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
ar5210SetPowerModeAuto(struct ath_hal * ah,int setChip)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
ar5210SetPowerModeAwake(struct ath_hal * ah,int setChip)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
ar5210SetPowerModeSleep(struct ath_hal * ah,int setChip)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
ar5210SetPowerMode(struct ath_hal * ah,HAL_POWER_MODE mode,int setChip)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
ar5210GetPowerMode(struct ath_hal * ah)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