1 /*- 2 * SPDX-License-Identifier: ISC 3 * 4 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 5 * Copyright (c) 2002-2006 Atheros Communications, Inc. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 * 19 * $FreeBSD$ 20 */ 21 #include "opt_ah.h" 22 23 #include "ah.h" 24 #include "ah_internal.h" 25 26 #include "ar5211/ar5211.h" 27 #include "ar5211/ar5211reg.h" 28 #include "ar5211/ar5211desc.h" 29 30 /* 31 * Notify Power Mgt is enabled in self-generated frames. 32 * If requested, force chip awake. 33 * 34 * Returns A_OK if chip is awake or successfully forced awake. 35 * 36 * WARNING WARNING WARNING 37 * There is a problem with the chip where sometimes it will not wake up. 38 */ 39 static HAL_BOOL 40 ar5211SetPowerModeAwake(struct ath_hal *ah, int setChip) 41 { 42 #define POWER_UP_TIME 2000 43 uint32_t val; 44 int i; 45 46 if (setChip) { 47 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_WAKE); 48 OS_DELAY(10); /* Give chip the chance to awake */ 49 50 for (i = POWER_UP_TIME / 200; i != 0; i--) { 51 val = OS_REG_READ(ah, AR_PCICFG); 52 if ((val & AR_PCICFG_SPWR_DN) == 0) 53 break; 54 OS_DELAY(200); 55 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, 56 AR_SCR_SLE_WAKE); 57 } 58 if (i == 0) { 59 #ifdef AH_DEBUG 60 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n", 61 __func__, POWER_UP_TIME/20); 62 #endif 63 return AH_FALSE; 64 } 65 } 66 67 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 68 return AH_TRUE; 69 #undef POWER_UP_TIME 70 } 71 72 /* 73 * Notify Power Mgt is disabled in self-generated frames. 74 * If requested, force chip to sleep. 75 */ 76 static void 77 ar5211SetPowerModeSleep(struct ath_hal *ah, int setChip) 78 { 79 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 80 if (setChip) 81 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_SLP); 82 } 83 84 /* 85 * Notify Power Management is enabled in self-generating 86 * fames. If request, set power mode of chip to 87 * auto/normal. Duration in units of 128us (1/8 TU). 88 */ 89 static void 90 ar5211SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip) 91 { 92 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 93 if (setChip) 94 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_NORM); 95 } 96 97 HAL_BOOL 98 ar5211SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) 99 { 100 #ifdef AH_DEBUG 101 static const char* modes[] = { 102 "AWAKE", 103 "FULL-SLEEP", 104 "NETWORK SLEEP", 105 "UNDEFINED" 106 }; 107 #endif 108 int status = AH_TRUE; 109 110 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__, 111 modes[ah->ah_powerMode], modes[mode], 112 setChip ? "set chip " : ""); 113 switch (mode) { 114 case HAL_PM_AWAKE: 115 if (setChip) 116 ah->ah_powerMode = mode; 117 status = ar5211SetPowerModeAwake(ah, setChip); 118 break; 119 case HAL_PM_FULL_SLEEP: 120 ar5211SetPowerModeSleep(ah, setChip); 121 if (setChip) 122 ah->ah_powerMode = mode; 123 break; 124 case HAL_PM_NETWORK_SLEEP: 125 ar5211SetPowerModeNetworkSleep(ah, setChip); 126 if (setChip) 127 ah->ah_powerMode = mode; 128 break; 129 default: 130 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n", 131 __func__, mode); 132 return AH_FALSE; 133 } 134 return status; 135 } 136 137 HAL_POWER_MODE 138 ar5211GetPowerMode(struct ath_hal *ah) 139 { 140 /* Just so happens the h/w maps directly to the abstracted value */ 141 return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE); 142 } 143