sys/dev/netif/ath/hal/ath_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: ar5210_power.c,v 1.4 2008/11/10 04:08:02 sam Exp $
  18  */
  19 #include "opt_ah.h"
  20
  21 #include "ah.h"
  22 #include "ah_internal.h"
  23
  24 #include "ar5210/ar5210.h"
  25 #include "ar5210/ar5210reg.h"
  26
  27 /*
  28  * Notify Power Mgt is disabled in self-generated frames.
  29  * If requested, set Power Mode of chip to auto/normal.
  30  */
  31 static void
  32 ar5210SetPowerModeAuto(struct ath_hal *ah, int setChip)
  33 {
  34         OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SV);
  35         if (setChip)
  36                 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_ALLOW);
  37 }
  38
  39 /*
  40  * Notify Power Mgt is enabled in self-generated frames.
  41  * If requested, force chip awake.
  42  *
  43  * Returns A_OK if chip is awake or successfully forced awake.
  44  *
  45  * WARNING WARNING WARNING
  46  * There is a problem with the chip where sometimes it will not wake up.
  47  */
  48 static HAL_BOOL
  49 ar5210SetPowerModeAwake(struct ath_hal *ah, int setChip)
  50 {
  51 #define POWER_UP_TIME   2000
  52         uint32_t val;
  53         int i;
  54
  55         if (setChip) {
  56                 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_WAKE);
  57                 OS_DELAY(2000); /* Give chip the chance to awake */
  58
  59                 for (i = POWER_UP_TIME / 200; i != 0; i--) {
  60                         val = OS_REG_READ(ah, AR_PCICFG);
  61                         if ((val & AR_PCICFG_SPWR_DN) == 0)
  62                                 break;
  63                         OS_DELAY(200);
  64                         OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE,
  65                                 AR_SCR_SLE_WAKE);
  66                 }
  67                 if (i == 0) {
  68 #ifdef AH_DEBUG
  69                         ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n",
  70                                 __func__, POWER_UP_TIME/20);
  71 #endif
  72                         return AH_FALSE;
  73                 }
  74         }
  75
  76         OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SV);
  77         return AH_TRUE;
  78 #undef POWER_UP_TIME
  79 }
  80
  81 /*
  82  * Notify Power Mgt is disabled in self-generated frames.
  83  * If requested, force chip to sleep.
  84  */
  85 static void
  86 ar5210SetPowerModeSleep(struct ath_hal *ah, int setChip)
  87 {
  88         OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SV);
  89         if (setChip)
  90                 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_SLP);
  91 }
  92
  93 HAL_BOOL
  94 ar5210SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip)
  95 {
  96         struct ath_hal_5210 *ahp = AH5210(ah);
  97 #ifdef AH_DEBUG
  98         static const char* modes[] = {
  99                 "AWAKE",
 100                 "FULL-SLEEP",
 101                 "NETWORK SLEEP",
 102                 "UNDEFINED"
 103         };
 104 #endif
 105         int status = AH_TRUE;
 106
 107         HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
 108                 modes[ahp->ah_powerMode], modes[mode],
 109                 setChip ? "set chip " : "");
 110         switch (mode) {
 111         case HAL_PM_AWAKE:
 112                 status = ar5210SetPowerModeAwake(ah, setChip);
 113                 break;
 114         case HAL_PM_FULL_SLEEP:
 115                 ar5210SetPowerModeSleep(ah, setChip);
 116                 break;
 117         case HAL_PM_NETWORK_SLEEP:
 118                 ar5210SetPowerModeAuto(ah, setChip);
 119                 break;
 120         default:
 121                 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n",
 122                     __func__, mode);
 123                 return AH_FALSE;
 124         }
 125         ahp->ah_powerMode = mode;
 126         return status;
 127 }
 128
 129 HAL_POWER_MODE
 130 ar5210GetPowerMode(struct ath_hal *ah)
 131 {
 132         /* Just so happens the h/w maps directly to the abstracted value */
 133         return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE);
 134 }