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 1.1.1.1 2008/12/11 04:46:27 alc 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 | } |
135 | |