workbench/devs/networks/atheros5000/hal/ar5416/ar5416_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  * $Id$
  18  */
  19 #include "opt_ah.h"
  20
  21 #ifdef AH_SUPPORT_AR5416
  22
  23 #include "ah.h"
  24 #include "ah_internal.h"
  25 #include "ah_devid.h"
  26 #ifdef AH_DEBUG
  27 #include "ah_desc.h"                    /* NB: for HAL_PHYERR* */
  28 #endif
  29
  30 #include "ar5416/ar5416.h"
  31 #include "ar5416/ar5416reg.h"
  32 #include "ar5416/ar5416phy.h"
  33
  34 #define AR_NUM_GPIO     6               /* 6 GPIO pins */
  35 #define AR_GPIO_BIT(_gpio)      (1 << _gpio)
  36
  37 /*
  38  * Configure GPIO Output lines
  39  */
  40 HAL_BOOL
  41 ar5416GpioCfgOutput(struct ath_hal *ah, uint32_t gpio)
  42 {
  43         HALASSERT(gpio < AR_NUM_GPIO);
  44         OS_REG_CLR_BIT(ah, AR_GPIO_INTR_OUT, AR_GPIO_BIT(gpio));
  45         return AH_TRUE;
  46 }
  47
  48 /*
  49  * Configure GPIO Input lines
  50  */
  51 HAL_BOOL
  52 ar5416GpioCfgInput(struct ath_hal *ah, uint32_t gpio)
  53 {
  54         HALASSERT(gpio < AR_NUM_GPIO);
  55         OS_REG_SET_BIT(ah, AR_GPIO_INTR_OUT, AR_GPIO_BIT(gpio));
  56         return AH_TRUE;
  57 }
  58
  59 /*
  60  * Once configured for I/O - set output lines
  61  */
  62 HAL_BOOL
  63 ar5416GpioSet(struct ath_hal *ah, uint32_t gpio, uint32_t val)
  64 {
  65         uint32_t reg;
  66
  67         HALASSERT(gpio < AR_NUM_GPIO);
  68         reg = MS(OS_REG_READ(ah, AR_GPIO_INTR_OUT), AR_GPIO_OUT_VAL);
  69         if (val & 1)
  70                 reg |= AR_GPIO_BIT(gpio);
  71         else
  72                 reg &= ~AR_GPIO_BIT(gpio);
  73
  74         OS_REG_RMW_FIELD(ah, AR_GPIO_INTR_OUT, AR_GPIO_OUT_VAL, reg);
  75         return AH_TRUE;
  76 }
  77
  78 /*
  79  * Once configured for I/O - get input lines
  80  */
  81 uint32_t
  82 ar5416GpioGet(struct ath_hal *ah, uint32_t gpio)
  83 {
  84         if (gpio >= AR_NUM_GPIO)
  85                 return 0xffffffff;
  86         return ((OS_REG_READ(ah, AR_GPIO_IN) & AR_GPIO_BIT(gpio)) >> gpio);
  87 }
  88
  89 /*
  90  * Set the GPIO Interrupt
  91  */
  92 void
  93 ar5416GpioSetIntr(struct ath_hal *ah, u_int gpio, uint32_t ilevel)
  94 {
  95         uint32_t val;
  96
  97         HALASSERT(gpio < AR_NUM_GPIO);
  98         /* XXX bounds check gpio */
  99         val = MS(OS_REG_READ(ah, AR_GPIO_INTR_OUT), AR_GPIO_INTR_CTRL);
 100         if (ilevel)             /* 0 == interrupt on pin high */
 101                 val &= ~AR_GPIO_BIT(gpio);
 102         else                    /* 1 == interrupt on pin low */
 103                 val |= AR_GPIO_BIT(gpio);
 104         OS_REG_RMW_FIELD(ah, AR_GPIO_INTR_OUT, AR_GPIO_INTR_CTRL, val);
 105
 106         /* Change the interrupt mask. */
 107         val = MS(OS_REG_READ(ah, AR_INTR_ASYNC_ENABLE), AR_INTR_GPIO);
 108         val |= AR_GPIO_BIT(gpio);
 109         OS_REG_RMW_FIELD(ah, AR_INTR_ASYNC_ENABLE, AR_INTR_GPIO, val);
 110
 111         val = MS(OS_REG_READ(ah, AR_INTR_ASYNC_MASK), AR_INTR_GPIO);
 112         val |= AR_GPIO_BIT(gpio);
 113         OS_REG_RMW_FIELD(ah, AR_INTR_ASYNC_MASK, AR_INTR_GPIO, val);
 114 }
 115 #endif  /* AH_SUPPORT_AR5416 */