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 * $FreeBSD$
18 */
19 #include "opt_ah.h"
20
21 #include "ah.h"
22 #include "ah_internal.h"
23
24 #include "ar5211/ar5211.h"
25 #include "ar5211/ar5211reg.h"
26 #include "ar5211/ar5211desc.h"
27
28 /*
29 * Notify Power Mgt is enabled in self-generated frames.
30 * If requested, force chip awake.
31 *
32 * Returns A_OK if chip is awake or successfully forced awake.
33 *
34 * WARNING WARNING WARNING
35 * There is a problem with the chip where sometimes it will not wake up.
36 */
37 static HAL_BOOL
ar5211SetPowerModeAwake(struct ath_hal * ah,int setChip)38 ar5211SetPowerModeAwake(struct ath_hal *ah, int setChip)
39 {
40 #define POWER_UP_TIME 2000
41 uint32_t val;
42 int i;
43
44 if (setChip) {
45 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_WAKE);
46 OS_DELAY(10); /* Give chip the chance to awake */
47
48 for (i = POWER_UP_TIME / 200; i != 0; i--) {
49 val = OS_REG_READ(ah, AR_PCICFG);
50 if ((val & AR_PCICFG_SPWR_DN) == 0)
51 break;
52 OS_DELAY(200);
53 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE,
54 AR_SCR_SLE_WAKE);
55 }
56 if (i == 0) {
57 #ifdef AH_DEBUG
58 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n",
59 __func__, POWER_UP_TIME/20);
60 #endif
61 return AH_FALSE;
62 }
63 }
64
65 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
66 return AH_TRUE;
67 #undef POWER_UP_TIME
68 }
69
70 /*
71 * Notify Power Mgt is disabled in self-generated frames.
72 * If requested, force chip to sleep.
73 */
74 static void
ar5211SetPowerModeSleep(struct ath_hal * ah,int setChip)75 ar5211SetPowerModeSleep(struct ath_hal *ah, int setChip)
76 {
77 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
78 if (setChip)
79 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_SLP);
80 }
81
82 /*
83 * Notify Power Management is enabled in self-generating
84 * fames. If request, set power mode of chip to
85 * auto/normal. Duration in units of 128us (1/8 TU).
86 */
87 static void
ar5211SetPowerModeNetworkSleep(struct ath_hal * ah,int setChip)88 ar5211SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip)
89 {
90 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
91 if (setChip)
92 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_NORM);
93 }
94
95 HAL_BOOL
ar5211SetPowerMode(struct ath_hal * ah,HAL_POWER_MODE mode,int setChip)96 ar5211SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip)
97 {
98 #ifdef AH_DEBUG
99 static const char* modes[] = {
100 "AWAKE",
101 "FULL-SLEEP",
102 "NETWORK SLEEP",
103 "UNDEFINED"
104 };
105 #endif
106 int status = AH_TRUE;
107
108 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__,
109 modes[ah->ah_powerMode], modes[mode],
110 setChip ? "set chip " : "");
111 switch (mode) {
112 case HAL_PM_AWAKE:
113 if (setChip)
114 ah->ah_powerMode = mode;
115 status = ar5211SetPowerModeAwake(ah, setChip);
116 break;
117 case HAL_PM_FULL_SLEEP:
118 ar5211SetPowerModeSleep(ah, setChip);
119 if (setChip)
120 ah->ah_powerMode = mode;
121 break;
122 case HAL_PM_NETWORK_SLEEP:
123 ar5211SetPowerModeNetworkSleep(ah, setChip);
124 if (setChip)
125 ah->ah_powerMode = mode;
126 break;
127 default:
128 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n",
129 __func__, mode);
130 return AH_FALSE;
131 }
132 return status;
133 }
134
135 HAL_POWER_MODE
ar5211GetPowerMode(struct ath_hal * ah)136 ar5211GetPowerMode(struct ath_hal *ah)
137 {
138 /* Just so happens the h/w maps directly to the abstracted value */
139 return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE);
140 }
141