sys/external/isc/atheros_hal/dist/ar5211/ar5211_power.c

   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  * $Id: ar5211_power.c,v 1.1.1.1 2008/12/11 04:46:32 alc Exp $
  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 }