ar5416_power.c revision 185377
1/* 2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 3 * Copyright (c) 2002-2008 Atheros Communications, Inc. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 * 17 * $Id: ar5416_power.c,v 1.5 2008/11/10 04:08:04 sam Exp $ 18 */ 19#include "opt_ah.h" 20 21#ifdef AH_SUPPORT_AR5416 22 23#include "ah.h" 24#include "ah_internal.h" 25 26#include "ar5416/ar5416.h" 27#include "ar5416/ar5416reg.h" 28 29/* 30 * Notify Power Mgt is enabled in self-generated frames. 31 * If requested, force chip awake. 32 * 33 * Returns A_OK if chip is awake or successfully forced awake. 34 * 35 * WARNING WARNING WARNING 36 * There is a problem with the chip where sometimes it will not wake up. 37 */ 38static HAL_BOOL 39ar5416SetPowerModeAwake(struct ath_hal *ah, int setChip) 40{ 41#define POWER_UP_TIME 200000 42 uint32_t val; 43 int i = 0; 44 45 if (setChip) { 46 /* 47 * Do a Power-On-Reset if OWL is shutdown 48 * the NetBSD driver power-cycles the Cardbus slot 49 * as part of the reset procedure. 50 */ 51 if ((OS_REG_READ(ah, AR_RTC_STATUS) 52 & AR_RTC_PM_STATUS_M) == AR_RTC_STATUS_SHUTDOWN) { 53 if (!ar5416SetResetReg(ah, HAL_RESET_POWER_ON)) 54 goto bad; 55 } 56 57 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 58 OS_DELAY(50); /* Give chip the chance to awake */ 59 60 for (i = POWER_UP_TIME / 50; i != 0; i--) { 61 val = OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M; 62 if (val == AR_RTC_STATUS_ON) 63 break; 64 OS_DELAY(50); 65 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 66 } 67 bad: 68 if (i == 0) { 69#ifdef AH_DEBUG 70 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n", 71 __func__, POWER_UP_TIME/1000); 72#endif 73 return AH_FALSE; 74 } 75 } 76 77 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 78 return AH_TRUE; 79#undef POWER_UP_TIME 80} 81 82/* 83 * Notify Power Mgt is disabled in self-generated frames. 84 * If requested, force chip to sleep. 85 */ 86static void 87ar5416SetPowerModeSleep(struct ath_hal *ah, int setChip) 88{ 89 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 90 if (setChip) { 91 /* Clear the RTC force wake bit to allow the mac to sleep */ 92 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 93 OS_REG_WRITE(ah, AR_RC, AR_RC_AHB|AR_RC_HOSTIF); 94 /* Shutdown chip. Active low */ 95 OS_REG_CLR_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN); 96 } 97} 98 99/* 100 * Notify Power Management is enabled in self-generating 101 * fames. If request, set power mode of chip to 102 * auto/normal. Duration in units of 128us (1/8 TU). 103 */ 104static void 105ar5416SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip) 106{ 107 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 108 109 if (setChip) 110 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 111} 112 113/* 114 * Set power mgt to the requested mode, and conditionally set 115 * the chip as well 116 */ 117HAL_BOOL 118ar5416SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) 119{ 120 struct ath_hal_5212 *ahp = AH5212(ah); 121#ifdef AH_DEBUG 122 static const char* modes[] = { 123 "AWAKE", 124 "FULL-SLEEP", 125 "NETWORK SLEEP", 126 "UNDEFINED" 127 }; 128#endif 129 int status = AH_TRUE; 130 if (!setChip) 131 return AH_TRUE; 132 133 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__, 134 modes[ahp->ah_powerMode], modes[mode], setChip ? "set chip " : ""); 135 switch (mode) { 136 case HAL_PM_AWAKE: 137 status = ar5416SetPowerModeAwake(ah, setChip); 138 break; 139 case HAL_PM_FULL_SLEEP: 140 ar5416SetPowerModeSleep(ah, setChip); 141 break; 142 case HAL_PM_NETWORK_SLEEP: 143 ar5416SetPowerModeNetworkSleep(ah, setChip); 144 break; 145 default: 146 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode 0x%x\n", 147 __func__, mode); 148 return AH_FALSE; 149 } 150 ahp->ah_powerMode = mode; 151 return status; 152} 153 154/* 155 * Return the current sleep mode of the chip 156 */ 157HAL_POWER_MODE 158ar5416GetPowerMode(struct ath_hal *ah) 159{ 160 int mode = OS_REG_READ(ah, AR_RTC_STATUS); 161 switch (mode & AR_RTC_PM_STATUS_M) { 162 case AR_RTC_STATUS_ON: 163 case AR_RTC_STATUS_WAKEUP: 164 return HAL_PM_AWAKE; 165 case AR_RTC_STATUS_SLEEP: 166 return HAL_PM_NETWORK_SLEEP; 167 case AR_RTC_STATUS_SHUTDOWN: 168 return HAL_PM_FULL_SLEEP; 169 default: 170 HALDEBUG(ah, HAL_DEBUG_ANY, 171 "%s: unknown power mode, RTC_STATUS 0x%x\n", 172 __func__, mode); 173 return HAL_PM_UNDEFINED; 174 } 175} 176#endif /* AH_SUPPORT_AR5416 */ 177