1/*
2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
3 * Copyright (c) 2002-2004 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 * $FreeBSD$
18 */
19#include "opt_ah.h"
20
21#include "ah.h"
22#include "ah_internal.h"
23
24#include "ar5210/ar5210.h"
25#include "ar5210/ar5210reg.h"
26
27/*
28 * Notify Power Mgt is disabled in self-generated frames.
29 * If requested, set Power Mode of chip to auto/normal.
30 */
31static void
32ar5210SetPowerModeAuto(struct ath_hal *ah, int setChip)
33{
34	OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SV);
35	if (setChip)
36		OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_ALLOW);
37}
38
39/*
40 * Notify Power Mgt is enabled in self-generated frames.
41 * If requested, force chip awake.
42 *
43 * Returns A_OK if chip is awake or successfully forced awake.
44 *
45 * WARNING WARNING WARNING
46 * There is a problem with the chip where sometimes it will not wake up.
47 */
48static HAL_BOOL
49ar5210SetPowerModeAwake(struct ath_hal *ah, int setChip)
50{
51#define	POWER_UP_TIME	2000
52	uint32_t val;
53	int i;
54
55	if (setChip) {
56		OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_WAKE);
57		OS_DELAY(2000);	/* Give chip the chance to awake */
58
59		for (i = POWER_UP_TIME / 200; i != 0; i--) {
60			val = OS_REG_READ(ah, AR_PCICFG);
61			if ((val & AR_PCICFG_SPWR_DN) == 0)
62				break;
63			OS_DELAY(200);
64			OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE,
65				AR_SCR_SLE_WAKE);
66		}
67		if (i == 0) {
68#ifdef AH_DEBUG
69			ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n",
70				__func__, POWER_UP_TIME/20);
71#endif
72			return AH_FALSE;
73		}
74	}
75
76	OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SV);
77	return AH_TRUE;
78#undef POWER_UP_TIME
79}
80
81/*
82 * Notify Power Mgt is disabled in self-generated frames.
83 * If requested, force chip to sleep.
84 */
85static void
86ar5210SetPowerModeSleep(struct ath_hal *ah, int setChip)
87{
88	OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SV);
89	if (setChip)
90		OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_SLP);
91}
92
93HAL_BOOL
94ar5210SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip)
95{
96#ifdef AH_DEBUG
97	static const char* modes[] = {
98		"AWAKE",
99		"FULL-SLEEP",
100		"NETWORK SLEEP",
101		"UNDEFINED"
102	};
103#endif
104	int status = AH_TRUE;
105
106	HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
107		modes[ah->ah_powerMode], modes[mode],
108		setChip ? "set chip " : "");
109	switch (mode) {
110	case HAL_PM_AWAKE:
111		if (setChip)
112			ah->ah_powerMode = mode;
113		status = ar5210SetPowerModeAwake(ah, setChip);
114		break;
115	case HAL_PM_FULL_SLEEP:
116		ar5210SetPowerModeSleep(ah, setChip);
117		if (setChip)
118			ah->ah_powerMode = mode;
119		break;
120	case HAL_PM_NETWORK_SLEEP:
121		ar5210SetPowerModeAuto(ah, setChip);
122		if (setChip)
123			ah->ah_powerMode = mode;
124		break;
125	default:
126		HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n",
127		    __func__, mode);
128		return AH_FALSE;
129	}
130	return status;
131}
132
133HAL_POWER_MODE
134ar5210GetPowerMode(struct ath_hal *ah)
135{
136	/* Just so happens the h/w maps directly to the abstracted value */
137	return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE);
138}
139