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      1 /*
      2  * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
      3  * Copyright (c) 2002-2008 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: ar5312_power.c,v 1.1.1.1 2008/12/11 04:46:45 alc Exp $
     18  */
     19 #include "opt_ah.h"
     20 
     21 #ifdef AH_SUPPORT_AR5312
     22 
     23 #include "ah.h"
     24 #include "ah_internal.h"
     25 
     26 #include "ar5312/ar5312.h"
     27 #include "ar5312/ar5312reg.h"
     28 #include "ar5212/ar5212desc.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 ar5312SetPowerModeAwake(struct ath_hal *ah, int setChip)
     41 {
     42         /* No need for this at the moment for APs */
     43 	return AH_TRUE;
     44 }
     45 
     46 /*
     47  * Notify Power Mgt is disabled in self-generated frames.
     48  * If requested, force chip to sleep.
     49  */
     50 static void
     51 ar5312SetPowerModeSleep(struct ath_hal *ah, int setChip)
     52 {
     53         /* No need for this at the moment for APs */
     54 }
     55 
     56 /*
     57  * Notify Power Management is enabled in self-generating
     58  * fames.  If request, set power mode of chip to
     59  * auto/normal.  Duration in units of 128us (1/8 TU).
     60  */
     61 static void
     62 ar5312SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip)
     63 {
     64         /* No need for this at the moment for APs */
     65 }
     66 
     67 /*
     68  * Set power mgt to the requested mode, and conditionally set
     69  * the chip as well
     70  */
     71 HAL_BOOL
     72 ar5312SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip)
     73 {
     74 	struct ath_hal_5212 *ahp = AH5212(ah);
     75 #ifdef AH_DEBUG
     76 	static const char* modes[] = {
     77 		"AWAKE",
     78 		"FULL-SLEEP",
     79 		"NETWORK SLEEP",
     80 		"UNDEFINED"
     81 	};
     82 #endif
     83 	int status = AH_TRUE;
     84 
     85 	HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
     86 		modes[ahp->ah_powerMode], modes[mode],
     87 		setChip ? "set chip " : "");
     88 	switch (mode) {
     89 	case HAL_PM_AWAKE:
     90 		status = ar5312SetPowerModeAwake(ah, setChip);
     91 		break;
     92 	case HAL_PM_FULL_SLEEP:
     93 		ar5312SetPowerModeSleep(ah, setChip);
     94 		break;
     95 	case HAL_PM_NETWORK_SLEEP:
     96 		ar5312SetPowerModeNetworkSleep(ah, setChip);
     97 		break;
     98 	default:
     99 		HALDEBUG(ah, HAL_DEBUG_POWER, "%s: unknown power mode %u\n",
    100 		    __func__, mode);
    101 		return AH_FALSE;
    102 	}
    103 	ahp->ah_powerMode = mode;
    104 	return status;
    105 }
    106 
    107 /*
    108  * Return the current sleep mode of the chip
    109  */
    110 uint32_t
    111 ar5312GetPowerMode(struct ath_hal *ah)
    112 {
    113 	return HAL_PM_AWAKE;
    114 }
    115 
    116 /*
    117  * Return the current sleep state of the chip
    118  * TRUE = sleeping
    119  */
    120 HAL_BOOL
    121 ar5312GetPowerStatus(struct ath_hal *ah)
    122 {
    123         return 0;		/* Currently, 5312 is never in sleep mode. */
    124 }
    125 #endif /* AH_SUPPORT_AR5312 */
    126