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: ar5416_power.c,v 1.1.1.1 2008/12/11 04:46:48 alc Exp $ |
18 | */ |
19 | #include "opt_ah.h" |
20 | |
21 | #include "ah.h" |
22 | #include "ah_internal.h" |
23 | |
24 | #include "ar5416/ar5416.h" |
25 | #include "ar5416/ar5416reg.h" |
26 | |
27 | /* |
28 | * Notify Power Mgt is enabled in self-generated frames. |
29 | * If requested, force chip awake. |
30 | * |
31 | * Returns A_OK if chip is awake or successfully forced awake. |
32 | * |
33 | * WARNING WARNING WARNING |
34 | * There is a problem with the chip where sometimes it will not wake up. |
35 | */ |
36 | static HAL_BOOL |
37 | ar5416SetPowerModeAwake(struct ath_hal *ah, int setChip) |
38 | { |
39 | #define POWER_UP_TIME 200000 |
40 | uint32_t val; |
41 | int i = 0; |
42 | |
43 | if (setChip) { |
44 | /* |
45 | * Do a Power-On-Reset if OWL is shutdown |
46 | * the NetBSD driver power-cycles the Cardbus slot |
47 | * as part of the reset procedure. |
48 | */ |
49 | if ((OS_REG_READ(ah, AR_RTC_STATUS) |
50 | & AR_RTC_PM_STATUS_M) == AR_RTC_STATUS_SHUTDOWN) { |
51 | if (!ar5416SetResetReg(ah, HAL_RESET_POWER_ON)) |
52 | goto bad; |
53 | } |
54 | |
55 | OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); |
56 | OS_DELAY(50); /* Give chip the chance to awake */ |
57 | |
58 | for (i = POWER_UP_TIME / 50; i != 0; i--) { |
59 | val = OS_REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M; |
60 | if (val == AR_RTC_STATUS_ON) |
61 | break; |
62 | OS_DELAY(50); |
63 | OS_REG_SET_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); |
64 | } |
65 | bad: |
66 | if (i == 0) { |
67 | #ifdef AH_DEBUG |
68 | ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n" , |
69 | __func__, POWER_UP_TIME/1000); |
70 | #endif |
71 | return AH_FALSE; |
72 | } |
73 | } |
74 | |
75 | OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); |
76 | return AH_TRUE; |
77 | #undef POWER_UP_TIME |
78 | } |
79 | |
80 | /* |
81 | * Notify Power Mgt is disabled in self-generated frames. |
82 | * If requested, force chip to sleep. |
83 | */ |
84 | static void |
85 | ar5416SetPowerModeSleep(struct ath_hal *ah, int setChip) |
86 | { |
87 | OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); |
88 | if (setChip) { |
89 | /* Clear the RTC force wake bit to allow the mac to sleep */ |
90 | OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); |
91 | OS_REG_WRITE(ah, AR_RC, AR_RC_AHB|AR_RC_HOSTIF); |
92 | /* Shutdown chip. Active low */ |
93 | OS_REG_CLR_BIT(ah, AR_RTC_RESET, AR_RTC_RESET_EN); |
94 | } |
95 | } |
96 | |
97 | /* |
98 | * Notify Power Management is enabled in self-generating |
99 | * fames. If request, set power mode of chip to |
100 | * auto/normal. Duration in units of 128us (1/8 TU). |
101 | */ |
102 | static void |
103 | ar5416SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip) |
104 | { |
105 | OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); |
106 | |
107 | if (setChip) |
108 | OS_REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN); |
109 | } |
110 | |
111 | /* |
112 | * Set power mgt to the requested mode, and conditionally set |
113 | * the chip as well |
114 | */ |
115 | HAL_BOOL |
116 | ar5416SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) |
117 | { |
118 | struct ath_hal_5212 *ahp = AH5212(ah); |
119 | #ifdef AH_DEBUG |
120 | static const char* modes[] = { |
121 | "AWAKE" , |
122 | "FULL-SLEEP" , |
123 | "NETWORK SLEEP" , |
124 | "UNDEFINED" |
125 | }; |
126 | #endif |
127 | int status = AH_TRUE; |
128 | if (!setChip) |
129 | return AH_TRUE; |
130 | |
131 | HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n" , __func__, |
132 | modes[ahp->ah_powerMode], modes[mode], setChip ? "set chip " : "" ); |
133 | switch (mode) { |
134 | case HAL_PM_AWAKE: |
135 | status = ar5416SetPowerModeAwake(ah, setChip); |
136 | break; |
137 | case HAL_PM_FULL_SLEEP: |
138 | ar5416SetPowerModeSleep(ah, setChip); |
139 | break; |
140 | case HAL_PM_NETWORK_SLEEP: |
141 | ar5416SetPowerModeNetworkSleep(ah, setChip); |
142 | break; |
143 | default: |
144 | HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode 0x%x\n" , |
145 | __func__, mode); |
146 | return AH_FALSE; |
147 | } |
148 | ahp->ah_powerMode = mode; |
149 | return status; |
150 | } |
151 | |
152 | /* |
153 | * Return the current sleep mode of the chip |
154 | */ |
155 | HAL_POWER_MODE |
156 | ar5416GetPowerMode(struct ath_hal *ah) |
157 | { |
158 | int mode = OS_REG_READ(ah, AR_RTC_STATUS); |
159 | switch (mode & AR_RTC_PM_STATUS_M) { |
160 | case AR_RTC_STATUS_ON: |
161 | case AR_RTC_STATUS_WAKEUP: |
162 | return HAL_PM_AWAKE; |
163 | case AR_RTC_STATUS_SLEEP: |
164 | return HAL_PM_NETWORK_SLEEP; |
165 | case AR_RTC_STATUS_SHUTDOWN: |
166 | return HAL_PM_FULL_SLEEP; |
167 | default: |
168 | HALDEBUG(ah, HAL_DEBUG_ANY, |
169 | "%s: unknown power mode, RTC_STATUS 0x%x\n" , |
170 | __func__, mode); |
171 | return HAL_PM_UNDEFINED; |
172 | } |
173 | } |
174 | |