/* * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting * Copyright (c) 2002-2006 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: ar5211_power.c,v 1.1.1.1 2008/12/11 04:46:32 alc Exp $ */ #include "opt_ah.h" #include "ah.h" #include "ah_internal.h" #include "ar5211/ar5211.h" #include "ar5211/ar5211reg.h" #include "ar5211/ar5211desc.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 ar5211SetPowerModeAwake(struct ath_hal *ah, int setChip) { #define POWER_UP_TIME 2000 uint32_t val; int i; if (setChip) { OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_WAKE); OS_DELAY(10); /* Give chip the chance to awake */ for (i = POWER_UP_TIME / 200; i != 0; i--) { val = OS_REG_READ(ah, AR_PCICFG); if ((val & AR_PCICFG_SPWR_DN) == 0) break; OS_DELAY(200); OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_WAKE); } if (i == 0) { #ifdef AH_DEBUG ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n", __func__, POWER_UP_TIME/20); #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 ar5211SetPowerModeSleep(struct ath_hal *ah, int setChip) { OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); if (setChip) OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_SLP); } /* * 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 ar5211SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip) { OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); if (setChip) OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_NORM); } HAL_BOOL ar5211SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) { struct ath_hal_5211 *ahp = AH5211(ah); #ifdef AH_DEBUG static const char* modes[] = { "AWAKE", "FULL-SLEEP", "NETWORK SLEEP", "UNDEFINED" }; #endif int status = 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 = ar5211SetPowerModeAwake(ah, setChip); break; case HAL_PM_FULL_SLEEP: ar5211SetPowerModeSleep(ah, setChip); break; case HAL_PM_NETWORK_SLEEP: ar5211SetPowerModeNetworkSleep(ah, setChip); break; default: HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n", __func__, mode); return AH_FALSE; } ahp->ah_powerMode = mode; return status; } HAL_POWER_MODE ar5211GetPowerMode(struct ath_hal *ah) { /* Just so happens the h/w maps directly to the abstracted value */ return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE); }