137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/*
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* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
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* Copyright (c) 2002-2006 Atheros Communications, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* $Id: ar5211_power.c,v 1.4 2008/11/10 04:08:02 sam Exp $
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*/
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#include "opt_ah.h"
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#include "ah.h"
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#include "ah_internal.h"
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#include "ar5211/ar5211.h"
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#include "ar5211/ar5211reg.h"
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#include "ar5211/ar5211desc.h"
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/*
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* Notify Power Mgt is enabled in self-generated frames.
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* If requested, force chip awake.
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*
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* Returns A_OK if chip is awake or successfully forced awake.
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*
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* WARNING WARNING WARNING
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* There is a problem with the chip where sometimes it will not wake up.
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*/
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static HAL_BOOL
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ar5211SetPowerModeAwake(struct ath_hal *ah, int setChip)
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{
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#define POWER_UP_TIME 2000
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uint32_t val;
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int i;
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if (setChip) {
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OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_WAKE);
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OS_DELAY(10); /* Give chip the chance to awake */
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for (i = POWER_UP_TIME / 200; i != 0; i--) {
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val = OS_REG_READ(ah, AR_PCICFG);
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if ((val & AR_PCICFG_SPWR_DN) == 0)
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break;
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OS_DELAY(200);
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OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE,
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AR_SCR_SLE_WAKE);
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}
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if (i == 0) {
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#ifdef AH_DEBUG
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ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n",
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__func__, POWER_UP_TIME/20);
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#endif
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return AH_FALSE;
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}
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}
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OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
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return AH_TRUE;
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#undef POWER_UP_TIME
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}
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/*
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* Notify Power Mgt is disabled in self-generated frames.
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* If requested, force chip to sleep.
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*/
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static void
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ar5211SetPowerModeSleep(struct ath_hal *ah, int setChip)
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{
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OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
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if (setChip)
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OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_SLP);
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}
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/*
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* Notify Power Management is enabled in self-generating
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* fames. If request, set power mode of chip to
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* auto/normal. Duration in units of 128us (1/8 TU).
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*/
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static void
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ar5211SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip)
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{
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OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
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if (setChip)
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OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_NORM);
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}
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HAL_BOOL
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ar5211SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip)
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{
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struct ath_hal_5211 *ahp = AH5211(ah);
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#ifdef AH_DEBUG
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static const char* modes[] = {
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"AWAKE",
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"FULL-SLEEP",
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"NETWORK SLEEP",
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"UNDEFINED"
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};
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#endif
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int status = AH_TRUE;
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HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
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modes[ahp->ah_powerMode], modes[mode],
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setChip ? "set chip " : "");
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switch (mode) {
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case HAL_PM_AWAKE:
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status = ar5211SetPowerModeAwake(ah, setChip);
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break;
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case HAL_PM_FULL_SLEEP:
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ar5211SetPowerModeSleep(ah, setChip);
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break;
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case HAL_PM_NETWORK_SLEEP:
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ar5211SetPowerModeNetworkSleep(ah, setChip);
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break;
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default:
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HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n",
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__func__, mode);
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return AH_FALSE;
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}
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ahp->ah_powerMode = mode;
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return status;
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}
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HAL_POWER_MODE
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ar5211GetPowerMode(struct ath_hal *ah)
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{
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/* Just so happens the h/w maps directly to the abstracted value */
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return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE);
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}
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