| 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: ar5212_gpio.c,v 1.2 2011/03/07 11:25:43 cegger 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 "ar5212/ar5212.h" |
| 29 | #include "ar5212/ar5212reg.h" |
| 30 | #include "ar5212/ar5212phy.h" |
| 31 | |
| 32 | #define AR_NUM_GPIO 6 /* 6 GPIO pins */ |
| 33 | #define AR_GPIOD_MASK 0x0000002F /* GPIO data reg r/w mask */ |
| 34 | |
| 35 | /* |
| 36 | * Configure GPIO Output lines |
| 37 | */ |
| 38 | HAL_BOOL |
| 39 | ar5212GpioCfgOutput(struct ath_hal *ah, uint32_t gpio, HAL_GPIO_MUX_TYPE type) |
| 40 | { |
| 41 | HALASSERT(gpio < AR_NUM_GPIO); |
| 42 | |
| 43 | /* |
| 44 | * NB: AR_GPIOCR_CR_A(pin) is all 1's so there's no need |
| 45 | * to clear the field before or'ing in the new value. |
| 46 | */ |
| 47 | OS_REG_WRITE(ah, AR_GPIOCR, |
| 48 | OS_REG_READ(ah, AR_GPIOCR) | AR_GPIOCR_CR_A(gpio)); |
| 49 | |
| 50 | return AH_TRUE; |
| 51 | } |
| 52 | |
| 53 | /* |
| 54 | * Configure GPIO Input lines |
| 55 | */ |
| 56 | HAL_BOOL |
| 57 | ar5212GpioCfgInput(struct ath_hal *ah, uint32_t gpio) |
| 58 | { |
| 59 | HALASSERT(gpio < AR_NUM_GPIO); |
| 60 | |
| 61 | OS_REG_WRITE(ah, AR_GPIOCR, |
| 62 | (OS_REG_READ(ah, AR_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 | ar5212GpioSet(struct ath_hal *ah, uint32_t gpio, uint32_t val) |
| 73 | { |
| 74 | uint32_t reg; |
| 75 | |
| 76 | HALASSERT(gpio < AR_NUM_GPIO); |
| 77 | |
| 78 | reg = OS_REG_READ(ah, AR_GPIODO); |
| 79 | reg &= ~(1 << gpio); |
| 80 | reg |= (val&1) << gpio; |
| 81 | |
| 82 | OS_REG_WRITE(ah, AR_GPIODO, reg); |
| 83 | return AH_TRUE; |
| 84 | } |
| 85 | |
| 86 | /* |
| 87 | * Once configured for I/O - get input lines |
| 88 | */ |
| 89 | uint32_t |
| 90 | ar5212GpioGet(struct ath_hal *ah, uint32_t gpio) |
| 91 | { |
| 92 | if (gpio < AR_NUM_GPIO) { |
| 93 | uint32_t val = OS_REG_READ(ah, AR_GPIODI); |
| 94 | val = ((val & AR_GPIOD_MASK) >> gpio) & 0x1; |
| 95 | return val; |
| 96 | } else { |
| 97 | return 0xffffffff; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | /* |
| 102 | * Set the GPIO Interrupt |
| 103 | */ |
| 104 | void |
| 105 | ar5212GpioSetIntr(struct ath_hal *ah, u_int gpio, uint32_t ilevel) |
| 106 | { |
| 107 | uint32_t val; |
| 108 | |
| 109 | /* XXX bounds check gpio */ |
| 110 | val = OS_REG_READ(ah, AR_GPIOCR); |
| 111 | val &= ~(AR_GPIOCR_CR_A(gpio) | |
| 112 | AR_GPIOCR_INT_MASK | AR_GPIOCR_INT_ENA | AR_GPIOCR_INT_SEL); |
| 113 | val |= AR_GPIOCR_CR_N(gpio) | AR_GPIOCR_INT(gpio) | AR_GPIOCR_INT_ENA; |
| 114 | if (ilevel) |
| 115 | val |= AR_GPIOCR_INT_SELH; /* interrupt on pin high */ |
| 116 | else |
| 117 | val |= AR_GPIOCR_INT_SELL; /* interrupt on pin low */ |
| 118 | |
| 119 | /* Don't need to change anything for low level interrupt. */ |
| 120 | OS_REG_WRITE(ah, AR_GPIOCR, val); |
| 121 | |
| 122 | /* Change the interrupt mask. */ |
| 123 | (void) ar5212SetInterrupts(ah, AH5212(ah)->ah_maskReg | HAL_INT_GPIO); |
| 124 | } |
| 125 | |