diff options
Diffstat (limited to 'sys/dev/ath/ath_hal/ar5212/ar5212_power.c')
| -rw-r--r-- | sys/dev/ath/ath_hal/ar5212/ar5212_power.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/sys/dev/ath/ath_hal/ar5212/ar5212_power.c b/sys/dev/ath/ath_hal/ar5212/ar5212_power.c new file mode 100644 index 000000000000..bfa407598aef --- /dev/null +++ b/sys/dev/ath/ath_hal/ar5212/ar5212_power.c @@ -0,0 +1,179 @@ +/*- + * SPDX-License-Identifier: ISC + * + * 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. + */ +#include "opt_ah.h" + +#include "ah.h" +#include "ah_internal.h" + +#include "ar5212/ar5212.h" +#include "ar5212/ar5212reg.h" +#include "ar5212/ar5212desc.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 +ar5212SetPowerModeAwake(struct ath_hal *ah, int setChip) +{ +#define AR_SCR_MASK \ + (AR_SCR_SLDUR|AR_SCR_SLE|AR_SCR_SLDTP|AR_SCR_SLDWP|\ + AR_SCR_SLEPOL|AR_SCR_MIBIE|AR_SCR_UNKNOWN) +#define POWER_UP_TIME 2000 + uint32_t scr, val; + int i; + + if (setChip) { + /* + * Be careful setting the AWAKE mode. When we are called + * with the chip powered down the read returns 0xffffffff + * which when blindly written back with OS_REG_RMW_FIELD + * enables the MIB interrupt for the sleep performance + * counters. This can result in an interrupt storm when + * ANI is in operation as no one knows to turn off the MIB + * interrupt cause. + */ + scr = OS_REG_READ(ah, AR_SCR); + if (scr & ~AR_SCR_MASK) { + HALDEBUG(ah, HAL_DEBUG_ANY, + "%s: bogus SCR 0x%x, PCICFG 0x%x\n", + __func__, scr, OS_REG_READ(ah, AR_PCICFG)); + scr = 0; + } + scr = (scr &~ AR_SCR_SLE) | AR_SCR_SLE_WAKE; + OS_REG_WRITE(ah, AR_SCR, scr); + OS_DELAY(10); /* Give chip the chance to awake */ + + for (i = POWER_UP_TIME / 50; i != 0; i--) { + val = OS_REG_READ(ah, AR_PCICFG); + if ((val & AR_PCICFG_SPWR_DN) == 0) + break; + OS_DELAY(50); + OS_REG_WRITE(ah, AR_SCR, scr); + } + if (i == 0) { +#ifdef AH_DEBUG + ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n", + __func__, POWER_UP_TIME/50); +#endif + return AH_FALSE; + } + } + + OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); + return AH_TRUE; +#undef POWER_UP_TIME +#undef AR_SCR_MASK +} + +/* + * Notify Power Mgt is disabled in self-generated frames. + * If requested, force chip to sleep. + */ +static void +ar5212SetPowerModeSleep(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 +ar5212SetPowerModeNetworkSleep(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); +} + +/* + * Set power mgt to the requested mode, and conditionally set + * the chip as well + */ +HAL_BOOL +ar5212SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) +{ +#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[ah->ah_powerMode], modes[mode], + setChip ? "set chip " : ""); + switch (mode) { + case HAL_PM_AWAKE: + if (setChip) + ah->ah_powerMode = mode; + status = ar5212SetPowerModeAwake(ah, setChip); + break; + case HAL_PM_FULL_SLEEP: + ar5212SetPowerModeSleep(ah, setChip); + if (setChip) + ah->ah_powerMode = mode; + break; + case HAL_PM_NETWORK_SLEEP: + ar5212SetPowerModeNetworkSleep(ah, setChip); + if (setChip) + ah->ah_powerMode = mode; + break; + default: + HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n", + __func__, mode); + return AH_FALSE; + } + return status; +} + +/* + * Return the current sleep mode of the chip + */ +HAL_POWER_MODE +ar5212GetPowerMode(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); +} + +#if 0 +/* + * Return the current sleep state of the chip + * TRUE = sleeping + */ +HAL_BOOL +ar5212GetPowerStatus(struct ath_hal *ah) +{ + return (OS_REG_READ(ah, AR_PCICFG) & AR_PCICFG_SPWR_DN) != 0; +} +#endif |