/* * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting * Copyright (c) 2002-2008 Atheros Communications, Inc. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * $Id: ar5416_power.c,v 1.1.1.1 2008/12/11 04:46:48 alc Exp $ */ #include "opt_ah.h" #include "ah.h" #include "ah_internal.h" #include "ar5416/ar5416.h" #include "ar5416/ar5416reg.h" /* * Notify Power Mgt is enabled in self-generated frames. * If requested, force chip awake. * * Returns A_OK if chip is awake or successfully forced awake. * * WARNING WARNING WARNING * There is a problem with the chip where sometimes it will not wake up. */ static HAL_BOOL ar5416SetPowerModeAwake(struct ath_hal *ah, int setChip) { #define POWER_UP_TIME 200000 uint32_t val; int i = 0; if (setChip) { /* * Do a Power-On-Reset if OWL is shutdown * the NetBSD driver power-cycles the Cardbus slot * as part of the reset procedure. */ if ((OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_PM_STATUS_M) == AR_RTC_STATUS_SHUTDOWN) { if (!ar5416SetResetReg(ah, HAL_RESET_POWER_ON)) goto bad; } OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); OS_DELAY(50); /* Give chip the chance to awake */ for (i = POWER_UP_TIME / 50; i != 0; i--) { val = OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M; if (val == AR_RTC_STATUS_ON) break; OS_DELAY(50); OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); } bad: if (i == 0) { #ifdef AH_DEBUG ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n", __func__, POWER_UP_TIME/1000); #endif return AH_FALSE; } } OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); return AH_TRUE; #undef POWER_UP_TIME } /* * Notify Power Mgt is disabled in self-generated frames. * If requested, force chip to sleep. */ static void ar5416SetPowerModeSleep(struct ath_hal *ah, int setChip) { OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); if (setChip) { /* Clear the RTC force wake bit to allow the mac to sleep */ OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); OS_REG_WRITE(ah, AR_RC, AR_RC_AHB|AR_RC_HOSTIF); /* Shutdown chip. Active low */ OS_REG_CLR_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN); } } /* * Notify Power Management is enabled in self-generating * fames. If request, set power mode of chip to * auto/normal. Duration in units of 128us (1/8 TU). */ static void ar5416SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip) { OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); if (setChip) OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); } /* * Set power mgt to the requested mode, and conditionally set * the chip as well */ HAL_BOOL ar5416SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) { struct ath_hal_5212 *ahp = AH5212(ah); #ifdef AH_DEBUG static const char* modes[] = { "AWAKE", "FULL-SLEEP", "NETWORK SLEEP", "UNDEFINED" }; #endif int status = AH_TRUE; if (!setChip) return AH_TRUE; HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__, modes[ahp->ah_powerMode], modes[mode], setChip ? "set chip " : ""); switch (mode) { case HAL_PM_AWAKE: status = ar5416SetPowerModeAwake(ah, setChip); break; case HAL_PM_FULL_SLEEP: ar5416SetPowerModeSleep(ah, setChip); break; case HAL_PM_NETWORK_SLEEP: ar5416SetPowerModeNetworkSleep(ah, setChip); break; default: HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode 0x%x\n", __func__, mode); return AH_FALSE; } ahp->ah_powerMode = mode; return status; } /* * Return the current sleep mode of the chip */ HAL_POWER_MODE ar5416GetPowerMode(struct ath_hal *ah) { int mode = OS_REG_READ(ah, AR_RTC_STATUS); switch (mode & AR_RTC_PM_STATUS_M) { case AR_RTC_STATUS_ON: case AR_RTC_STATUS_WAKEUP: return HAL_PM_AWAKE; case AR_RTC_STATUS_SLEEP: return HAL_PM_NETWORK_SLEEP; case AR_RTC_STATUS_SHUTDOWN: return HAL_PM_FULL_SLEEP; default: HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode, RTC_STATUS 0x%x\n", __func__, mode); return HAL_PM_UNDEFINED; } }