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 | * $Id: ar5211_power.c,v 1.1.1.1 2008/12/11 04:46:32 alc Exp $ |
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 |
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 |
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 |
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 |
96 | ar5211SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) |
97 | { |
98 | struct ath_hal_5211 *ahp = AH5211(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 = ar5211SetPowerModeAwake(ah, setChip); |
115 | break; |
116 | case HAL_PM_FULL_SLEEP: |
117 | ar5211SetPowerModeSleep(ah, setChip); |
118 | break; |
119 | case HAL_PM_NETWORK_SLEEP: |
120 | ar5211SetPowerModeNetworkSleep(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 | ar5211GetPowerMode(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 | |