ar5210_power.c

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    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 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/ath/ath_hal/ar5210/ar5210_power.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ath/ath_hal/ar5210/ar5210_power.c