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 } 54 55 if (AR_SREV_HOWL(ah)) 56 OS_REG_SET_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN); 57 58 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 59 if (AR_SREV_HOWL(ah)) 60 OS_DELAY(10000); 61 else 62 OS_DELAY(50); /* Give chip the chance to awake */ 63 64 for (i = POWER_UP_TIME / 50; i != 0; i--) { 65 val = OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M; 66 if (val == AR_RTC_STATUS_ON) 67 break; 68 OS_DELAY(50); 69 OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 70 } 71 bad: 72 if (i == 0) { 73 #ifdef AH_DEBUG 74 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n", 75 __func__, POWER_UP_TIME/1000); 76 #endif 77 return AH_FALSE; 78 } 79 } 80 81 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 82 return AH_TRUE; 83 #undef POWER_UP_TIME 84 } 85 86 /* 87 * Notify Power Mgt is disabled in self-generated frames. 88 * If requested, force chip to sleep. 89 */ 90 static void 91 ar5416SetPowerModeSleep(struct ath_hal *ah, int setChip) 92 { 93 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 94 if (setChip) { 95 /* Clear the RTC force wake bit to allow the mac to sleep */ 96 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 97 if (! AR_SREV_HOWL(ah)) 98 OS_REG_WRITE(ah, AR_RC, AR_RC_AHB|AR_RC_HOSTIF); 99 /* Shutdown chip. Active low */ 100 if (! AR_SREV_OWL(ah)) 101 OS_REG_CLR_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN); 102 } 103 } 104 105 /* 106 * Notify Power Management is enabled in self-generating 107 * fames. If request, set power mode of chip to 108 * auto/normal. Duration in units of 128us (1/8 TU). 109 */ 110 static void 111 ar5416SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip) 112 { 113 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 114 115 if (setChip) 116 OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); 117 } 118 119 /* 120 * Set power mgt to the requested mode, and conditionally set 121 * the chip as well 122 */ 123 HAL_BOOL 124 ar5416SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) 125 { 126 struct ath_hal_5212 *ahp = AH5212(ah); 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 if (!setChip) 137 return AH_TRUE; 138 139 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__, 140 modes[ahp->ah_powerMode], modes[mode], setChip ? "set chip " : ""); 141 switch (mode) { 142 case HAL_PM_AWAKE: 143 status = ar5416SetPowerModeAwake(ah, setChip); 144 break; 145 case HAL_PM_FULL_SLEEP: 146 ar5416SetPowerModeSleep(ah, setChip); 147 break; 148 case HAL_PM_NETWORK_SLEEP: 149 ar5416SetPowerModeNetworkSleep(ah, setChip); 150 break; 151 default: 152 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode 0x%x\n", 153 __func__, mode); 154 return AH_FALSE; 155 } 156 ahp->ah_powerMode = mode; 157 return status; 158 } 159 160 /* 161 * Return the current sleep mode of the chip 162 */ 163 HAL_POWER_MODE 164 ar5416GetPowerMode(struct ath_hal *ah) 165 { 166 int mode = OS_REG_READ(ah, AR_RTC_STATUS); 167 switch (mode & AR_RTC_PM_STATUS_M) { 168 case AR_RTC_STATUS_ON: 169 case AR_RTC_STATUS_WAKEUP: 170 return HAL_PM_AWAKE; 171 case AR_RTC_STATUS_SLEEP: 172 return HAL_PM_NETWORK_SLEEP; 173 case AR_RTC_STATUS_SHUTDOWN: 174 return HAL_PM_FULL_SLEEP; 175 default: 176 HALDEBUG(ah, HAL_DEBUG_ANY, 177 "%s: unknown power mode, RTC_STATUS 0x%x\n", 178 __func__, mode); 179 return HAL_PM_UNDEFINED; 180 } 181 } 182