1 /*- 2 * SPDX-License-Identifier: ISC 3 * 4 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 5 * Copyright (c) 2002-2004 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 "ar5210/ar5210.h" 27 #include "ar5210/ar5210reg.h" 28 29 /* 30 * Notify Power Mgt is disabled in self-generated frames. 31 * If requested, set Power Mode of chip to auto/normal. 32 */ 33 static void 34 ar5210SetPowerModeAuto(struct ath_hal *ah, int setChip) 35 { 36 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SV); 37 if (setChip) 38 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_ALLOW); 39 } 40 41 /* 42 * Notify Power Mgt is enabled in self-generated frames. 43 * If requested, force chip awake. 44 * 45 * Returns A_OK if chip is awake or successfully forced awake. 46 * 47 * WARNING WARNING WARNING 48 * There is a problem with the chip where sometimes it will not wake up. 49 */ 50 static HAL_BOOL 51 ar5210SetPowerModeAwake(struct ath_hal *ah, int setChip) 52 { 53 #define POWER_UP_TIME 2000 54 uint32_t val; 55 int i; 56 57 if (setChip) { 58 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_WAKE); 59 OS_DELAY(2000); /* Give chip the chance to awake */ 60 61 for (i = POWER_UP_TIME / 200; i != 0; i--) { 62 val = OS_REG_READ(ah, AR_PCICFG); 63 if ((val & AR_PCICFG_SPWR_DN) == 0) 64 break; 65 OS_DELAY(200); 66 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, 67 AR_SCR_SLE_WAKE); 68 } 69 if (i == 0) { 70 #ifdef AH_DEBUG 71 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n", 72 __func__, POWER_UP_TIME/20); 73 #endif 74 return AH_FALSE; 75 } 76 } 77 78 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SV); 79 return AH_TRUE; 80 #undef POWER_UP_TIME 81 } 82 83 /* 84 * Notify Power Mgt is disabled in self-generated frames. 85 * If requested, force chip to sleep. 86 */ 87 static void 88 ar5210SetPowerModeSleep(struct ath_hal *ah, int setChip) 89 { 90 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SV); 91 if (setChip) 92 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_SLP); 93 } 94 95 HAL_BOOL 96 ar5210SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) 97 { 98 #ifdef AH_DEBUG 99 static const char* modes[] = { 100 "AWAKE", 101 "FULL-SLEEP", 102 "NETWORK SLEEP", 103 "UNDEFINED" 104 }; 105 #endif 106 int status = AH_TRUE; 107 108 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__, 109 modes[ah->ah_powerMode], modes[mode], 110 setChip ? "set chip " : ""); 111 switch (mode) { 112 case HAL_PM_AWAKE: 113 if (setChip) 114 ah->ah_powerMode = mode; 115 status = ar5210SetPowerModeAwake(ah, setChip); 116 break; 117 case HAL_PM_FULL_SLEEP: 118 ar5210SetPowerModeSleep(ah, setChip); 119 if (setChip) 120 ah->ah_powerMode = mode; 121 break; 122 case HAL_PM_NETWORK_SLEEP: 123 ar5210SetPowerModeAuto(ah, setChip); 124 if (setChip) 125 ah->ah_powerMode = mode; 126 break; 127 default: 128 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n", 129 __func__, mode); 130 return AH_FALSE; 131 } 132 return status; 133 } 134 135 HAL_POWER_MODE 136 ar5210GetPowerMode(struct ath_hal *ah) 137 { 138 /* Just so happens the h/w maps directly to the abstracted value */ 139 return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE); 140 } 141