ar5416_gpio.c revision 185377 
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: ar5416_gpio.c,v 1.3 2008/11/10 04:08:04 sam Exp $
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 */
40HAL_BOOL
41ar5416GpioCfgOutput(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 */
51HAL_BOOL
52ar5416GpioCfgInput(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 */
62HAL_BOOL
63ar5416GpioSet(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 */
81uint32_t
82ar5416GpioGet(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 */
92void
93ar5416GpioSetIntr(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 */
116