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))
55 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
56 OS_DELAY(50); /* Give chip the chance to awake */
58 for (i = POWER_UP_TIME / 50; i != 0; i--) {
59 val = OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M;
60 if (val == AR_RTC_STATUS_ON)
63 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
68 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n",
69 __func__, POWER_UP_TIME/1000);
75 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
81 * Notify Power Mgt is disabled in self-generated frames.
82 * If requested, force chip to sleep.
85 ar5416SetPowerModeSleep(struct ath_hal *ah, int setChip)
87 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
89 /* Clear the RTC force wake bit to allow the mac to sleep */
90 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
91 OS_REG_WRITE(ah, AR_RC, AR_RC_AHB|AR_RC_HOSTIF);
92 /* Shutdown chip. Active low */
93 OS_REG_CLR_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN);
98 * Notify Power Management is enabled in self-generating
99 * fames. If request, set power mode of chip to
100 * auto/normal. Duration in units of 128us (1/8 TU).
103 ar5416SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip)
105 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
108 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN);
112 * Set power mgt to the requested mode, and conditionally set
116 ar5416SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip)
118 struct ath_hal_5212 *ahp = AH5212(ah);
120 static const char* modes[] = {
127 int status = AH_TRUE;
131 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
132 modes[ahp->ah_powerMode], modes[mode], setChip ? "set chip " : "");
135 status = ar5416SetPowerModeAwake(ah, setChip);
137 case HAL_PM_FULL_SLEEP:
138 ar5416SetPowerModeSleep(ah, setChip);
140 case HAL_PM_NETWORK_SLEEP:
141 ar5416SetPowerModeNetworkSleep(ah, setChip);
144 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode 0x%x\n",
148 ahp->ah_powerMode = mode;
153 * Return the current sleep mode of the chip
156 ar5416GetPowerMode(struct ath_hal *ah)
158 int mode = OS_REG_READ(ah, AR_RTC_STATUS);
159 switch (mode & AR_RTC_PM_STATUS_M) {
160 case AR_RTC_STATUS_ON:
161 case AR_RTC_STATUS_WAKEUP:
163 case AR_RTC_STATUS_SLEEP:
164 return HAL_PM_NETWORK_SLEEP;
165 case AR_RTC_STATUS_SHUTDOWN:
166 return HAL_PM_FULL_SLEEP;
168 HALDEBUG(ah, HAL_DEBUG_ANY,
169 "%s: unknown power mode, RTC_STATUS 0x%x\n",
171 return HAL_PM_UNDEFINED;