1 /* 2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 3 * Copyright (c) 2002-2006 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 "ar5211/ar5211.h" 25 #include "ar5211/ar5211reg.h" 26 #include "ar5211/ar5211desc.h" 27 28 /* 29 * Notify Power Mgt is enabled in self-generated frames. 30 * If requested, force chip awake. 31 * 32 * Returns A_OK if chip is awake or successfully forced awake. 33 * 34 * WARNING WARNING WARNING 35 * There is a problem with the chip where sometimes it will not wake up. 36 */ 37 static HAL_BOOL 38 ar5211SetPowerModeAwake(struct ath_hal *ah, int setChip) 39 { 40 #define POWER_UP_TIME 2000 41 uint32_t val; 42 int i; 43 44 if (setChip) { 45 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_WAKE); 46 OS_DELAY(10); /* Give chip the chance to awake */ 47 48 for (i = POWER_UP_TIME / 200; i != 0; i--) { 49 val = OS_REG_READ(ah, AR_PCICFG); 50 if ((val & AR_PCICFG_SPWR_DN) == 0) 51 break; 52 OS_DELAY(200); 53 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, 54 AR_SCR_SLE_WAKE); 55 } 56 if (i == 0) { 57 #ifdef AH_DEBUG 58 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n", 59 __func__, POWER_UP_TIME/20); 60 #endif 61 return AH_FALSE; 62 } 63 } 64 65 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 66 return AH_TRUE; 67 #undef POWER_UP_TIME 68 } 69 70 /* 71 * Notify Power Mgt is disabled in self-generated frames. 72 * If requested, force chip to sleep. 73 */ 74 static void 75 ar5211SetPowerModeSleep(struct ath_hal *ah, int setChip) 76 { 77 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 78 if (setChip) 79 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_SLP); 80 } 81 82 /* 83 * Notify Power Management is enabled in self-generating 84 * fames. If request, set power mode of chip to 85 * auto/normal. Duration in units of 128us (1/8 TU). 86 */ 87 static void 88 ar5211SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip) 89 { 90 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 91 if (setChip) 92 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_NORM); 93 } 94 95 HAL_BOOL 96 ar5211SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) 97 { 98 struct ath_hal_5211 *ahp = AH5211(ah); 99 #ifdef AH_DEBUG 100 static const char* modes[] = { 101 "AWAKE", 102 "FULL-SLEEP", 103 "NETWORK SLEEP", 104 "UNDEFINED" 105 }; 106 #endif 107 int status = AH_TRUE; 108 109 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__, 110 modes[ahp->ah_powerMode], modes[mode], 111 setChip ? "set chip " : ""); 112 switch (mode) { 113 case HAL_PM_AWAKE: 114 status = ar5211SetPowerModeAwake(ah, setChip); 115 break; 116 case HAL_PM_FULL_SLEEP: 117 ar5211SetPowerModeSleep(ah, setChip); 118 break; 119 case HAL_PM_NETWORK_SLEEP: 120 ar5211SetPowerModeNetworkSleep(ah, setChip); 121 break; 122 default: 123 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n", 124 __func__, mode); 125 return AH_FALSE; 126 } 127 ahp->ah_powerMode = mode; 128 return status; 129 } 130 131 HAL_POWER_MODE 132 ar5211GetPowerMode(struct ath_hal *ah) 133 { 134 /* Just so happens the h/w maps directly to the abstracted value */ 135 return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE); 136 } 137