workbench/devs/networks/atheros5000/hal/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  * $Id$
  18  */
  19 #include "opt_ah.h"
  20
  21 #ifdef AH_SUPPORT_AR5211
  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         struct ath_hal_5211 *ahp = AH5211(ah);
 101 #ifdef AH_DEBUG
 102         static const char* modes[] = {
 103                 "AWAKE",
 104                 "FULL-SLEEP",
 105                 "NETWORK SLEEP",
 106                 "UNDEFINED"
 107         };
 108 #endif
 109         int status = AH_TRUE;
 110
 111         HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
 112                 modes[ahp->ah_powerMode], modes[mode],
 113                 setChip ? "set chip " : "");
 114         switch (mode) {
 115         case HAL_PM_AWAKE:
 116                 status = ar5211SetPowerModeAwake(ah, setChip);
 117                 break;
 118         case HAL_PM_FULL_SLEEP:
 119                 ar5211SetPowerModeSleep(ah, setChip);
 120                 break;
 121         case HAL_PM_NETWORK_SLEEP:
 122                 ar5211SetPowerModeNetworkSleep(ah, setChip);
 123                 break;
 124         default:
 125                 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n",
 126                     __func__, mode);
 127                 return AH_FALSE;
 128         }
 129         ahp->ah_powerMode = mode;
 130         return status;
 131 }
 132
 133 HAL_POWER_MODE
 134 ar5211GetPowerMode(struct ath_hal *ah)
 135 {
 136         /* Just so happens the h/w maps directly to the abstracted value */
 137         return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE);
 138 }
 139 #endif /* AH_SUPPORT_AR5211 */