(ah, gpioOffset+AR5312_GPIODO);
  80         reg &= ~(1 << gpio);
  81         reg |= (val&1) << gpio;
  82
  83         OS_REG_WRITE(ah, gpioOffset+AR5312_GPIODO, reg);
  84         return AH_TRUE;
  85 }
  86
  87 /*
  88  * Once configured for I/O - get input lines
  89  */
  90 uint32_t
  91 ar5312GpioGet(struct ath_hal *ah, uint32_t gpio)
  92 {
  93         uint32_t gpioOffset = (AR5312_GPIO_BASE - ((uint32_t) ah->ah_sh));
  94
  95         if (gpio < AR_NUM_GPIO) {
  96                 uint32_t val = OS_REG_READ(ah, gpioOffset+AR5312_GPIODI);
  97                 val = ((val & AR5312_GPIOD_MASK) >> gpio) & 0x1;
  98                 return val;
  99         } else {
 100                 return 0xffffffff;
 101         }
 102 }
 103
 104 /*
 105  * Set the GPIO Interrupt
 106  */
 107 void
 108 ar5312GpioSetIntr(struct ath_hal *ah, u_int gpio, uint32_t ilevel)
 109 {
 110         uint32_t val;
 111         uint32_t gpioOffset = (AR5312_GPIO_BASE - ((uint32_t) ah->ah_sh));
 112
 113         /* XXX bounds check gpio */
 114         val = OS_REG_READ(ah, gpioOffset+AR5312_GPIOCR);
 115         val &= ~(AR_GPIOCR_CR_A(gpio) |
 116                  AR_GPIOCR_INT_MASK | AR_GPIOCR_INT_ENA | AR_GPIOCR_INT_SEL);
 117         val |= AR_GPIOCR_CR_N(gpio) | AR_GPIOCR_INT(gpio) | AR_GPIOCR_INT_ENA;
 118         if (ilevel)
 119                 val |= AR_GPIOCR_INT_SELH;      /* interrupt on pin high */
 120         else
 121                 val |= AR_GPIOCR_INT_SELL;      /* interrupt on pin low */
 122
 123         /* Don't need to change anything for low level interrupt. */
 124         OS_REG_WRITE(ah, gpioOffset+AR5312_GPIOCR, val);
 125
 126         /* Change the interrupt mask. */
 127         (void) ar5212SetInterrupts(ah, AH5212(ah)->ah_maskReg | HAL_INT_GPIO);
 128 }
 129
 130
 131 #endif /* AH_SUPPORT_AR5312 */