workbench/devs/networks/atheros5000/hal/ar5210/ar5210_power.c

   1 /*
   2  * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
   3  * Copyright (c) 2002-2004 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_AR5210
  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         struct ath_hal_5210 *ahp = AH5210(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 = ar5210SetPowerModeAwake(ah, setChip);
 115                 break;
 116         case HAL_PM_FULL_SLEEP:
 117                 ar5210SetPowerModeSleep(ah, setChip);
 118                 break;
 119         case HAL_PM_NETWORK_SLEEP:
 120                 ar5210SetPowerModeAuto(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 ar5210GetPowerMode(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 }
 137 #endif /* AH_SUPPORT_AR5210 */