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 * $FreeBSD$ 18 */ 19 #include "opt_ah.h" 20 21 #include "ah.h" 22 #include "ah_internal.h" 23 24 #include "ar5416/ar5416.h" 25 #include "ar5416/ar5416reg.h" 26 27 /* 28 * Notify Power Mgt is enabled in self-generated frames. 29 * If requested, force chip awake. 30 * 31 * Returns A_OK if chip is awake or successfully forced awake. 32 * 33 * WARNING WARNING WARNING 34 * There is a problem with the chip where sometimes it will not wake up. 35 */ 36 static HAL_BOOL 37 ar5416SetPowerModeAwake(struct ath_hal *ah, int setChip) 38 { 39 #define POWER_UP_TIME 200000 40 uint32_t val; 41 int i = 0; 42 43 if (setChip) { 44 /* 45 * Do a Power-On-Reset if OWL is shutdown 46 * the NetBSD driver power-cycles the Cardbus slot 47 * as part of the reset procedure. 48 */ 49 if ((OS_REG_READ(ah, AR_RTC_STATUS) 50 & AR_RTC_PM_STATUS_M) == AR_RTC_STATUS_SHUTDOWN) { 51 if (!ar5416SetResetReg(ah, HAL_RESET_POWER_ON)) 52 goto bad; 53 AH5416(ah)->ah_initPLL(ah, AH_NULL); 54 } 55 56 if (AR_SREV_HOWL(ah)) 57 OS_REG_SET_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN); 58 59 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 60 if (AR_SREV_HOWL(ah)) 61 OS_DELAY(10000); 62 else 63 OS_DELAY(50); /* Give chip the chance to awake */ 64 65 for (i = POWER_UP_TIME / 50; i != 0; i--) { 66 val = OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M; 67 if (val == AR_RTC_STATUS_ON) 68 break; 69 OS_DELAY(50); 70 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 71 } 72 bad: 73 if (i == 0) { 74 #ifdef AH_DEBUG 75 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n", 76 __func__, POWER_UP_TIME/1000); 77 #endif 78 return AH_FALSE; 79 } 80 } 81 82 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 83 return AH_TRUE; 84 #undef POWER_UP_TIME 85 } 86 87 /* 88 * Notify Power Mgt is disabled in self-generated frames. 89 * If requested, force chip to sleep. 90 */ 91 static void 92 ar5416SetPowerModeSleep(struct ath_hal *ah, int setChip) 93 { 94 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 95 if (setChip) { 96 /* Clear the RTC force wake bit to allow the mac to sleep */ 97 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 98 if (! AR_SREV_HOWL(ah)) 99 OS_REG_WRITE(ah, AR_RC, AR_RC_AHB|AR_RC_HOSTIF); 100 /* Shutdown chip. Active low */ 101 if (! AR_SREV_OWL(ah)) 102 OS_REG_CLR_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN); 103 } 104 } 105 106 /* 107 * Notify Power Management is enabled in self-generating 108 * fames. If request, set power mode of chip to 109 * auto/normal. Duration in units of 128us (1/8 TU). 110 */ 111 static void 112 ar5416SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip) 113 { 114 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 115 116 if (setChip) 117 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 118 } 119 120 /* 121 * Set power mgt to the requested mode, and conditionally set 122 * the chip as well 123 */ 124 HAL_BOOL 125 ar5416SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) 126 { 127 #ifdef AH_DEBUG 128 static const char* modes[] = { 129 "AWAKE", 130 "FULL-SLEEP", 131 "NETWORK SLEEP", 132 "UNDEFINED" 133 }; 134 #endif 135 int status = AH_TRUE; 136 137 #if 0 138 if (!setChip) 139 return AH_TRUE; 140 #endif 141 142 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__, 143 modes[ah->ah_powerMode], modes[mode], setChip ? "set chip " : ""); 144 switch (mode) { 145 case HAL_PM_AWAKE: 146 if (setChip) 147 ah->ah_powerMode = mode; 148 status = ar5416SetPowerModeAwake(ah, setChip); 149 break; 150 case HAL_PM_FULL_SLEEP: 151 ar5416SetPowerModeSleep(ah, setChip); 152 if (setChip) 153 ah->ah_powerMode = mode; 154 break; 155 case HAL_PM_NETWORK_SLEEP: 156 ar5416SetPowerModeNetworkSleep(ah, setChip); 157 if (setChip) 158 ah->ah_powerMode = mode; 159 break; 160 default: 161 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode 0x%x\n", 162 __func__, mode); 163 return AH_FALSE; 164 } 165 return status; 166 } 167 168 /* 169 * Return the current sleep mode of the chip 170 */ 171 HAL_POWER_MODE 172 ar5416GetPowerMode(struct ath_hal *ah) 173 { 174 int mode = OS_REG_READ(ah, AR_RTC_STATUS); 175 switch (mode & AR_RTC_PM_STATUS_M) { 176 case AR_RTC_STATUS_ON: 177 case AR_RTC_STATUS_WAKEUP: 178 return HAL_PM_AWAKE; 179 case AR_RTC_STATUS_SLEEP: 180 return HAL_PM_NETWORK_SLEEP; 181 case AR_RTC_STATUS_SHUTDOWN: 182 return HAL_PM_FULL_SLEEP; 183 default: 184 HALDEBUG(ah, HAL_DEBUG_ANY, 185 "%s: unknown power mode, RTC_STATUS 0x%x\n", 186 __func__, mode); 187 return HAL_PM_UNDEFINED; 188 } 189 } 190