diff options
Diffstat (limited to 'sys/dev/ath/ath_hal/ar5416/ar5416_power.c')
| -rw-r--r-- | sys/dev/ath/ath_hal/ar5416/ar5416_power.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/sys/dev/ath/ath_hal/ar5416/ar5416_power.c b/sys/dev/ath/ath_hal/ar5416/ar5416_power.c new file mode 100644 index 000000000000..634e7a1e7dbc --- /dev/null +++ b/sys/dev/ath/ath_hal/ar5416/ar5416_power.c @@ -0,0 +1,189 @@ +/*- + * 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 "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; + AH5416(ah)->ah_initPLL(ah, AH_NULL); + } + + if (AR_SREV_HOWL(ah)) + OS_REG_SET_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN); + + OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); + if (AR_SREV_HOWL(ah)) + OS_DELAY(10000); + else + 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); + if (! AR_SREV_HOWL(ah)) + OS_REG_WRITE(ah, AR_RC, AR_RC_AHB|AR_RC_HOSTIF); + /* Shutdown chip. Active low */ + if (! AR_SREV_OWL(ah)) + 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) +{ +#ifdef AH_DEBUG + static const char* modes[] = { + "AWAKE", + "FULL-SLEEP", + "NETWORK SLEEP", + "UNDEFINED" + }; +#endif + int status = AH_TRUE; + +#if 0 + if (!setChip) + return AH_TRUE; +#endif + + 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 = ar5416SetPowerModeAwake(ah, setChip); + break; + case HAL_PM_FULL_SLEEP: + ar5416SetPowerModeSleep(ah, setChip); + if (setChip) + ah->ah_powerMode = mode; + break; + case HAL_PM_NETWORK_SLEEP: + ar5416SetPowerModeNetworkSleep(ah, setChip); + if (setChip) + ah->ah_powerMode = mode; + break; + default: + HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode 0x%x\n", + __func__, mode); + return AH_FALSE; + } + 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; + } +} |