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.
22 #include "ah_internal.h"
24 #include "ar5416/ar5416.h"
25 #include "ar5416/ar5416reg.h"
28 * Notify Power Mgt is enabled in self-generated frames.
29 * If requested, force chip awake.
31 * Returns A_OK if chip is awake or successfully forced awake.
33 * WARNING WARNING WARNING
34 * There is a problem with the chip where sometimes it will not wake up.
37 ar5416SetPowerModeAwake(struct ath_hal *ah, int setChip)
39 #define POWER_UP_TIME 200000
45 * Do a Power-On-Reset if OWL is shutdown
46 * the NetBSD driver power-cycles the Cardbus slot
47 * as part of the reset procedure.
49 if ((OS_REG_READ(ah, AR_RTC_STATUS)
50 & AR_RTC_PM_STATUS_M) == AR_RTC_STATUS_SHUTDOWN) {
51 if (!ar5416SetResetReg(ah, HAL_RESET_POWER_ON))
53 AH5416(ah)->ah_initPLL(ah, AH_NULL);
57 OS_REG_SET_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN);
59 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
63 OS_DELAY(50); /* Give chip the chance to awake */
65 for (i = POWER_UP_TIME / 50; i != 0; i--) {
66 val = OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M;
67 if (val == AR_RTC_STATUS_ON)
70 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
75 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n",
76 __func__, POWER_UP_TIME/1000);
82 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
88 * Notify Power Mgt is disabled in self-generated frames.
89 * If requested, force chip to sleep.
92 ar5416SetPowerModeSleep(struct ath_hal *ah, int setChip)
94 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
96 /* Clear the RTC force wake bit to allow the mac to sleep */
97 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
98 if (! AR_SREV_HOWL(ah))
99 OS_REG_WRITE(ah, AR_RC, AR_RC_AHB|AR_RC_HOSTIF);
100 /* Shutdown chip. Active low */
101 if (! AR_SREV_OWL(ah))
102 OS_REG_CLR_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN);
107 * Notify Power Management is enabled in self-generating
108 * fames. If request, set power mode of chip to
109 * auto/normal. Duration in units of 128us (1/8 TU).
112 ar5416SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip)
114 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
117 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
121 * Set power mgt to the requested mode, and conditionally set
125 ar5416SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip)
127 struct ath_hal_5212 *ahp = AH5212(ah);
129 static const char* modes[] = {
136 int status = AH_TRUE;
140 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
141 modes[ahp->ah_powerMode], modes[mode], setChip ? "set chip " : "");
144 status = ar5416SetPowerModeAwake(ah, setChip);
146 case HAL_PM_FULL_SLEEP:
147 ar5416SetPowerModeSleep(ah, setChip);
149 case HAL_PM_NETWORK_SLEEP:
150 ar5416SetPowerModeNetworkSleep(ah, setChip);
153 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode 0x%x\n",
157 ahp->ah_powerMode = mode;
162 * Return the current sleep mode of the chip
165 ar5416GetPowerMode(struct ath_hal *ah)
167 int mode = OS_REG_READ(ah, AR_RTC_STATUS);
168 switch (mode & AR_RTC_PM_STATUS_M) {
169 case AR_RTC_STATUS_ON:
170 case AR_RTC_STATUS_WAKEUP:
172 case AR_RTC_STATUS_SLEEP:
173 return HAL_PM_NETWORK_SLEEP;
174 case AR_RTC_STATUS_SHUTDOWN:
175 return HAL_PM_FULL_SLEEP;
177 HALDEBUG(ah, HAL_DEBUG_ANY,
178 "%s: unknown power mode, RTC_STATUS 0x%x\n",
180 return HAL_PM_UNDEFINED;