2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
3 * Copyright (c) 2002-2008 Atheros Communications, Inc.
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.
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.
17 * $FreeBSD: head/sys/dev/ath/ath_hal/ar5416/ar5416_power.c 203156 2010-01-29 10:02:50Z rpaulo $
23 #include "ah_internal.h"
25 #include "ar5416/ar5416.h"
26 #include "ar5416/ar5416reg.h"
29 * Notify Power Mgt is enabled in self-generated frames.
30 * If requested, force chip awake.
32 * Returns A_OK if chip is awake or successfully forced awake.
34 * WARNING WARNING WARNING
35 * There is a problem with the chip where sometimes it will not wake up.
38 ar5416SetPowerModeAwake(struct ath_hal *ah, int setChip)
40 #define POWER_UP_TIME 200000
46 * Do a Power-On-Reset if OWL is shutdown
47 * the NetBSD driver power-cycles the Cardbus slot
48 * as part of the reset procedure.
50 if ((OS_REG_READ(ah, AR_RTC_STATUS)
51 & AR_RTC_PM_STATUS_M) == AR_RTC_STATUS_SHUTDOWN) {
52 if (!ar5416SetResetReg(ah, HAL_RESET_POWER_ON))
56 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
57 OS_DELAY(50); /* Give chip the chance to awake */
59 for (i = POWER_UP_TIME / 50; i != 0; i--) {
60 val = OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M;
61 if (val == AR_RTC_STATUS_ON)
64 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
69 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n",
70 __func__, POWER_UP_TIME/1000);
76 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
82 * Notify Power Mgt is disabled in self-generated frames.
83 * If requested, force chip to sleep.
86 ar5416SetPowerModeSleep(struct ath_hal *ah, int setChip)
88 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
90 /* Clear the RTC force wake bit to allow the mac to sleep */
91 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
92 OS_REG_WRITE(ah, AR_RC, AR_RC_AHB|AR_RC_HOSTIF);
93 /* Shutdown chip. Active low */
94 OS_REG_CLR_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN);
99 * Notify Power Management is enabled in self-generating
100 * fames. If request, set power mode of chip to
101 * auto/normal. Duration in units of 128us (1/8 TU).
104 ar5416SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip)
106 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
109 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
113 * Set power mgt to the requested mode, and conditionally set
117 ar5416SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip)
119 struct ath_hal_5212 *ahp = AH5212(ah);
121 static const char* modes[] = {
128 int status = AH_TRUE;
132 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
133 modes[ahp->ah_powerMode], modes[mode], setChip ? "set chip " : "");
136 status = ar5416SetPowerModeAwake(ah, setChip);
138 case HAL_PM_FULL_SLEEP:
139 ar5416SetPowerModeSleep(ah, setChip);
141 case HAL_PM_NETWORK_SLEEP:
142 ar5416SetPowerModeNetworkSleep(ah, setChip);
145 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode 0x%x\n",
149 ahp->ah_powerMode = mode;
154 * Return the current sleep mode of the chip
157 ar5416GetPowerMode(struct ath_hal *ah)
159 int mode = OS_REG_READ(ah, AR_RTC_STATUS);
160 switch (mode & AR_RTC_PM_STATUS_M) {
161 case AR_RTC_STATUS_ON:
162 case AR_RTC_STATUS_WAKEUP:
164 case AR_RTC_STATUS_SLEEP:
165 return HAL_PM_NETWORK_SLEEP;
166 case AR_RTC_STATUS_SHUTDOWN:
167 return HAL_PM_FULL_SLEEP;
169 HALDEBUG(ah, HAL_DEBUG_ANY,
170 "%s: unknown power mode, RTC_STATUS 0x%x\n",
172 return HAL_PM_UNDEFINED;