2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
3 * Copyright (c) 2002-2006 Atheros Communications, Inc.
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.
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.
17 * $Id: ar5211_power.c,v 1.4 2008/11/10 04:08:02 sam Exp $
23 #include "ah_internal.h"
25 #include "ar5211/ar5211.h"
26 #include "ar5211/ar5211reg.h"
27 #include "ar5211/ar5211desc.h"
30 * Notify Power Mgt is enabled in self-generated frames.
31 * If requested, force chip awake.
33 * Returns A_OK if chip is awake or successfully forced awake.
35 * WARNING WARNING WARNING
36 * There is a problem with the chip where sometimes it will not wake up.
39 ar5211SetPowerModeAwake(struct ath_hal *ah, int setChip)
41 #define POWER_UP_TIME 2000
46 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_WAKE);
47 OS_DELAY(10); /* Give chip the chance to awake */
49 for (i = POWER_UP_TIME / 200; i != 0; i--) {
50 val = OS_REG_READ(ah, AR_PCICFG);
51 if ((val & AR_PCICFG_SPWR_DN) == 0)
54 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE,
59 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n",
60 __func__, POWER_UP_TIME/20);
66 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
72 * Notify Power Mgt is disabled in self-generated frames.
73 * If requested, force chip to sleep.
76 ar5211SetPowerModeSleep(struct ath_hal *ah, int setChip)
78 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
80 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_SLP);
84 * Notify Power Management is enabled in self-generating
85 * fames. If request, set power mode of chip to
86 * auto/normal. Duration in units of 128us (1/8 TU).
89 ar5211SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip)
91 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
93 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_NORM);
97 ar5211SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip)
99 struct ath_hal_5211 *ahp = AH5211(ah);
101 static const char* modes[] = {
108 int status = AH_TRUE;
110 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
111 modes[ahp->ah_powerMode], modes[mode],
112 setChip ? "set chip " : "");
115 status = ar5211SetPowerModeAwake(ah, setChip);
117 case HAL_PM_FULL_SLEEP:
118 ar5211SetPowerModeSleep(ah, setChip);
120 case HAL_PM_NETWORK_SLEEP:
121 ar5211SetPowerModeNetworkSleep(ah, setChip);
124 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n",
128 ahp->ah_powerMode = mode;
133 ar5211GetPowerMode(struct ath_hal *ah)
135 /* Just so happens the h/w maps directly to the abstracted value */
136 return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE);